/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-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:32:13,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:32:13,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:32:13,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:32:13,262 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 [2021-08-06 15:32:13,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:32:13,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:32:13,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:32:13,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:32:13,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:32:13,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:32:13,295 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:32:13,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:32:13,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:32:13,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:32:13,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:32:13,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:32:13,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:32:13,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:32:13,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:32:13,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:32:13,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:32:13,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:32:13,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:32:13,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:32:13,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:32:13,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:32:13,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:32:13,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:32:13,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:32:13,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:32:13,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:32:13,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:32:13,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:32:13,299 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:32:13,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:32:13,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:32:13,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:32:13,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:32:13,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:32:13,592 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:32:13,593 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:32:13,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-08-06 15:32:13,594 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-08-06 15:32:13,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:32:13,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:32:13,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:32:13,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:32:13,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:32:13,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:32:13,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:32:13,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:32:13,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:32:13,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:32:13,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:32:13,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:32:13,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:32:13,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/1) ... [2021-08-06 15:32:13,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:32:13,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:13,694 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) [2021-08-06 15:32:13,698 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 [2021-08-06 15:32:13,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:32:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:32:13,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:32:13,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:32:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:32:13,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:32:13,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:32:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:32:13,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:32:13,723 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:32:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:32:13,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:32:13,724 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:32:13,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:32:13,864 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:32:13,865 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:32:13 BoogieIcfgContainer [2021-08-06 15:32:13,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:32:13,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:32:13,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:32:13,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:32:13,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:32:13" (1/2) ... [2021-08-06 15:32:13,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674f06dd and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:32:13, skipping insertion in model container [2021-08-06 15:32:13,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:32:13" (2/2) ... [2021-08-06 15:32:13,871 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-08-06 15:32:13,874 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:32:13,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:32:13,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:32:13,875 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:32:13,900 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:32:13,929 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:32:13,934 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 [2021-08-06 15:32:13,934 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:32:13,941 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-08-06 15:32:13,980 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:32:14,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:14,002 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] [2021-08-06 15:32:14,003 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash 599746223, now seen corresponding path program 1 times [2021-08-06 15:32:14,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:14,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105159651] [2021-08-06 15:32:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:14,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:14,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:14,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105159651] [2021-08-06 15:32:14,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105159651] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:32:14,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:32:14,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:32:14,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412530221] [2021-08-06 15:32:14,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:32:14,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:32:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:32:14,253 INFO L87 Difference]: Start difference. First operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:14,330 INFO L93 Difference]: Finished difference Result 156 states and 438 transitions. [2021-08-06 15:32:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:32:14,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:32:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:14,343 INFO L225 Difference]: With dead ends: 156 [2021-08-06 15:32:14,343 INFO L226 Difference]: Without dead ends: 156 [2021-08-06 15:32:14,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:32:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-06 15:32:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2021-08-06 15:32:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-08-06 15:32:14,402 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-08-06 15:32:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:14,403 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-08-06 15:32:14,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-08-06 15:32:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:32:14,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:14,406 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] [2021-08-06 15:32:14,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:32:14,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash -530635729, now seen corresponding path program 1 times [2021-08-06 15:32:14,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:14,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485475529] [2021-08-06 15:32:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:14,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:14,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:14,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485475529] [2021-08-06 15:32:14,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485475529] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:32:14,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:32:14,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:32:14,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897737290] [2021-08-06 15:32:14,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:32:14,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:32:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:32:14,475 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:14,512 INFO L93 Difference]: Finished difference Result 160 states and 450 transitions. [2021-08-06 15:32:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:32:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:32:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:14,515 INFO L225 Difference]: With dead ends: 160 [2021-08-06 15:32:14,515 INFO L226 Difference]: Without dead ends: 160 [2021-08-06 15:32:14,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:32:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-06 15:32:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-08-06 15:32:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-08-06 15:32:14,536 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-08-06 15:32:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:14,536 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-08-06 15:32:14,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-08-06 15:32:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:32:14,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:14,538 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] [2021-08-06 15:32:14,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:32:14,538 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 247610633, now seen corresponding path program 1 times [2021-08-06 15:32:14,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:14,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296694909] [2021-08-06 15:32:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:14,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:14,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:14,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296694909] [2021-08-06 15:32:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296694909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:14,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308749896] [2021-08-06 15:32:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:14,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:14,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:14,857 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) [2021-08-06 15:32:14,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:32:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:32:14,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:15,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-08-06 15:32:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:15,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308749896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:15,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:15,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-06 15:32:15,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098913610] [2021-08-06 15:32:15,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:32:15,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:32:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:32:15,566 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:16,033 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-08-06 15:32:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:32:16,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:32:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:16,035 INFO L225 Difference]: With dead ends: 395 [2021-08-06 15:32:16,035 INFO L226 Difference]: Without dead ends: 280 [2021-08-06 15:32:16,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:32:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-06 15:32:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-08-06 15:32:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-08-06 15:32:16,042 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-08-06 15:32:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:16,042 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-08-06 15:32:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-08-06 15:32:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:32:16,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:16,044 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] [2021-08-06 15:32:16,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:16,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:16,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1205438725, now seen corresponding path program 2 times [2021-08-06 15:32:16,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:16,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156403000] [2021-08-06 15:32:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:16,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:16,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:16,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156403000] [2021-08-06 15:32:16,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156403000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:16,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809706381] [2021-08-06 15:32:16,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:16,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:16,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:16,497 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) [2021-08-06 15:32:16,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:32:16,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:16,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:32:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-08-06 15:32:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:17,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809706381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:17,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:17,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 15:32:17,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64583117] [2021-08-06 15:32:17,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:32:17,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:17,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:32:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:32:17,140 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:18,133 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-08-06 15:32:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:32:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:32:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:18,146 INFO L225 Difference]: With dead ends: 639 [2021-08-06 15:32:18,146 INFO L226 Difference]: Without dead ends: 546 [2021-08-06 15:32:18,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:32:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-06 15:32:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-08-06 15:32:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-08-06 15:32:18,172 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-08-06 15:32:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-08-06 15:32:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-08-06 15:32:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:18,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:18,175 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] [2021-08-06 15:32:18,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 15:32:18,392 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,SelfDestructingSolverStorable3 [2021-08-06 15:32:18,392 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1267533103, now seen corresponding path program 3 times [2021-08-06 15:32:18,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:18,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525740725] [2021-08-06 15:32:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:18,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:18,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:18,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525740725] [2021-08-06 15:32:18,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525740725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:18,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554413899] [2021-08-06 15:32:18,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:18,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:18,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:18,469 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) [2021-08-06 15:32:18,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:32:18,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:32:18,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:32:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 15:32:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:32:19,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554413899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:19,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:19,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 15:32:19,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431847128] [2021-08-06 15:32:19,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:32:19,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:32:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:32:19,163 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:20,412 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-08-06 15:32:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:32:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:32:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:20,419 INFO L225 Difference]: With dead ends: 1001 [2021-08-06 15:32:20,419 INFO L226 Difference]: Without dead ends: 966 [2021-08-06 15:32:20,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:32:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-08-06 15:32:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-08-06 15:32:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-08-06 15:32:20,436 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-08-06 15:32:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:20,436 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-08-06 15:32:20,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-08-06 15:32:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:20,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:20,437 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] [2021-08-06 15:32:20,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:20,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:20,645 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1282993899, now seen corresponding path program 4 times [2021-08-06 15:32:20,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:20,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112805094] [2021-08-06 15:32:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:20,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:20,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:20,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112805094] [2021-08-06 15:32:20,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112805094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:20,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009498337] [2021-08-06 15:32:20,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:32:20,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:20,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:20,714 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) [2021-08-06 15:32:20,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:32:20,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:32:20,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:20,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:32:20,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:21,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009498337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:21,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:21,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:32:21,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399045767] [2021-08-06 15:32:21,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:21,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:21,077 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:21,821 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-08-06 15:32:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:32:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:32:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:21,826 INFO L225 Difference]: With dead ends: 1201 [2021-08-06 15:32:21,826 INFO L226 Difference]: Without dead ends: 1201 [2021-08-06 15:32:21,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:32:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-08-06 15:32:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-08-06 15:32:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-08-06 15:32:21,839 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-08-06 15:32:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:21,840 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-08-06 15:32:21,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-08-06 15:32:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:21,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:21,841 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] [2021-08-06 15:32:21,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:22,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:22,058 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:22,059 INFO L82 PathProgramCache]: Analyzing trace with hash 764560807, now seen corresponding path program 5 times [2021-08-06 15:32:22,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:22,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471227972] [2021-08-06 15:32:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:22,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:22,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471227972] [2021-08-06 15:32:22,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471227972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109392546] [2021-08-06 15:32:22,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:32:22,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:22,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:22,140 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) [2021-08-06 15:32:22,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:32:22,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:32:22,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:32:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:22,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109392546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:22,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:22,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:32:22,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196774302] [2021-08-06 15:32:22,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:22,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:22,543 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:23,347 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-08-06 15:32:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:32:23,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:32:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:23,363 INFO L225 Difference]: With dead ends: 1858 [2021-08-06 15:32:23,364 INFO L226 Difference]: Without dead ends: 1858 [2021-08-06 15:32:23,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:32:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-08-06 15:32:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-08-06 15:32:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-08-06 15:32:23,386 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-08-06 15:32:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:23,387 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-08-06 15:32:23,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-08-06 15:32:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:23,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:23,390 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] [2021-08-06 15:32:23,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:23,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:23,593 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash -355436231, now seen corresponding path program 6 times [2021-08-06 15:32:23,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:23,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028898508] [2021-08-06 15:32:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:23,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:23,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:23,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028898508] [2021-08-06 15:32:23,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028898508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:23,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734232832] [2021-08-06 15:32:23,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:32:23,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:23,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:23,651 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) [2021-08-06 15:32:23,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:32:23,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:32:23,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:23,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:32:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:24,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:32:24,361 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:24,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-08-06 15:32:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:24,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734232832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:24,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:24,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-08-06 15:32:24,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164567551] [2021-08-06 15:32:24,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:32:24,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:32:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:32:24,706 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:25,983 INFO L93 Difference]: Finished difference Result 1214 states and 3354 transitions. [2021-08-06 15:32:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:32:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:32:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:25,988 INFO L225 Difference]: With dead ends: 1214 [2021-08-06 15:32:25,988 INFO L226 Difference]: Without dead ends: 1025 [2021-08-06 15:32:25,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:32:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-08-06 15:32:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 463. [2021-08-06 15:32:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1515151515151514) internal successors, (1456), 462 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1456 transitions. [2021-08-06 15:32:26,002 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1456 transitions. Word has length 26 [2021-08-06 15:32:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:26,002 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1456 transitions. [2021-08-06 15:32:26,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1456 transitions. [2021-08-06 15:32:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:26,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:26,003 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] [2021-08-06 15:32:26,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:26,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:26,220 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash 465961067, now seen corresponding path program 7 times [2021-08-06 15:32:26,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:26,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948708920] [2021-08-06 15:32:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:26,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:26,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:26,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948708920] [2021-08-06 15:32:26,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948708920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:26,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593900547] [2021-08-06 15:32:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:32:26,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:26,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:26,285 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) [2021-08-06 15:32:26,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:32:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:26,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:32:26,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:26,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593900547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:26,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:26,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:32:26,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115818693] [2021-08-06 15:32:26,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:26,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:26,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:26,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:26,723 INFO L87 Difference]: Start difference. First operand 463 states and 1456 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:27,260 INFO L93 Difference]: Finished difference Result 1418 states and 4191 transitions. [2021-08-06 15:32:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:32:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:32:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:27,266 INFO L225 Difference]: With dead ends: 1418 [2021-08-06 15:32:27,266 INFO L226 Difference]: Without dead ends: 1418 [2021-08-06 15:32:27,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:32:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-08-06 15:32:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 478. [2021-08-06 15:32:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.2054507337526204) internal successors, (1529), 477 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1529 transitions. [2021-08-06 15:32:27,281 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1529 transitions. Word has length 26 [2021-08-06 15:32:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:27,281 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1529 transitions. [2021-08-06 15:32:27,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1529 transitions. [2021-08-06 15:32:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:27,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:27,283 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] [2021-08-06 15:32:27,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:27,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:27,502 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash -619306999, now seen corresponding path program 1 times [2021-08-06 15:32:27,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:27,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67120360] [2021-08-06 15:32:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:27,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:27,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:27,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67120360] [2021-08-06 15:32:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67120360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:27,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118556440] [2021-08-06 15:32:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:27,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:27,879 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) [2021-08-06 15:32:27,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:32:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:32:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:28,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:32:28,725 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-08-06 15:32:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:28,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118556440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:28,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:28,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 15:32:28,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917433711] [2021-08-06 15:32:28,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:32:28,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:32:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:32:28,860 INFO L87 Difference]: Start difference. First operand 478 states and 1529 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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) [2021-08-06 15:32:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:29,300 INFO L93 Difference]: Finished difference Result 851 states and 2514 transitions. [2021-08-06 15:32:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:32:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 28 [2021-08-06 15:32:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:29,303 INFO L225 Difference]: With dead ends: 851 [2021-08-06 15:32:29,304 INFO L226 Difference]: Without dead ends: 764 [2021-08-06 15:32:29,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:32:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-08-06 15:32:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 500. [2021-08-06 15:32:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.190380761523046) internal successors, (1592), 499 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1592 transitions. [2021-08-06 15:32:29,314 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1592 transitions. Word has length 28 [2021-08-06 15:32:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:29,314 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1592 transitions. [2021-08-06 15:32:29,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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) [2021-08-06 15:32:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1592 transitions. [2021-08-06 15:32:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:29,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:29,316 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] [2021-08-06 15:32:29,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:29,534 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,SelfDestructingSolverStorable9 [2021-08-06 15:32:29,534 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1096873097, now seen corresponding path program 2 times [2021-08-06 15:32:29,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:29,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200305914] [2021-08-06 15:32:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:29,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:29,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:29,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200305914] [2021-08-06 15:32:29,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200305914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:29,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111745554] [2021-08-06 15:32:29,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:29,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:29,918 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) [2021-08-06 15:32:29,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:32:30,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:30,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:30,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:32:30,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:30,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 15:32:30,661 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:30,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:32:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:32:30,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111745554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:30,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:30,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 15:32:30,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354761061] [2021-08-06 15:32:30,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:32:30,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:32:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:32:30,844 INFO L87 Difference]: Start difference. First operand 500 states and 1592 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-06 15:32:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:32,607 INFO L93 Difference]: Finished difference Result 1305 states and 3739 transitions. [2021-08-06 15:32:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:32:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 28 [2021-08-06 15:32:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:32,612 INFO L225 Difference]: With dead ends: 1305 [2021-08-06 15:32:32,612 INFO L226 Difference]: Without dead ends: 1130 [2021-08-06 15:32:32,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1458.8ms TimeCoverageRelationStatistics Valid=553, Invalid=2639, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:32:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-08-06 15:32:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 551. [2021-08-06 15:32:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.1654545454545455) internal successors, (1741), 550 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1741 transitions. [2021-08-06 15:32:32,626 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1741 transitions. Word has length 28 [2021-08-06 15:32:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:32,626 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1741 transitions. [2021-08-06 15:32:32,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-06 15:32:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1741 transitions. [2021-08-06 15:32:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:32,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:32,628 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] [2021-08-06 15:32:32,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:32,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:32,841 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1056275707, now seen corresponding path program 8 times [2021-08-06 15:32:32,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:32,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318525513] [2021-08-06 15:32:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:32,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:33,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:33,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318525513] [2021-08-06 15:32:33,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318525513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:33,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638612307] [2021-08-06 15:32:33,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:33,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:33,288 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) [2021-08-06 15:32:33,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:32:33,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:32:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:33,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 15:32:34,014 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:34,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-08-06 15:32:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:32:34,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638612307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:34,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:34,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:32:34,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873398210] [2021-08-06 15:32:34,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:32:34,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:32:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:32:34,222 INFO L87 Difference]: Start difference. First operand 551 states and 1741 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:35,476 INFO L93 Difference]: Finished difference Result 990 states and 2916 transitions. [2021-08-06 15:32:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:32:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:32:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:35,480 INFO L225 Difference]: With dead ends: 990 [2021-08-06 15:32:35,481 INFO L226 Difference]: Without dead ends: 904 [2021-08-06 15:32:35,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1074.6ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:32:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-08-06 15:32:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 635. [2021-08-06 15:32:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.0741324921135647) internal successors, (1949), 634 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1949 transitions. [2021-08-06 15:32:35,493 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1949 transitions. Word has length 28 [2021-08-06 15:32:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:35,493 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1949 transitions. [2021-08-06 15:32:35,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1949 transitions. [2021-08-06 15:32:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:35,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:35,495 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] [2021-08-06 15:32:35,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-06 15:32:35,717 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,SelfDestructingSolverStorable11 [2021-08-06 15:32:35,717 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1277676113, now seen corresponding path program 3 times [2021-08-06 15:32:35,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:35,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816084414] [2021-08-06 15:32:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:35,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:36,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:36,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816084414] [2021-08-06 15:32:36,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816084414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:36,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814274077] [2021-08-06 15:32:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:36,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:36,089 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) [2021-08-06 15:32:36,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:32:36,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:32:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:32:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:36,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 15:32:36,833 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:36,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-08-06 15:32:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:32:37,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814274077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:37,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:37,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 15:32:37,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362710347] [2021-08-06 15:32:37,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:32:37,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:32:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:32:37,181 INFO L87 Difference]: Start difference. First operand 635 states and 1949 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-06 15:32:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:39,604 INFO L93 Difference]: Finished difference Result 1968 states and 5529 transitions. [2021-08-06 15:32:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:32:39,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 28 [2021-08-06 15:32:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:39,611 INFO L225 Difference]: With dead ends: 1968 [2021-08-06 15:32:39,611 INFO L226 Difference]: Without dead ends: 1785 [2021-08-06 15:32:39,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1935.5ms TimeCoverageRelationStatistics Valid=682, Invalid=3478, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:32:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-06 15:32:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 690. [2021-08-06 15:32:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.1335268505079825) internal successors, (2159), 689 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2159 transitions. [2021-08-06 15:32:39,628 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2159 transitions. Word has length 28 [2021-08-06 15:32:39,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:39,628 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2159 transitions. [2021-08-06 15:32:39,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-06 15:32:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2159 transitions. [2021-08-06 15:32:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:39,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:39,630 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] [2021-08-06 15:32:39,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:39,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 15:32:39,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:39,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1299153033, now seen corresponding path program 9 times [2021-08-06 15:32:39,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:39,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843418021] [2021-08-06 15:32:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:39,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:40,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:40,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843418021] [2021-08-06 15:32:40,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843418021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:40,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651948976] [2021-08-06 15:32:40,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:40,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:40,271 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) [2021-08-06 15:32:40,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:32:40,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:32:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:32:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:40,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 15:32:41,091 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-08-06 15:32:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:32:41,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651948976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:41,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:41,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:32:41,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976802778] [2021-08-06 15:32:41,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:32:41,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:32:41,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:32:41,293 INFO L87 Difference]: Start difference. First operand 690 states and 2159 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:42,667 INFO L93 Difference]: Finished difference Result 1184 states and 3517 transitions. [2021-08-06 15:32:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:32:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:32:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:42,671 INFO L225 Difference]: With dead ends: 1184 [2021-08-06 15:32:42,671 INFO L226 Difference]: Without dead ends: 1055 [2021-08-06 15:32:42,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1146.4ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:32:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-08-06 15:32:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 694. [2021-08-06 15:32:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 3.1616161616161618) internal successors, (2191), 693 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2191 transitions. [2021-08-06 15:32:42,694 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2191 transitions. Word has length 28 [2021-08-06 15:32:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:42,696 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2191 transitions. [2021-08-06 15:32:42,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2191 transitions. [2021-08-06 15:32:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:42,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:42,698 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] [2021-08-06 15:32:42,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:42,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 15:32:42,909 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1851738833, now seen corresponding path program 10 times [2021-08-06 15:32:42,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:42,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928534917] [2021-08-06 15:32:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:42,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:43,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:43,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928534917] [2021-08-06 15:32:43,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928534917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:43,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647119356] [2021-08-06 15:32:43,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:32:43,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:43,278 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) [2021-08-06 15:32:43,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:32:43,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:32:43,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:43,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:32:43,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:44,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:32:44,150 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-06 15:32:44,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-08-06 15:32:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:44,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647119356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:44,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:44,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-08-06 15:32:44,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470065296] [2021-08-06 15:32:44,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:32:44,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:44,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:32:44,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:32:44,365 INFO L87 Difference]: Start difference. First operand 694 states and 2191 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:46,365 INFO L93 Difference]: Finished difference Result 1597 states and 4809 transitions. [2021-08-06 15:32:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:32:46,366 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:32:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:46,370 INFO L225 Difference]: With dead ends: 1597 [2021-08-06 15:32:46,370 INFO L226 Difference]: Without dead ends: 1261 [2021-08-06 15:32:46,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1690.0ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:32:46,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-08-06 15:32:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 918. [2021-08-06 15:32:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.243184296619411) internal successors, (2974), 917 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2974 transitions. [2021-08-06 15:32:46,387 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2974 transitions. Word has length 28 [2021-08-06 15:32:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:46,388 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 2974 transitions. [2021-08-06 15:32:46,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2974 transitions. [2021-08-06 15:32:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:46,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:46,390 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] [2021-08-06 15:32:46,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:46,604 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,SelfDestructingSolverStorable14 [2021-08-06 15:32:46,605 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash -475245375, now seen corresponding path program 4 times [2021-08-06 15:32:46,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:46,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564963965] [2021-08-06 15:32:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:46,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:47,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:47,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564963965] [2021-08-06 15:32:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564963965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:47,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194752002] [2021-08-06 15:32:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:32:47,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:47,029 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) [2021-08-06 15:32:47,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:32:47,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:32:47,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:32:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:47,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:32:47,901 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:47,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:32:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:32:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194752002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:48,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:48,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 15:32:48,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611062362] [2021-08-06 15:32:48,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:32:48,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:32:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:32:48,123 INFO L87 Difference]: Start difference. First operand 918 states and 2974 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:49,395 INFO L93 Difference]: Finished difference Result 1826 states and 5614 transitions. [2021-08-06 15:32:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:32:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:32:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:49,402 INFO L225 Difference]: With dead ends: 1826 [2021-08-06 15:32:49,402 INFO L226 Difference]: Without dead ends: 1710 [2021-08-06 15:32:49,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1194.6ms TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:32:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-08-06 15:32:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1033. [2021-08-06 15:32:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.238372093023256) internal successors, (3342), 1032 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3342 transitions. [2021-08-06 15:32:49,420 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3342 transitions. Word has length 28 [2021-08-06 15:32:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:49,420 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 3342 transitions. [2021-08-06 15:32:49,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3342 transitions. [2021-08-06 15:32:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:49,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:49,422 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] [2021-08-06 15:32:49,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:49,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:49,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash -194757819, now seen corresponding path program 5 times [2021-08-06 15:32:49,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:49,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267184121] [2021-08-06 15:32:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:49,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:49,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:49,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267184121] [2021-08-06 15:32:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267184121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:49,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026965828] [2021-08-06 15:32:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:32:49,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:49,970 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) [2021-08-06 15:32:49,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:32:50,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:32:50,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:50,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:32:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:32:50,821 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:50,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:32:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:51,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026965828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:51,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:51,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 15:32:51,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857509419] [2021-08-06 15:32:51,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:32:51,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:32:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:32:51,189 INFO L87 Difference]: Start difference. First operand 1033 states and 3342 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-06 15:32:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:53,211 INFO L93 Difference]: Finished difference Result 1944 states and 5939 transitions. [2021-08-06 15:32:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:32:53,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 28 [2021-08-06 15:32:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:53,219 INFO L225 Difference]: With dead ends: 1944 [2021-08-06 15:32:53,219 INFO L226 Difference]: Without dead ends: 1718 [2021-08-06 15:32:53,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1690.5ms TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:32:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-08-06 15:32:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 980. [2021-08-06 15:32:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 3.247191011235955) internal successors, (3179), 979 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 3179 transitions. [2021-08-06 15:32:53,239 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 3179 transitions. Word has length 28 [2021-08-06 15:32:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:53,239 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 3179 transitions. [2021-08-06 15:32:53,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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) [2021-08-06 15:32:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 3179 transitions. [2021-08-06 15:32:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:53,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:53,241 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] [2021-08-06 15:32:53,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:53,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 15:32:53,442 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1159185199, now seen corresponding path program 6 times [2021-08-06 15:32:53,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:53,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113292423] [2021-08-06 15:32:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:53,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:53,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:53,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113292423] [2021-08-06 15:32:53,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113292423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:53,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067676019] [2021-08-06 15:32:53,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:32:53,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:53,831 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) [2021-08-06 15:32:53,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:32:54,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:32:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:54,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:32:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:54,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:32:54,749 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:54,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-08-06 15:32:54,927 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:32:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 39 [2021-08-06 15:32:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:55,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067676019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:55,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:55,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-06 15:32:55,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345862086] [2021-08-06 15:32:55,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:32:55,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:32:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:32:55,284 INFO L87 Difference]: Start difference. First operand 980 states and 3179 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-08-06 15:32:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:56,931 INFO L93 Difference]: Finished difference Result 1903 states and 5843 transitions. [2021-08-06 15:32:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:32:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 28 [2021-08-06 15:32:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:56,937 INFO L225 Difference]: With dead ends: 1903 [2021-08-06 15:32:56,937 INFO L226 Difference]: Without dead ends: 1738 [2021-08-06 15:32:56,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:32:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-08-06 15:32:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1067. [2021-08-06 15:32:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.24765478424015) internal successors, (3462), 1066 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3462 transitions. [2021-08-06 15:32:56,963 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3462 transitions. Word has length 28 [2021-08-06 15:32:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:56,964 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3462 transitions. [2021-08-06 15:32:56,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-08-06 15:32:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3462 transitions. [2021-08-06 15:32:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:56,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:56,966 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] [2021-08-06 15:32:56,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:57,177 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,SelfDestructingSolverStorable17 [2021-08-06 15:32:57,177 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1892236617, now seen corresponding path program 7 times [2021-08-06 15:32:57,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:57,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325536375] [2021-08-06 15:32:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:57,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:57,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:57,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325536375] [2021-08-06 15:32:57,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325536375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:57,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343143563] [2021-08-06 15:32:57,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:32:57,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:57,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:57,563 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) [2021-08-06 15:32:57,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:32:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:32:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:58,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:32:58,592 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:32:58,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:32:58,701 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:32:58,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-08-06 15:32:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:59,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343143563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:59,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:59,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 15:32:59,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130333585] [2021-08-06 15:32:59,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:32:59,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:32:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:32:59,032 INFO L87 Difference]: Start difference. First operand 1067 states and 3462 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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) [2021-08-06 15:32:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:59,699 INFO L93 Difference]: Finished difference Result 2142 states and 6769 transitions. [2021-08-06 15:32:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:32:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 28 [2021-08-06 15:32:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:59,703 INFO L225 Difference]: With dead ends: 2142 [2021-08-06 15:32:59,703 INFO L226 Difference]: Without dead ends: 1781 [2021-08-06 15:32:59,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 658.5ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:32:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-08-06 15:32:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1080. [2021-08-06 15:32:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.267840593141798) internal successors, (3526), 1079 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3526 transitions. [2021-08-06 15:32:59,721 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3526 transitions. Word has length 28 [2021-08-06 15:32:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:59,721 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 3526 transitions. [2021-08-06 15:32:59,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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) [2021-08-06 15:32:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3526 transitions. [2021-08-06 15:32:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:59,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:59,723 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] [2021-08-06 15:32:59,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:59,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:59,940 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 417015497, now seen corresponding path program 8 times [2021-08-06 15:32:59,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:59,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431744415] [2021-08-06 15:32:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:59,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:00,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:00,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431744415] [2021-08-06 15:33:00,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431744415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:00,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706949274] [2021-08-06 15:33:00,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:00,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:00,445 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) [2021-08-06 15:33:00,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:33:01,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:01,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:33:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:01,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:33:01,436 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:33:01,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:33:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:01,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706949274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:01,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:01,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-08-06 15:33:01,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098991232] [2021-08-06 15:33:01,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:33:01,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:33:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:33:01,743 INFO L87 Difference]: Start difference. First operand 1080 states and 3526 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-08-06 15:33:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:02,365 INFO L93 Difference]: Finished difference Result 1868 states and 6027 transitions. [2021-08-06 15:33:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:33:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 28 [2021-08-06 15:33:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:02,369 INFO L225 Difference]: With dead ends: 1868 [2021-08-06 15:33:02,369 INFO L226 Difference]: Without dead ends: 1550 [2021-08-06 15:33:02,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:33:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-08-06 15:33:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1000. [2021-08-06 15:33:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 3.31031031031031) internal successors, (3307), 999 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3307 transitions. [2021-08-06 15:33:02,386 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3307 transitions. Word has length 28 [2021-08-06 15:33:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:02,386 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 3307 transitions. [2021-08-06 15:33:02,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-08-06 15:33:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3307 transitions. [2021-08-06 15:33:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:02,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:02,388 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:02,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:02,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:02,606 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:02,606 INFO L82 PathProgramCache]: Analyzing trace with hash 372169135, now seen corresponding path program 9 times [2021-08-06 15:33:02,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:02,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627009384] [2021-08-06 15:33:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:02,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:02,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:02,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627009384] [2021-08-06 15:33:02,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627009384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:02,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915456263] [2021-08-06 15:33:02,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:02,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:02,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:02,671 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) [2021-08-06 15:33:02,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:33:03,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:33:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915456263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:03,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 15:33:03,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884188157] [2021-08-06 15:33:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:03,688 INFO L87 Difference]: Start difference. First operand 1000 states and 3307 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2021-08-06 15:33:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:04,925 INFO L93 Difference]: Finished difference Result 5021 states and 14874 transitions. [2021-08-06 15:33:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 15:33:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 30 [2021-08-06 15:33:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:04,936 INFO L225 Difference]: With dead ends: 5021 [2021-08-06 15:33:04,936 INFO L226 Difference]: Without dead ends: 5021 [2021-08-06 15:33:04,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 829.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 15:33:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-08-06 15:33:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 1162. [2021-08-06 15:33:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.411714039621016) internal successors, (3961), 1161 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3961 transitions. [2021-08-06 15:33:04,978 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3961 transitions. Word has length 30 [2021-08-06 15:33:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:04,978 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 3961 transitions. [2021-08-06 15:33:04,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2021-08-06 15:33:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3961 transitions. [2021-08-06 15:33:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:04,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:04,980 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:05,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:05,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:05,193 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash 387629931, now seen corresponding path program 10 times [2021-08-06 15:33:05,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:05,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144974523] [2021-08-06 15:33:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:05,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:05,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:05,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144974523] [2021-08-06 15:33:05,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144974523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:05,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721365168] [2021-08-06 15:33:05,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:05,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:05,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:05,269 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) [2021-08-06 15:33:05,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:33:06,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:06,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:06,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:06,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721365168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:06,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:06,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 15:33:06,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262777385] [2021-08-06 15:33:06,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:06,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:06,309 INFO L87 Difference]: Start difference. First operand 1162 states and 3961 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2021-08-06 15:33:07,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:07,591 INFO L93 Difference]: Finished difference Result 5134 states and 15015 transitions. [2021-08-06 15:33:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 15:33:07,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 30 [2021-08-06 15:33:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:07,601 INFO L225 Difference]: With dead ends: 5134 [2021-08-06 15:33:07,601 INFO L226 Difference]: Without dead ends: 5134 [2021-08-06 15:33:07,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 867.9ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 15:33:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5134 states. [2021-08-06 15:33:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5134 to 1069. [2021-08-06 15:33:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.3183520599250937) internal successors, (3544), 1068 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3544 transitions. [2021-08-06 15:33:07,647 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3544 transitions. Word has length 30 [2021-08-06 15:33:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:07,648 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 3544 transitions. [2021-08-06 15:33:07,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2021-08-06 15:33:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3544 transitions. [2021-08-06 15:33:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:07,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:07,650 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:07,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:07,864 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,SelfDestructingSolverStorable21 [2021-08-06 15:33:07,865 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1080904167, now seen corresponding path program 11 times [2021-08-06 15:33:07,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:07,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380889947] [2021-08-06 15:33:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:07,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:07,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:07,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380889947] [2021-08-06 15:33:07,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380889947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:07,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347026368] [2021-08-06 15:33:07,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:07,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:07,922 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) [2021-08-06 15:33:07,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:33:08,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:33:08,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:08,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347026368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:08,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:08,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:33:08,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111840396] [2021-08-06 15:33:08,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:08,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:08,961 INFO L87 Difference]: Start difference. First operand 1069 states and 3544 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:09,742 INFO L93 Difference]: Finished difference Result 3755 states and 10881 transitions. [2021-08-06 15:33:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:33:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:09,762 INFO L225 Difference]: With dead ends: 3755 [2021-08-06 15:33:09,763 INFO L226 Difference]: Without dead ends: 3755 [2021-08-06 15:33:09,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 492.0ms TimeCoverageRelationStatistics Valid=747, Invalid=2793, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:33:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2021-08-06 15:33:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 1075. [2021-08-06 15:33:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 3.32122905027933) internal successors, (3567), 1074 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3567 transitions. [2021-08-06 15:33:09,791 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3567 transitions. Word has length 30 [2021-08-06 15:33:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 3567 transitions. [2021-08-06 15:33:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3567 transitions. [2021-08-06 15:33:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:09,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:09,793 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:09,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:10,019 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,SelfDestructingSolverStorable22 [2021-08-06 15:33:10,019 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:10,019 INFO L82 PathProgramCache]: Analyzing trace with hash 25526773, now seen corresponding path program 12 times [2021-08-06 15:33:10,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:10,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221126611] [2021-08-06 15:33:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:10,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:10,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:10,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221126611] [2021-08-06 15:33:10,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221126611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:10,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802244892] [2021-08-06 15:33:10,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:10,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:10,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:10,081 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) [2021-08-06 15:33:10,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:33:10,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:33:10,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:10,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:11,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802244892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:11,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:11,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:33:11,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753496214] [2021-08-06 15:33:11,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:11,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:11,103 INFO L87 Difference]: Start difference. First operand 1075 states and 3567 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:11,858 INFO L93 Difference]: Finished difference Result 3582 states and 10478 transitions. [2021-08-06 15:33:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:33:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:11,864 INFO L225 Difference]: With dead ends: 3582 [2021-08-06 15:33:11,864 INFO L226 Difference]: Without dead ends: 3566 [2021-08-06 15:33:11,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:33:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2021-08-06 15:33:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 1063. [2021-08-06 15:33:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.3116760828625234) internal successors, (3517), 1062 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3517 transitions. [2021-08-06 15:33:11,893 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3517 transitions. Word has length 30 [2021-08-06 15:33:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:11,893 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 3517 transitions. [2021-08-06 15:33:11,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3517 transitions. [2021-08-06 15:33:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:11,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:11,896 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:11,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 15:33:12,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:12,104 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1250800199, now seen corresponding path program 13 times [2021-08-06 15:33:12,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:12,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184214692] [2021-08-06 15:33:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:12,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:12,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:12,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184214692] [2021-08-06 15:33:12,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184214692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:12,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880942287] [2021-08-06 15:33:12,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:12,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:12,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:12,157 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) [2021-08-06 15:33:12,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:33:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:13,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880942287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:13,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:13,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:33:13,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231948721] [2021-08-06 15:33:13,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:33:13,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:13,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:33:13,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:33:13,236 INFO L87 Difference]: Start difference. First operand 1063 states and 3517 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:13,966 INFO L93 Difference]: Finished difference Result 3969 states and 11423 transitions. [2021-08-06 15:33:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:33:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:13,973 INFO L225 Difference]: With dead ends: 3969 [2021-08-06 15:33:13,973 INFO L226 Difference]: Without dead ends: 3945 [2021-08-06 15:33:13,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:33:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2021-08-06 15:33:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 957. [2021-08-06 15:33:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.215481171548117) internal successors, (3074), 956 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3074 transitions. [2021-08-06 15:33:14,001 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3074 transitions. Word has length 30 [2021-08-06 15:33:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:14,001 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3074 transitions. [2021-08-06 15:33:14,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3074 transitions. [2021-08-06 15:33:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:14,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:14,026 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:14,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:14,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:14,227 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash -980290507, now seen corresponding path program 14 times [2021-08-06 15:33:14,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:14,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91473184] [2021-08-06 15:33:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:14,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:14,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:14,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91473184] [2021-08-06 15:33:14,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91473184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:14,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166949864] [2021-08-06 15:33:14,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:14,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:14,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:14,282 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) [2021-08-06 15:33:14,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:33:15,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:15,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:15,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166949864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:15,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:15,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:33:15,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568418060] [2021-08-06 15:33:15,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:33:15,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:15,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:33:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:33:15,370 INFO L87 Difference]: Start difference. First operand 957 states and 3074 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:16,246 INFO L93 Difference]: Finished difference Result 3869 states and 10836 transitions. [2021-08-06 15:33:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 15:33:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:16,253 INFO L225 Difference]: With dead ends: 3869 [2021-08-06 15:33:16,253 INFO L226 Difference]: Without dead ends: 3869 [2021-08-06 15:33:16,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:33:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2021-08-06 15:33:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 939. [2021-08-06 15:33:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.2174840085287846) internal successors, (3018), 938 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 3018 transitions. [2021-08-06 15:33:16,281 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 3018 transitions. Word has length 30 [2021-08-06 15:33:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:16,281 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 3018 transitions. [2021-08-06 15:33:16,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 3018 transitions. [2021-08-06 15:33:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:16,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:16,283 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:16,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:16,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 15:33:16,497 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:16,497 INFO L82 PathProgramCache]: Analyzing trace with hash -210189137, now seen corresponding path program 15 times [2021-08-06 15:33:16,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:16,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640549651] [2021-08-06 15:33:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:16,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:16,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:16,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640549651] [2021-08-06 15:33:16,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640549651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:16,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172029088] [2021-08-06 15:33:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:16,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:16,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:16,549 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) [2021-08-06 15:33:16,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:33:17,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:33:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:17,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172029088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:17,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:17,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:33:17,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184185429] [2021-08-06 15:33:17,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:17,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:17,655 INFO L87 Difference]: Start difference. First operand 939 states and 3018 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:18,544 INFO L93 Difference]: Finished difference Result 3764 states and 11204 transitions. [2021-08-06 15:33:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 15:33:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:18,550 INFO L225 Difference]: With dead ends: 3764 [2021-08-06 15:33:18,550 INFO L226 Difference]: Without dead ends: 3764 [2021-08-06 15:33:18,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=788, Invalid=3244, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:33:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3764 states. [2021-08-06 15:33:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3764 to 1210. [2021-08-06 15:33:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.3085194375516958) internal successors, (4000), 1209 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4000 transitions. [2021-08-06 15:33:18,578 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4000 transitions. Word has length 30 [2021-08-06 15:33:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:18,579 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 4000 transitions. [2021-08-06 15:33:18,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4000 transitions. [2021-08-06 15:33:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:18,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:18,581 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:18,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:18,781 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,SelfDestructingSolverStorable26 [2021-08-06 15:33:18,781 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1265566531, now seen corresponding path program 16 times [2021-08-06 15:33:18,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:18,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113652368] [2021-08-06 15:33:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:18,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:18,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:18,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113652368] [2021-08-06 15:33:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113652368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:18,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033973645] [2021-08-06 15:33:18,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:18,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:18,835 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) [2021-08-06 15:33:18,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:33:19,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:19,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:19,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:19,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033973645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:19,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:19,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:33:19,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831593051] [2021-08-06 15:33:19,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:19,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:19,925 INFO L87 Difference]: Start difference. First operand 1210 states and 4000 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:20,689 INFO L93 Difference]: Finished difference Result 3584 states and 10767 transitions. [2021-08-06 15:33:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:33:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:20,695 INFO L225 Difference]: With dead ends: 3584 [2021-08-06 15:33:20,695 INFO L226 Difference]: Without dead ends: 3568 [2021-08-06 15:33:20,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=675, Invalid=2517, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:33:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-08-06 15:33:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 1204. [2021-08-06 15:33:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.3059019118869495) internal successors, (3977), 1203 states have internal predecessors, (3977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 3977 transitions. [2021-08-06 15:33:20,722 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 3977 transitions. Word has length 30 [2021-08-06 15:33:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:20,722 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 3977 transitions. [2021-08-06 15:33:20,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 3977 transitions. [2021-08-06 15:33:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:20,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:20,724 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:20,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:20,942 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,SelfDestructingSolverStorable27 [2021-08-06 15:33:20,942 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:20,942 INFO L82 PathProgramCache]: Analyzing trace with hash 217568407, now seen corresponding path program 17 times [2021-08-06 15:33:20,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:20,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441321808] [2021-08-06 15:33:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:20,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:20,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:20,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441321808] [2021-08-06 15:33:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441321808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:20,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600201340] [2021-08-06 15:33:20,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:20,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:20,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:20,998 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) [2021-08-06 15:33:21,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:33:21,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:33:21,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:21,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:22,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600201340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:22,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:22,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:33:22,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506948407] [2021-08-06 15:33:22,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:33:22,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:33:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:33:22,099 INFO L87 Difference]: Start difference. First operand 1204 states and 3977 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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) [2021-08-06 15:33:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:22,790 INFO L93 Difference]: Finished difference Result 3470 states and 10404 transitions. [2021-08-06 15:33:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:33:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 30 [2021-08-06 15:33:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:22,796 INFO L225 Difference]: With dead ends: 3470 [2021-08-06 15:33:22,796 INFO L226 Difference]: Without dead ends: 3422 [2021-08-06 15:33:22,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:33:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-08-06 15:33:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1216. [2021-08-06 15:33:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.2954732510288065) internal successors, (4004), 1215 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4004 transitions. [2021-08-06 15:33:22,820 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4004 transitions. Word has length 30 [2021-08-06 15:33:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:22,821 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 4004 transitions. [2021-08-06 15:33:22,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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) [2021-08-06 15:33:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4004 transitions. [2021-08-06 15:33:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:22,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:22,823 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:22,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:23,023 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,SelfDestructingSolverStorable28 [2021-08-06 15:33:23,023 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:23,023 INFO L82 PathProgramCache]: Analyzing trace with hash -693862061, now seen corresponding path program 18 times [2021-08-06 15:33:23,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:23,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009672781] [2021-08-06 15:33:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:23,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:23,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:23,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009672781] [2021-08-06 15:33:23,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009672781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:23,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682807974] [2021-08-06 15:33:23,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:23,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:23,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:23,078 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) [2021-08-06 15:33:23,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:33:23,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:33:23,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:23,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:24,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682807974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:24,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:24,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:33:24,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566197537] [2021-08-06 15:33:24,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:33:24,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:24,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:33:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:33:24,163 INFO L87 Difference]: Start difference. First operand 1216 states and 4004 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:24,848 INFO L93 Difference]: Finished difference Result 3827 states and 11278 transitions. [2021-08-06 15:33:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:33:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:24,854 INFO L225 Difference]: With dead ends: 3827 [2021-08-06 15:33:24,854 INFO L226 Difference]: Without dead ends: 3751 [2021-08-06 15:33:24,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:33:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2021-08-06 15:33:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 1230. [2021-08-06 15:33:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.2929210740439383) internal successors, (4047), 1229 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4047 transitions. [2021-08-06 15:33:24,881 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4047 transitions. Word has length 30 [2021-08-06 15:33:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:24,881 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 4047 transitions. [2021-08-06 15:33:24,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4047 transitions. [2021-08-06 15:33:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:24,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:24,883 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:24,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:25,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:25,097 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2109100503, now seen corresponding path program 19 times [2021-08-06 15:33:25,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:25,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886959976] [2021-08-06 15:33:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:25,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:25,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:25,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886959976] [2021-08-06 15:33:25,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886959976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:25,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373132053] [2021-08-06 15:33:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:25,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:25,149 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) [2021-08-06 15:33:25,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:33:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:26,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373132053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:26,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:26,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:33:26,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095144807] [2021-08-06 15:33:26,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:33:26,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:26,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:33:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:33:26,244 INFO L87 Difference]: Start difference. First operand 1230 states and 4047 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:26,977 INFO L93 Difference]: Finished difference Result 3643 states and 10974 transitions. [2021-08-06 15:33:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:33:26,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:26,983 INFO L225 Difference]: With dead ends: 3643 [2021-08-06 15:33:26,984 INFO L226 Difference]: Without dead ends: 3623 [2021-08-06 15:33:26,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:33:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-08-06 15:33:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 1400. [2021-08-06 15:33:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.2337383845604) internal successors, (4524), 1399 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4524 transitions. [2021-08-06 15:33:27,016 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4524 transitions. Word has length 30 [2021-08-06 15:33:27,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:27,017 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4524 transitions. [2021-08-06 15:33:27,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4524 transitions. [2021-08-06 15:33:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:27,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:27,019 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:27,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:27,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:27,221 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1915357101, now seen corresponding path program 20 times [2021-08-06 15:33:27,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:27,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592525612] [2021-08-06 15:33:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:27,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:27,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:27,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592525612] [2021-08-06 15:33:27,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592525612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:27,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572163732] [2021-08-06 15:33:27,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:27,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:27,276 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) [2021-08-06 15:33:27,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:33:28,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:28,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572163732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:28,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:28,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:33:28,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951380961] [2021-08-06 15:33:28,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:33:28,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:33:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:33:28,436 INFO L87 Difference]: Start difference. First operand 1400 states and 4524 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:29,252 INFO L93 Difference]: Finished difference Result 3880 states and 11558 transitions. [2021-08-06 15:33:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 15:33:29,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:29,258 INFO L225 Difference]: With dead ends: 3880 [2021-08-06 15:33:29,258 INFO L226 Difference]: Without dead ends: 3880 [2021-08-06 15:33:29,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:33:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-08-06 15:33:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1386. [2021-08-06 15:33:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.2368231046931406) internal successors, (4483), 1385 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4483 transitions. [2021-08-06 15:33:29,284 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4483 transitions. Word has length 30 [2021-08-06 15:33:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:29,284 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 4483 transitions. [2021-08-06 15:33:29,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4483 transitions. [2021-08-06 15:33:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:29,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:29,286 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:29,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:29,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 15:33:29,487 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:29,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2076034385, now seen corresponding path program 21 times [2021-08-06 15:33:29,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:29,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076763728] [2021-08-06 15:33:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:29,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:29,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:29,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076763728] [2021-08-06 15:33:29,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076763728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:29,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767158695] [2021-08-06 15:33:29,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:29,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:29,548 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:29,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:33:30,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:33:30,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:30,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:30,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767158695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:30,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:30,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:33:30,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796812095] [2021-08-06 15:33:30,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:33:30,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:33:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:33:30,763 INFO L87 Difference]: Start difference. First operand 1386 states and 4483 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:31,949 INFO L93 Difference]: Finished difference Result 5413 states and 16415 transitions. [2021-08-06 15:33:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 15:33:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:31,959 INFO L225 Difference]: With dead ends: 5413 [2021-08-06 15:33:31,959 INFO L226 Difference]: Without dead ends: 5413 [2021-08-06 15:33:31,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 826.3ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 15:33:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-08-06 15:33:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 1890. [2021-08-06 15:33:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.338803599788248) internal successors, (6307), 1889 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6307 transitions. [2021-08-06 15:33:32,012 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6307 transitions. Word has length 30 [2021-08-06 15:33:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:32,012 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 6307 transitions. [2021-08-06 15:33:32,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6307 transitions. [2021-08-06 15:33:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:32,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:32,015 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:32,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:32,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:32,217 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1163555517, now seen corresponding path program 22 times [2021-08-06 15:33:32,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:32,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041559697] [2021-08-06 15:33:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:32,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:32,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:32,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041559697] [2021-08-06 15:33:32,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041559697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:32,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108339840] [2021-08-06 15:33:32,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:32,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:32,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:32,275 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:32,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:33:33,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:33,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:33,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:33,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108339840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:33,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:33,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:33:33,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815764131] [2021-08-06 15:33:33,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:33:33,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:33,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:33:33,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:33:33,465 INFO L87 Difference]: Start difference. First operand 1890 states and 6307 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:34,502 INFO L93 Difference]: Finished difference Result 5130 states and 15678 transitions. [2021-08-06 15:33:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:33:34,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:34,511 INFO L225 Difference]: With dead ends: 5130 [2021-08-06 15:33:34,511 INFO L226 Difference]: Without dead ends: 5114 [2021-08-06 15:33:34,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 15:33:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-08-06 15:33:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 1830. [2021-08-06 15:33:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 3.348824494259158) internal successors, (6125), 1829 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6125 transitions. [2021-08-06 15:33:34,552 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6125 transitions. Word has length 30 [2021-08-06 15:33:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:34,552 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 6125 transitions. [2021-08-06 15:33:34,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6125 transitions. [2021-08-06 15:33:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:34,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:34,555 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:34,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-06 15:33:34,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:34,769 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1648276841, now seen corresponding path program 23 times [2021-08-06 15:33:34,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:34,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195897780] [2021-08-06 15:33:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:34,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:34,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:34,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195897780] [2021-08-06 15:33:34,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195897780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:34,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461703025] [2021-08-06 15:33:34,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:34,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:34,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:34,831 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:34,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:33:35,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:33:35,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:35,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:35,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:36,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461703025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:36,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:36,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:33:36,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713100594] [2021-08-06 15:33:36,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:36,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:36,050 INFO L87 Difference]: Start difference. First operand 1830 states and 6125 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:36,928 INFO L93 Difference]: Finished difference Result 4815 states and 14976 transitions. [2021-08-06 15:33:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:33:36,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:36,937 INFO L225 Difference]: With dead ends: 4815 [2021-08-06 15:33:36,937 INFO L226 Difference]: Without dead ends: 4767 [2021-08-06 15:33:36,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:33:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-08-06 15:33:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 1882. [2021-08-06 15:33:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.334928229665072) internal successors, (6273), 1881 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6273 transitions. [2021-08-06 15:33:36,978 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6273 transitions. Word has length 30 [2021-08-06 15:33:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:36,978 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 6273 transitions. [2021-08-06 15:33:36,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6273 transitions. [2021-08-06 15:33:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:36,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:36,981 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:37,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 15:33:37,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 15:33:37,197 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash -102205029, now seen corresponding path program 24 times [2021-08-06 15:33:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:37,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661741509] [2021-08-06 15:33:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:37,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:37,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661741509] [2021-08-06 15:33:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661741509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:37,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903731180] [2021-08-06 15:33:37,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:37,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:37,258 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:37,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:33:38,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:33:38,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:38,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:38,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903731180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:38,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:38,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 15:33:38,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030144338] [2021-08-06 15:33:38,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:38,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:38,479 INFO L87 Difference]: Start difference. First operand 1882 states and 6273 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:39,329 INFO L93 Difference]: Finished difference Result 4941 states and 15164 transitions. [2021-08-06 15:33:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:33:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:39,337 INFO L225 Difference]: With dead ends: 4941 [2021-08-06 15:33:39,337 INFO L226 Difference]: Without dead ends: 4861 [2021-08-06 15:33:39,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 553.9ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:33:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-08-06 15:33:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2178. [2021-08-06 15:33:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 3.3674781809830043) internal successors, (7331), 2177 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 7331 transitions. [2021-08-06 15:33:39,386 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 7331 transitions. Word has length 30 [2021-08-06 15:33:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:39,386 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 7331 transitions. [2021-08-06 15:33:39,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 7331 transitions. [2021-08-06 15:33:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:39,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:39,389 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:39,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:39,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 15:33:39,590 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:39,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:39,590 INFO L82 PathProgramCache]: Analyzing trace with hash 615621547, now seen corresponding path program 25 times [2021-08-06 15:33:39,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:39,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12746355] [2021-08-06 15:33:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:39,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:39,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:39,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12746355] [2021-08-06 15:33:39,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12746355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:39,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104717975] [2021-08-06 15:33:39,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:39,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:39,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:39,655 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:39,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:33:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:40,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104717975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:40,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:40,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 15:33:40,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713235183] [2021-08-06 15:33:40,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:40,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:40,894 INFO L87 Difference]: Start difference. First operand 2178 states and 7331 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:41,777 INFO L93 Difference]: Finished difference Result 6842 states and 21215 transitions. [2021-08-06 15:33:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 15:33:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:41,790 INFO L225 Difference]: With dead ends: 6842 [2021-08-06 15:33:41,790 INFO L226 Difference]: Without dead ends: 6842 [2021-08-06 15:33:41,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:33:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-08-06 15:33:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 2474. [2021-08-06 15:33:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.4488475535786494) internal successors, (8529), 2473 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8529 transitions. [2021-08-06 15:33:41,863 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8529 transitions. Word has length 30 [2021-08-06 15:33:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:41,863 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 8529 transitions. [2021-08-06 15:33:41,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8529 transitions. [2021-08-06 15:33:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:41,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:41,867 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:41,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 15:33:42,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:33:42,067 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash -439755847, now seen corresponding path program 26 times [2021-08-06 15:33:42,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:42,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944178493] [2021-08-06 15:33:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:42,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:42,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:42,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944178493] [2021-08-06 15:33:42,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944178493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:42,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335098695] [2021-08-06 15:33:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:42,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:42,136 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:42,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:33:43,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:43,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:43,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:43,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:43,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335098695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:43,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:43,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 15:33:43,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639874031] [2021-08-06 15:33:43,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:43,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:43,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:43,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:43,445 INFO L87 Difference]: Start difference. First operand 2474 states and 8529 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:44,250 INFO L93 Difference]: Finished difference Result 6641 states and 20706 transitions. [2021-08-06 15:33:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:33:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:44,262 INFO L225 Difference]: With dead ends: 6641 [2021-08-06 15:33:44,262 INFO L226 Difference]: Without dead ends: 6617 [2021-08-06 15:33:44,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:33:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-08-06 15:33:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2462. [2021-08-06 15:33:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.4461600975213327) internal successors, (8481), 2461 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8481 transitions. [2021-08-06 15:33:44,327 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8481 transitions. Word has length 30 [2021-08-06 15:33:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:44,327 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 8481 transitions. [2021-08-06 15:33:44,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8481 transitions. [2021-08-06 15:33:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:44,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:44,330 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:44,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:44,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:44,531 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash 411487407, now seen corresponding path program 27 times [2021-08-06 15:33:44,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:44,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684535102] [2021-08-06 15:33:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:44,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:44,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:44,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684535102] [2021-08-06 15:33:44,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684535102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:44,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12763005] [2021-08-06 15:33:44,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:44,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:44,617 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:44,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:33:45,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:33:45,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:45,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:33:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:33:46,158 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-06 15:33:46,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-06 15:33:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:33:46,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12763005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:46,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:46,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-08-06 15:33:46,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934337995] [2021-08-06 15:33:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:33:46,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:46,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:33:46,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:33:46,463 INFO L87 Difference]: Start difference. First operand 2462 states and 8481 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-08-06 15:33:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:50,539 INFO L93 Difference]: Finished difference Result 7094 states and 21992 transitions. [2021-08-06 15:33:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-08-06 15:33:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 30 [2021-08-06 15:33:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:50,551 INFO L225 Difference]: With dead ends: 7094 [2021-08-06 15:33:50,551 INFO L226 Difference]: Without dead ends: 7094 [2021-08-06 15:33:50,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 3336.1ms TimeCoverageRelationStatistics Valid=2804, Invalid=16656, Unknown=0, NotChecked=0, Total=19460 [2021-08-06 15:33:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-08-06 15:33:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 2546. [2021-08-06 15:33:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4675834970530452) internal successors, (8825), 2545 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8825 transitions. [2021-08-06 15:33:50,617 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8825 transitions. Word has length 30 [2021-08-06 15:33:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:50,617 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 8825 transitions. [2021-08-06 15:33:50,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-08-06 15:33:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8825 transitions. [2021-08-06 15:33:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:50,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:50,621 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:50,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:50,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 15:33:50,829 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash -596085781, now seen corresponding path program 28 times [2021-08-06 15:33:50,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:50,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761042507] [2021-08-06 15:33:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:50,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:50,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:50,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761042507] [2021-08-06 15:33:50,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761042507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:50,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178867628] [2021-08-06 15:33:50,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:50,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:50,881 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:50,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:33:52,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:52,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:52,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:52,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178867628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:52,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:52,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 15:33:52,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319651049] [2021-08-06 15:33:52,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:52,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:52,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:52,314 INFO L87 Difference]: Start difference. First operand 2546 states and 8825 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:53,340 INFO L93 Difference]: Finished difference Result 7653 states and 24222 transitions. [2021-08-06 15:33:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 15:33:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:33:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:53,357 INFO L225 Difference]: With dead ends: 7653 [2021-08-06 15:33:53,358 INFO L226 Difference]: Without dead ends: 7653 [2021-08-06 15:33:53,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 15:33:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-08-06 15:33:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 2551. [2021-08-06 15:33:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 3.4705882352941178) internal successors, (8850), 2550 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 8850 transitions. [2021-08-06 15:33:53,454 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 8850 transitions. Word has length 30 [2021-08-06 15:33:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:53,454 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 8850 transitions. [2021-08-06 15:33:53,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 8850 transitions. [2021-08-06 15:33:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:53,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:53,458 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:53,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:53,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 15:33:53,659 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1716082819, now seen corresponding path program 29 times [2021-08-06 15:33:53,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:53,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135839227] [2021-08-06 15:33:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:53,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:53,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:53,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135839227] [2021-08-06 15:33:53,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135839227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:53,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286387272] [2021-08-06 15:33:53,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:53,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:53,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:53,718 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:53,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:33:54,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:33:54,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:54,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:55,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286387272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:55,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:55,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 15:33:55,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831231] [2021-08-06 15:33:55,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:55,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:55,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:55,031 INFO L87 Difference]: Start difference. First operand 2551 states and 8850 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-08-06 15:33:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:55,859 INFO L93 Difference]: Finished difference Result 6999 states and 21972 transitions. [2021-08-06 15:33:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:33:55,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 30 [2021-08-06 15:33:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:55,872 INFO L225 Difference]: With dead ends: 6999 [2021-08-06 15:33:55,872 INFO L226 Difference]: Without dead ends: 6979 [2021-08-06 15:33:55,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:33:55,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-08-06 15:33:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 2561. [2021-08-06 15:33:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.469140625) internal successors, (8881), 2560 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 8881 transitions. [2021-08-06 15:33:55,936 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 8881 transitions. Word has length 30 [2021-08-06 15:33:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:55,936 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 8881 transitions. [2021-08-06 15:33:55,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-08-06 15:33:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 8881 transitions. [2021-08-06 15:33:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:55,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:55,940 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:55,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:56,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:56,149 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1445573127, now seen corresponding path program 30 times [2021-08-06 15:33:56,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:56,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579094945] [2021-08-06 15:33:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:56,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:56,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:56,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579094945] [2021-08-06 15:33:56,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579094945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:56,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96770431] [2021-08-06 15:33:56,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:56,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:56,201 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:56,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:33:57,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:33:57,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:57,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:57,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96770431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:57,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:57,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 15:33:57,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785863334] [2021-08-06 15:33:57,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:57,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:57,560 INFO L87 Difference]: Start difference. First operand 2561 states and 8881 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-08-06 15:33:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:58,440 INFO L93 Difference]: Finished difference Result 7314 states and 22731 transitions. [2021-08-06 15:33:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 15:33:58,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 30 [2021-08-06 15:33:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:58,453 INFO L225 Difference]: With dead ends: 7314 [2021-08-06 15:33:58,453 INFO L226 Difference]: Without dead ends: 7314 [2021-08-06 15:33:58,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 562.8ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:33:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-08-06 15:33:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 2550. [2021-08-06 15:33:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-08-06 15:33:58,526 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-08-06 15:33:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:58,526 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-08-06 15:33:58,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-08-06 15:33:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-08-06 15:33:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:33:58,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:58,530 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:33:58,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:58,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 15:33:58,745 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash -860544941, now seen corresponding path program 31 times [2021-08-06 15:33:58,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:58,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293330907] [2021-08-06 15:33:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:58,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:58,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:58,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293330907] [2021-08-06 15:33:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293330907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:58,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008669491] [2021-08-06 15:33:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:58,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:58,797 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:58,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:33:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:00,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008669491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:00,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:00,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-08-06 15:34:00,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922397726] [2021-08-06 15:34:00,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:00,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:00,150 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:00,819 INFO L93 Difference]: Finished difference Result 5631 states and 17797 transitions. [2021-08-06 15:34:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:34:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:34:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:00,829 INFO L225 Difference]: With dead ends: 5631 [2021-08-06 15:34:00,830 INFO L226 Difference]: Without dead ends: 5583 [2021-08-06 15:34:00,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:34:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2021-08-06 15:34:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 2564. [2021-08-06 15:34:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.467811158798283) internal successors, (8888), 2563 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 8888 transitions. [2021-08-06 15:34:00,888 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 8888 transitions. Word has length 30 [2021-08-06 15:34:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:00,888 INFO L470 AbstractCegarLoop]: Abstraction has 2564 states and 8888 transitions. [2021-08-06 15:34:00,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 8888 transitions. [2021-08-06 15:34:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:34:00,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:00,892 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:34:00,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:01,093 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:01,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1942417623, now seen corresponding path program 32 times [2021-08-06 15:34:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:01,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449592234] [2021-08-06 15:34:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:01,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:01,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:01,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449592234] [2021-08-06 15:34:01,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449592234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:01,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117537118] [2021-08-06 15:34:01,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:01,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:01,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:01,152 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:01,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:34:02,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:02,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:02,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:02,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117537118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:02,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:02,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-08-06 15:34:02,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386334518] [2021-08-06 15:34:02,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:02,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:02,553 INFO L87 Difference]: Start difference. First operand 2564 states and 8888 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:03,316 INFO L93 Difference]: Finished difference Result 6400 states and 19785 transitions. [2021-08-06 15:34:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:34:03,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:34:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:03,328 INFO L225 Difference]: With dead ends: 6400 [2021-08-06 15:34:03,328 INFO L226 Difference]: Without dead ends: 6384 [2021-08-06 15:34:03,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:34:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-08-06 15:34:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 2642. [2021-08-06 15:34:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2641 states have (on average 3.452101476713366) internal successors, (9117), 2641 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 9117 transitions. [2021-08-06 15:34:03,393 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 9117 transitions. Word has length 30 [2021-08-06 15:34:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:03,393 INFO L470 AbstractCegarLoop]: Abstraction has 2642 states and 9117 transitions. [2021-08-06 15:34:03,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 9117 transitions. [2021-08-06 15:34:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:34:03,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:03,397 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:34:03,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:03,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:03,613 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:03,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2082039981, now seen corresponding path program 33 times [2021-08-06 15:34:03,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:03,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690784985] [2021-08-06 15:34:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:03,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:03,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690784985] [2021-08-06 15:34:03,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690784985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101671904] [2021-08-06 15:34:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:03,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:03,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:03,664 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:03,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:34:04,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:34:04,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:04,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101671904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:05,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:05,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-08-06 15:34:05,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783974806] [2021-08-06 15:34:05,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:05,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:05,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:05,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:05,064 INFO L87 Difference]: Start difference. First operand 2642 states and 9117 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:05,970 INFO L93 Difference]: Finished difference Result 6651 states and 20412 transitions. [2021-08-06 15:34:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 15:34:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 15:34:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:05,983 INFO L225 Difference]: With dead ends: 6651 [2021-08-06 15:34:05,983 INFO L226 Difference]: Without dead ends: 6651 [2021-08-06 15:34:05,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 15:34:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-08-06 15:34:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 2550. [2021-08-06 15:34:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-08-06 15:34:06,049 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-08-06 15:34:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:06,049 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-08-06 15:34:06,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-08-06 15:34:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:34:06,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:06,053 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:34:06,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:06,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 15:34:06,254 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash 186443607, now seen corresponding path program 34 times [2021-08-06 15:34:06,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:06,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918567160] [2021-08-06 15:34:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:06,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:06,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:06,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918567160] [2021-08-06 15:34:06,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918567160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:06,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089540641] [2021-08-06 15:34:06,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:06,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:06,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:06,318 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:34:07,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:07,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089540641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:07,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:07,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:07,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728945230] [2021-08-06 15:34:07,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:07,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:07,675 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:08,505 INFO L93 Difference]: Finished difference Result 6000 states and 18681 transitions. [2021-08-06 15:34:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:34:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:34:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:08,515 INFO L225 Difference]: With dead ends: 6000 [2021-08-06 15:34:08,515 INFO L226 Difference]: Without dead ends: 5912 [2021-08-06 15:34:08,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 522.4ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:34:08,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-08-06 15:34:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2568. [2021-08-06 15:34:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 3.4678613167121153) internal successors, (8902), 2567 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 8902 transitions. [2021-08-06 15:34:08,571 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 8902 transitions. Word has length 30 [2021-08-06 15:34:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:08,571 INFO L470 AbstractCegarLoop]: Abstraction has 2568 states and 8902 transitions. [2021-08-06 15:34:08,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 8902 transitions. [2021-08-06 15:34:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:34:08,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:08,576 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:34:08,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:08,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 15:34:08,776 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash 888973019, now seen corresponding path program 35 times [2021-08-06 15:34:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:08,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933383984] [2021-08-06 15:34:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:08,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:08,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:08,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933383984] [2021-08-06 15:34:08,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933383984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:08,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397088146] [2021-08-06 15:34:08,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:08,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:08,835 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:08,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:34:10,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:34:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397088146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:10,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:10,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:10,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64642571] [2021-08-06 15:34:10,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:10,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:10,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:10,221 INFO L87 Difference]: Start difference. First operand 2568 states and 8902 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:11,059 INFO L93 Difference]: Finished difference Result 6028 states and 18895 transitions. [2021-08-06 15:34:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 15:34:11,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:34:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:11,070 INFO L225 Difference]: With dead ends: 6028 [2021-08-06 15:34:11,070 INFO L226 Difference]: Without dead ends: 5980 [2021-08-06 15:34:11,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:34:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-08-06 15:34:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 2814. [2021-08-06 15:34:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 3.407394241023818) internal successors, (9585), 2813 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 9585 transitions. [2021-08-06 15:34:11,133 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 9585 transitions. Word has length 30 [2021-08-06 15:34:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:11,133 INFO L470 AbstractCegarLoop]: Abstraction has 2814 states and 9585 transitions. [2021-08-06 15:34:11,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 9585 transitions. [2021-08-06 15:34:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:34:11,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:11,138 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:34:11,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:11,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 15:34:11,338 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1658744539, now seen corresponding path program 36 times [2021-08-06 15:34:11,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:11,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747656492] [2021-08-06 15:34:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:11,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:11,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:11,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747656492] [2021-08-06 15:34:11,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747656492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:11,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367760302] [2021-08-06 15:34:11,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:11,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:11,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:11,431 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:11,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:34:12,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:34:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:12,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367760302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:12,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:12,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:12,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546114632] [2021-08-06 15:34:12,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:12,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:12,839 INFO L87 Difference]: Start difference. First operand 2814 states and 9585 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:13,847 INFO L93 Difference]: Finished difference Result 6722 states and 20709 transitions. [2021-08-06 15:34:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 15:34:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:34:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:13,859 INFO L225 Difference]: With dead ends: 6722 [2021-08-06 15:34:13,859 INFO L226 Difference]: Without dead ends: 6710 [2021-08-06 15:34:13,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:34:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-08-06 15:34:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 3090. [2021-08-06 15:34:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.354807381029459) internal successors, (10363), 3089 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 10363 transitions. [2021-08-06 15:34:13,934 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 10363 transitions. Word has length 30 [2021-08-06 15:34:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:13,934 INFO L470 AbstractCegarLoop]: Abstraction has 3090 states and 10363 transitions. [2021-08-06 15:34:13,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 10363 transitions. [2021-08-06 15:34:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 15:34:13,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:13,938 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 15:34:13,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:14,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:14,142 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1929254231, now seen corresponding path program 37 times [2021-08-06 15:34:14,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:14,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505096018] [2021-08-06 15:34:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:14,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:14,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:14,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505096018] [2021-08-06 15:34:14,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505096018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:14,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201113710] [2021-08-06 15:34:14,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:14,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:14,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:14,213 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:14,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:34:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:15,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:15,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:15,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201113710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:15,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:15,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:15,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391057905] [2021-08-06 15:34:15,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:15,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:15,697 INFO L87 Difference]: Start difference. First operand 3090 states and 10363 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:17,048 INFO L93 Difference]: Finished difference Result 7117 states and 21720 transitions. [2021-08-06 15:34:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-06 15:34:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:34:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:17,063 INFO L225 Difference]: With dead ends: 7117 [2021-08-06 15:34:17,063 INFO L226 Difference]: Without dead ends: 7117 [2021-08-06 15:34:17,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 15:34:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2021-08-06 15:34:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 2928. [2021-08-06 15:34:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 3.3850358729074137) internal successors, (9908), 2927 states have internal predecessors, (9908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9908 transitions. [2021-08-06 15:34:17,134 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9908 transitions. Word has length 30 [2021-08-06 15:34:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:17,134 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 9908 transitions. [2021-08-06 15:34:17,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9908 transitions. [2021-08-06 15:34:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:17,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:17,138 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:17,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:17,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 15:34:17,338 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:17,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1305432649, now seen corresponding path program 38 times [2021-08-06 15:34:17,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:17,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389601099] [2021-08-06 15:34:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:17,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:17,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:17,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389601099] [2021-08-06 15:34:17,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389601099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:17,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428298489] [2021-08-06 15:34:17,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:17,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:17,410 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:17,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:34:18,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:18,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:18,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:34:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:18,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428298489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:18,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:18,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:34:18,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304482192] [2021-08-06 15:34:18,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:34:18,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:18,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:34:18,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:18,954 INFO L87 Difference]: Start difference. First operand 2928 states and 9908 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:19,948 INFO L93 Difference]: Finished difference Result 11499 states and 37094 transitions. [2021-08-06 15:34:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:34:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 15:34:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:19,979 INFO L225 Difference]: With dead ends: 11499 [2021-08-06 15:34:19,980 INFO L226 Difference]: Without dead ends: 11499 [2021-08-06 15:34:19,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:34:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2021-08-06 15:34:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 3853. [2021-08-06 15:34:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 3.5983904465212877) internal successors, (13861), 3852 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 13861 transitions. [2021-08-06 15:34:20,106 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 13861 transitions. Word has length 32 [2021-08-06 15:34:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:20,106 INFO L470 AbstractCegarLoop]: Abstraction has 3853 states and 13861 transitions. [2021-08-06 15:34:20,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 13861 transitions. [2021-08-06 15:34:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:20,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:20,111 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:20,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:20,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 15:34:20,312 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:20,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1086535411, now seen corresponding path program 11 times [2021-08-06 15:34:20,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:20,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197151932] [2021-08-06 15:34:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:20,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:20,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:20,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197151932] [2021-08-06 15:34:20,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197151932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:20,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028719338] [2021-08-06 15:34:20,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:20,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:20,384 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:20,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:34:21,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:34:21,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:34:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:21,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028719338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:21,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:21,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:34:21,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689695654] [2021-08-06 15:34:21,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:34:21,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:34:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:21,931 INFO L87 Difference]: Start difference. First operand 3853 states and 13861 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:22,974 INFO L93 Difference]: Finished difference Result 11274 states and 36638 transitions. [2021-08-06 15:34:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:34:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 15:34:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:22,997 INFO L225 Difference]: With dead ends: 11274 [2021-08-06 15:34:22,997 INFO L226 Difference]: Without dead ends: 11274 [2021-08-06 15:34:22,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:34:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-08-06 15:34:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 3659. [2021-08-06 15:34:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-08-06 15:34:23,116 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-08-06 15:34:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:23,116 INFO L470 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-08-06 15:34:23,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-08-06 15:34:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:23,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:23,121 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:23,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:23,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:23,322 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1783634605, now seen corresponding path program 39 times [2021-08-06 15:34:23,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:23,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358712648] [2021-08-06 15:34:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:23,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:23,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:23,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358712648] [2021-08-06 15:34:23,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358712648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:23,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171918120] [2021-08-06 15:34:23,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:23,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:23,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:23,388 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:23,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:34:24,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:34:24,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:24,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:34:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:24,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171918120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:24,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:24,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 15:34:24,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964426189] [2021-08-06 15:34:24,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:34:24,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:34:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:34:24,905 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-08-06 15:34:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:25,440 INFO L93 Difference]: Finished difference Result 9494 states and 30497 transitions. [2021-08-06 15:34:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:34:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 [2021-08-06 15:34:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:25,462 INFO L225 Difference]: With dead ends: 9494 [2021-08-06 15:34:25,462 INFO L226 Difference]: Without dead ends: 9486 [2021-08-06 15:34:25,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:34:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-08-06 15:34:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 3671. [2021-08-06 15:34:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 3.5498637602179834) internal successors, (13028), 3670 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 13028 transitions. [2021-08-06 15:34:25,570 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 13028 transitions. Word has length 32 [2021-08-06 15:34:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:25,570 INFO L470 AbstractCegarLoop]: Abstraction has 3671 states and 13028 transitions. [2021-08-06 15:34:25,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-08-06 15:34:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 13028 transitions. [2021-08-06 15:34:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:25,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:25,576 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:25,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:25,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 15:34:25,776 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:25,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1513124913, now seen corresponding path program 40 times [2021-08-06 15:34:25,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:25,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001067834] [2021-08-06 15:34:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:25,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:25,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:25,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001067834] [2021-08-06 15:34:25,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001067834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:25,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228831539] [2021-08-06 15:34:25,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:25,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:25,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:25,835 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:25,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:34:27,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:27,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:34:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:27,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228831539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:27,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:27,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 15:34:27,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530434379] [2021-08-06 15:34:27,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:34:27,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:34:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:34:27,373 INFO L87 Difference]: Start difference. First operand 3671 states and 13028 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-08-06 15:34:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:28,034 INFO L93 Difference]: Finished difference Result 10005 states and 31855 transitions. [2021-08-06 15:34:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:34:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 [2021-08-06 15:34:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:28,053 INFO L225 Difference]: With dead ends: 10005 [2021-08-06 15:34:28,053 INFO L226 Difference]: Without dead ends: 10005 [2021-08-06 15:34:28,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:34:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-08-06 15:34:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 3659. [2021-08-06 15:34:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-08-06 15:34:28,156 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-08-06 15:34:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:28,156 INFO L470 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-08-06 15:34:28,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2021-08-06 15:34:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-08-06 15:34:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:28,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:28,162 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:28,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:28,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:28,362 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash -375795455, now seen corresponding path program 12 times [2021-08-06 15:34:28,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:28,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191492489] [2021-08-06 15:34:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:28,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:28,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:28,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191492489] [2021-08-06 15:34:28,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191492489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:28,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195399825] [2021-08-06 15:34:28,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:28,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:28,446 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:28,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:34:29,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:34:29,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:29,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:29,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:30,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195399825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:30,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:30,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 15:34:30,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815844508] [2021-08-06 15:34:30,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:34:30,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:34:30,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:34:30,033 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-08-06 15:34:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:31,756 INFO L93 Difference]: Finished difference Result 10824 states and 34873 transitions. [2021-08-06 15:34:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 15:34:31,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 32 [2021-08-06 15:34:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:31,778 INFO L225 Difference]: With dead ends: 10824 [2021-08-06 15:34:31,778 INFO L226 Difference]: Without dead ends: 10824 [2021-08-06 15:34:31,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1081.3ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-08-06 15:34:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-08-06 15:34:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 4026. [2021-08-06 15:34:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.570683229813665) internal successors, (14372), 4025 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14372 transitions. [2021-08-06 15:34:31,894 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14372 transitions. Word has length 32 [2021-08-06 15:34:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:31,894 INFO L470 AbstractCegarLoop]: Abstraction has 4026 states and 14372 transitions. [2021-08-06 15:34:31,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-08-06 15:34:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14372 transitions. [2021-08-06 15:34:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:31,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:31,899 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:31,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:32,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-06 15:34:32,100 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:32,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1527914929, now seen corresponding path program 41 times [2021-08-06 15:34:32,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:32,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145653478] [2021-08-06 15:34:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:32,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:32,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:32,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145653478] [2021-08-06 15:34:32,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145653478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:32,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169891965] [2021-08-06 15:34:32,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:32,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:32,185 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:32,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:34:33,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:34:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:34:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:33,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169891965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:33,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:33,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 15:34:33,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540486175] [2021-08-06 15:34:33,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:34:33,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:34:33,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:34:33,720 INFO L87 Difference]: Start difference. First operand 4026 states and 14372 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2021-08-06 15:34:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:34,712 INFO L93 Difference]: Finished difference Result 11246 states and 36763 transitions. [2021-08-06 15:34:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 15:34:34,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 [2021-08-06 15:34:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:34,754 INFO L225 Difference]: With dead ends: 11246 [2021-08-06 15:34:34,754 INFO L226 Difference]: Without dead ends: 11194 [2021-08-06 15:34:34,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=959, Invalid=3463, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:34:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11194 states. [2021-08-06 15:34:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11194 to 4286. [2021-08-06 15:34:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4285 states have (on average 3.6233372228704783) internal successors, (15526), 4285 states have internal predecessors, (15526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 15526 transitions. [2021-08-06 15:34:34,867 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 15526 transitions. Word has length 32 [2021-08-06 15:34:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:34,867 INFO L470 AbstractCegarLoop]: Abstraction has 4286 states and 15526 transitions. [2021-08-06 15:34:34,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2021-08-06 15:34:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 15526 transitions. [2021-08-06 15:34:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:34,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:34,873 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:34,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:35,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 15:34:35,074 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash 306419889, now seen corresponding path program 42 times [2021-08-06 15:34:35,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:35,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649912491] [2021-08-06 15:34:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:35,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:35,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:35,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649912491] [2021-08-06 15:34:35,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649912491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:35,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512485229] [2021-08-06 15:34:35,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:35,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:35,141 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:35,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:34:36,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:34:36,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:36,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512485229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:36,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:36,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:34:36,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722380205] [2021-08-06 15:34:36,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:36,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:36,744 INFO L87 Difference]: Start difference. First operand 4286 states and 15526 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2021-08-06 15:34:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:38,362 INFO L93 Difference]: Finished difference Result 12174 states and 39242 transitions. [2021-08-06 15:34:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 15:34:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 [2021-08-06 15:34:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:38,392 INFO L225 Difference]: With dead ends: 12174 [2021-08-06 15:34:38,393 INFO L226 Difference]: Without dead ends: 12174 [2021-08-06 15:34:38,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3482 ImplicationChecksByTransitivity, 994.4ms TimeCoverageRelationStatistics Valid=1954, Invalid=7166, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 15:34:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12174 states. [2021-08-06 15:34:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12174 to 4591. [2021-08-06 15:34:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 3.5886710239651416) internal successors, (16472), 4590 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 16472 transitions. [2021-08-06 15:34:38,528 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 16472 transitions. Word has length 32 [2021-08-06 15:34:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:38,529 INFO L470 AbstractCegarLoop]: Abstraction has 4591 states and 16472 transitions. [2021-08-06 15:34:38,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2021-08-06 15:34:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 16472 transitions. [2021-08-06 15:34:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:38,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:38,535 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:38,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:38,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:38,736 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1666610231, now seen corresponding path program 13 times [2021-08-06 15:34:38,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:38,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641205136] [2021-08-06 15:34:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:38,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:38,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:38,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641205136] [2021-08-06 15:34:38,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641205136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:38,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45996202] [2021-08-06 15:34:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:38,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:38,817 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:38,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:34:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:34:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:40,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45996202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:40,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:40,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 15:34:40,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489919875] [2021-08-06 15:34:40,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:40,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:40,465 INFO L87 Difference]: Start difference. First operand 4591 states and 16472 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:41,285 INFO L93 Difference]: Finished difference Result 11987 states and 39069 transitions. [2021-08-06 15:34:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:34:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 15:34:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:41,309 INFO L225 Difference]: With dead ends: 11987 [2021-08-06 15:34:41,309 INFO L226 Difference]: Without dead ends: 11987 [2021-08-06 15:34:41,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=740, Invalid=2016, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:34:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11987 states. [2021-08-06 15:34:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11987 to 4789. [2021-08-06 15:34:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 4788 states have (on average 3.5708020050125313) internal successors, (17097), 4788 states have internal predecessors, (17097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 17097 transitions. [2021-08-06 15:34:41,450 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 17097 transitions. Word has length 32 [2021-08-06 15:34:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:41,450 INFO L470 AbstractCegarLoop]: Abstraction has 4789 states and 17097 transitions. [2021-08-06 15:34:41,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 17097 transitions. [2021-08-06 15:34:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:41,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:41,457 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:41,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:41,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:41,658 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:41,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1572979671, now seen corresponding path program 14 times [2021-08-06 15:34:41,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:41,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173271900] [2021-08-06 15:34:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:41,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:41,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:41,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173271900] [2021-08-06 15:34:41,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173271900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:41,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736114321] [2021-08-06 15:34:41,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:41,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:41,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:41,721 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:41,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:34:43,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:43,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:43,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736114321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:43,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:43,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:34:43,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358214049] [2021-08-06 15:34:43,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:43,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:43,382 INFO L87 Difference]: Start difference. First operand 4789 states and 17097 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2021-08-06 15:34:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:45,063 INFO L93 Difference]: Finished difference Result 12144 states and 39485 transitions. [2021-08-06 15:34:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 15:34:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 [2021-08-06 15:34:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:45,088 INFO L225 Difference]: With dead ends: 12144 [2021-08-06 15:34:45,088 INFO L226 Difference]: Without dead ends: 12140 [2021-08-06 15:34:45,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 1008.1ms TimeCoverageRelationStatistics Valid=1618, Invalid=7124, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 15:34:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12140 states. [2021-08-06 15:34:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12140 to 4818. [2021-08-06 15:34:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5661199916960764) internal successors, (17178), 4817 states have internal predecessors, (17178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17178 transitions. [2021-08-06 15:34:45,257 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17178 transitions. Word has length 32 [2021-08-06 15:34:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:45,257 INFO L470 AbstractCegarLoop]: Abstraction has 4818 states and 17178 transitions. [2021-08-06 15:34:45,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2021-08-06 15:34:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17178 transitions. [2021-08-06 15:34:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:45,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:45,264 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:45,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:45,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:45,474 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:45,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1427042669, now seen corresponding path program 15 times [2021-08-06 15:34:45,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:45,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434587406] [2021-08-06 15:34:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:45,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:45,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:45,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434587406] [2021-08-06 15:34:45,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434587406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:45,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492604507] [2021-08-06 15:34:45,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:45,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:45,549 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:45,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:34:47,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:34:47,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:47,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:34:47,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:47,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492604507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:47,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:47,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 15:34:47,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127674421] [2021-08-06 15:34:47,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:34:47,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:34:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:34:47,257 INFO L87 Difference]: Start difference. First operand 4818 states and 17178 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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) [2021-08-06 15:34:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:48,470 INFO L93 Difference]: Finished difference Result 11157 states and 36755 transitions. [2021-08-06 15:34:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 15:34:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 [2021-08-06 15:34:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:48,495 INFO L225 Difference]: With dead ends: 11157 [2021-08-06 15:34:48,495 INFO L226 Difference]: Without dead ends: 11125 [2021-08-06 15:34:48,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 732.7ms TimeCoverageRelationStatistics Valid=1165, Invalid=4237, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:34:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11125 states. [2021-08-06 15:34:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11125 to 4817. [2021-08-06 15:34:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 3.565406976744186) internal successors, (17171), 4816 states have internal predecessors, (17171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 17171 transitions. [2021-08-06 15:34:48,639 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 17171 transitions. Word has length 32 [2021-08-06 15:34:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:48,639 INFO L470 AbstractCegarLoop]: Abstraction has 4817 states and 17171 transitions. [2021-08-06 15:34:48,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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) [2021-08-06 15:34:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 17171 transitions. [2021-08-06 15:34:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:48,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:48,647 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] [2021-08-06 15:34:48,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:48,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 15:34:48,849 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2070621047, now seen corresponding path program 43 times [2021-08-06 15:34:48,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:48,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386664851] [2021-08-06 15:34:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:48,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:49,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:49,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386664851] [2021-08-06 15:34:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386664851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:49,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845403600] [2021-08-06 15:34:49,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:49,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:49,418 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:49,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:34:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:34:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:51,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:34:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:51,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-08-06 15:34:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:51,351 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-08-06 15:34:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 42 [2021-08-06 15:34:51,678 INFO L354 Elim1Store]: treesize reduction 66, result has 16.5 percent of original size [2021-08-06 15:34:51,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 56 [2021-08-06 15:34:52,016 INFO L354 Elim1Store]: treesize reduction 87, result has 13.0 percent of original size [2021-08-06 15:34:52,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 56 [2021-08-06 15:34:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845403600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:52,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:52,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-06 15:34:52,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009704712] [2021-08-06 15:34:52,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:34:52,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:52,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:34:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:52,264 INFO L87 Difference]: Start difference. First operand 4817 states and 17171 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-08-06 15:34:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:54,788 INFO L93 Difference]: Finished difference Result 6893 states and 23396 transitions. [2021-08-06 15:34:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:34:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 32 [2021-08-06 15:34:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:54,802 INFO L225 Difference]: With dead ends: 6893 [2021-08-06 15:34:54,802 INFO L226 Difference]: Without dead ends: 6484 [2021-08-06 15:34:54,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 2347.1ms TimeCoverageRelationStatistics Valid=593, Invalid=3189, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:34:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6484 states. [2021-08-06 15:34:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6484 to 4925. [2021-08-06 15:34:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4925 states, 4924 states have (on average 3.561941510966694) internal successors, (17539), 4924 states have internal predecessors, (17539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 17539 transitions. [2021-08-06 15:34:54,891 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 17539 transitions. Word has length 32 [2021-08-06 15:34:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:54,891 INFO L470 AbstractCegarLoop]: Abstraction has 4925 states and 17539 transitions. [2021-08-06 15:34:54,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-08-06 15:34:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 17539 transitions. [2021-08-06 15:34:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:34:54,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:54,899 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] [2021-08-06 15:34:54,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:55,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 15:34:55,113 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1410579781, now seen corresponding path program 44 times [2021-08-06 15:34:55,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:55,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253057493] [2021-08-06 15:34:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:55,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:55,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:55,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253057493] [2021-08-06 15:34:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253057493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:55,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118224469] [2021-08-06 15:34:55,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:55,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:55,635 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:55,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:34:57,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:57,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:34:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:57,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:34:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:57,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-08-06 15:34:57,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:57,620 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-08-06 15:34:57,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 42 [2021-08-06 15:34:57,780 INFO L354 Elim1Store]: treesize reduction 66, result has 16.5 percent of original size [2021-08-06 15:34:57,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 53 [2021-08-06 15:34:58,328 INFO L354 Elim1Store]: treesize reduction 87, result has 13.0 percent of original size [2021-08-06 15:34:58,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 56 [2021-08-06 15:34:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:58,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118224469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:58,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:58,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-06 15:34:58,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037230342] [2021-08-06 15:34:58,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:34:58,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:34:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:58,573 INFO L87 Difference]: Start difference. First operand 4925 states and 17539 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-08-06 15:35:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:01,337 INFO L93 Difference]: Finished difference Result 7884 states and 26452 transitions. [2021-08-06 15:35:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:35:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 32 [2021-08-06 15:35:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:01,358 INFO L225 Difference]: With dead ends: 7884 [2021-08-06 15:35:01,358 INFO L226 Difference]: Without dead ends: 7491 [2021-08-06 15:35:01,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2457.5ms TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:35:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7491 states. [2021-08-06 15:35:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7491 to 5206. [2021-08-06 15:35:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5206 states, 5205 states have (on average 3.542747358309318) internal successors, (18440), 5205 states have internal predecessors, (18440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 18440 transitions. [2021-08-06 15:35:01,460 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 18440 transitions. Word has length 32 [2021-08-06 15:35:01,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:01,460 INFO L470 AbstractCegarLoop]: Abstraction has 5206 states and 18440 transitions. [2021-08-06 15:35:01,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-08-06 15:35:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 18440 transitions. [2021-08-06 15:35:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:01,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:01,468 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] [2021-08-06 15:35:01,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 15:35:01,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:01,669 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:01,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1926559423, now seen corresponding path program 45 times [2021-08-06 15:35:01,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:01,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472489248] [2021-08-06 15:35:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:01,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:02,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:02,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472489248] [2021-08-06 15:35:02,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472489248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:02,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271359508] [2021-08-06 15:35:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:02,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:02,323 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:02,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:35:03,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:35:03,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:35:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:04,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:35:04,313 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-06 15:35:04,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2021-08-06 15:35:04,430 INFO L354 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2021-08-06 15:35:04,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2021-08-06 15:35:04,634 INFO L354 Elim1Store]: treesize reduction 82, result has 18.0 percent of original size [2021-08-06 15:35:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2021-08-06 15:35:05,040 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-08-06 15:35:05,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 79 [2021-08-06 15:35:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:05,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271359508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:05,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:05,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-06 15:35:05,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237879111] [2021-08-06 15:35:05,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:35:05,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:35:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:35:05,966 INFO L87 Difference]: Start difference. First operand 5206 states and 18440 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2021-08-06 15:35:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:11,118 INFO L93 Difference]: Finished difference Result 7333 states and 25223 transitions. [2021-08-06 15:35:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:35:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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 32 [2021-08-06 15:35:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:11,133 INFO L225 Difference]: With dead ends: 7333 [2021-08-06 15:35:11,133 INFO L226 Difference]: Without dead ends: 7214 [2021-08-06 15:35:11,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 4339.9ms TimeCoverageRelationStatistics Valid=827, Invalid=4723, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:35:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7214 states. [2021-08-06 15:35:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7214 to 5558. [2021-08-06 15:35:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5557 states have (on average 3.5439985603743027) internal successors, (19694), 5557 states have internal predecessors, (19694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 19694 transitions. [2021-08-06 15:35:11,223 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 19694 transitions. Word has length 32 [2021-08-06 15:35:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:11,223 INFO L470 AbstractCegarLoop]: Abstraction has 5558 states and 19694 transitions. [2021-08-06 15:35:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2021-08-06 15:35:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 19694 transitions. [2021-08-06 15:35:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:11,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:11,231 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] [2021-08-06 15:35:11,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:11,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:11,432 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1646071867, now seen corresponding path program 46 times [2021-08-06 15:35:11,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:11,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371182889] [2021-08-06 15:35:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:11,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:11,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:11,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371182889] [2021-08-06 15:35:11,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371182889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:11,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675000345] [2021-08-06 15:35:11,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:11,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:11,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:11,982 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:11,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:35:13,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:13,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:35:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:13,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:35:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:35:14,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-08-06 15:35:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:35:14,124 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-08-06 15:35:14,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 42 [2021-08-06 15:35:14,252 INFO L354 Elim1Store]: treesize reduction 66, result has 16.5 percent of original size [2021-08-06 15:35:14,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 50 [2021-08-06 15:35:14,427 INFO L354 Elim1Store]: treesize reduction 82, result has 18.0 percent of original size [2021-08-06 15:35:14,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 63 [2021-08-06 15:35:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:15,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675000345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:15,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:15,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:35:15,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98200426] [2021-08-06 15:35:15,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:35:15,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:35:15,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:35:15,100 INFO L87 Difference]: Start difference. First operand 5558 states and 19694 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2021-08-06 15:35:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:21,475 INFO L93 Difference]: Finished difference Result 9684 states and 32419 transitions. [2021-08-06 15:35:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 15:35:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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 32 [2021-08-06 15:35:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:21,494 INFO L225 Difference]: With dead ends: 9684 [2021-08-06 15:35:21,495 INFO L226 Difference]: Without dead ends: 9304 [2021-08-06 15:35:21,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 4950.9ms TimeCoverageRelationStatistics Valid=1229, Invalid=6253, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 15:35:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2021-08-06 15:35:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 5533. [2021-08-06 15:35:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 5532 states have (on average 3.559472161966739) internal successors, (19691), 5532 states have internal predecessors, (19691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 19691 transitions. [2021-08-06 15:35:21,605 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 19691 transitions. Word has length 32 [2021-08-06 15:35:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:21,606 INFO L470 AbstractCegarLoop]: Abstraction has 5533 states and 19691 transitions. [2021-08-06 15:35:21,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2021-08-06 15:35:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 19691 transitions. [2021-08-06 15:35:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:21,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:21,614 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] [2021-08-06 15:35:21,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 15:35:21,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:21,814 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:21,815 INFO L82 PathProgramCache]: Analyzing trace with hash -214060975, now seen corresponding path program 47 times [2021-08-06 15:35:21,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:21,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759381471] [2021-08-06 15:35:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:21,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:22,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:22,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759381471] [2021-08-06 15:35:22,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759381471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:22,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402500094] [2021-08-06 15:35:22,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:22,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:22,382 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:22,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:35:24,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:35:24,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:35:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:24,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:35:24,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-06 15:35:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:35:24,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 15:35:24,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-08-06 15:35:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-08-06 15:35:24,867 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-08-06 15:35:24,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 39 [2021-08-06 15:35:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:25,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402500094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:25,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:25,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:35:25,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188090435] [2021-08-06 15:35:25,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:35:25,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:35:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:35:25,116 INFO L87 Difference]: Start difference. First operand 5533 states and 19691 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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) [2021-08-06 15:35:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:26,804 INFO L93 Difference]: Finished difference Result 8784 states and 30562 transitions. [2021-08-06 15:35:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:35:26,805 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 32 [2021-08-06 15:35:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:26,822 INFO L225 Difference]: With dead ends: 8784 [2021-08-06 15:35:26,822 INFO L226 Difference]: Without dead ends: 8474 [2021-08-06 15:35:26,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1450.0ms TimeCoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:35:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2021-08-06 15:35:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 6855. [2021-08-06 15:35:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 6854 states have (on average 3.54581266413773) internal successors, (24303), 6854 states have internal predecessors, (24303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 24303 transitions. [2021-08-06 15:35:26,953 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 24303 transitions. Word has length 32 [2021-08-06 15:35:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:26,953 INFO L470 AbstractCegarLoop]: Abstraction has 6855 states and 24303 transitions. [2021-08-06 15:35:26,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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) [2021-08-06 15:35:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 24303 transitions. [2021-08-06 15:35:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:26,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:26,965 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] [2021-08-06 15:35:26,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:27,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:27,166 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1124205009, now seen corresponding path program 48 times [2021-08-06 15:35:27,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:27,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163074894] [2021-08-06 15:35:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:27,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:27,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:27,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163074894] [2021-08-06 15:35:27,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163074894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:27,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404443218] [2021-08-06 15:35:27,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:27,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:27,797 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:27,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 15:35:29,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:35:29,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:35:29,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:29,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-08-06 15:35:30,083 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:35:30,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-08-06 15:35:30,304 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:35:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2021-08-06 15:35:30,551 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:35:30,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-08-06 15:35:30,943 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:35:30,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-08-06 15:35:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:31,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404443218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:31,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:31,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 30 [2021-08-06 15:35:31,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305031406] [2021-08-06 15:35:31,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:35:31,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:35:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:35:31,377 INFO L87 Difference]: Start difference. First operand 6855 states and 24303 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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) [2021-08-06 15:35:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:37,083 INFO L93 Difference]: Finished difference Result 10549 states and 35266 transitions. [2021-08-06 15:35:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 15:35:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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 32 [2021-08-06 15:35:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:37,103 INFO L225 Difference]: With dead ends: 10549 [2021-08-06 15:35:37,104 INFO L226 Difference]: Without dead ends: 10228 [2021-08-06 15:35:37,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4624.8ms TimeCoverageRelationStatistics Valid=1309, Invalid=8993, Unknown=0, NotChecked=0, Total=10302 [2021-08-06 15:35:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10228 states. [2021-08-06 15:35:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10228 to 7420. [2021-08-06 15:35:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7420 states, 7419 states have (on average 3.559374578784203) internal successors, (26407), 7419 states have internal predecessors, (26407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7420 states to 7420 states and 26407 transitions. [2021-08-06 15:35:37,292 INFO L78 Accepts]: Start accepts. Automaton has 7420 states and 26407 transitions. Word has length 32 [2021-08-06 15:35:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:37,292 INFO L470 AbstractCegarLoop]: Abstraction has 7420 states and 26407 transitions. [2021-08-06 15:35:37,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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) [2021-08-06 15:35:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7420 states and 26407 transitions. [2021-08-06 15:35:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:37,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:37,304 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] [2021-08-06 15:35:37,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:37,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 15:35:37,505 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1210888401, now seen corresponding path program 49 times [2021-08-06 15:35:37,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:37,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279034942] [2021-08-06 15:35:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:37,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:37,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:37,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279034942] [2021-08-06 15:35:37,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279034942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:37,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680871870] [2021-08-06 15:35:37,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:37,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:37,988 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:37,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 15:35:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:35:39,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:40,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-08-06 15:35:40,327 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:35:40,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-08-06 15:35:40,414 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:35:40,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2021-08-06 15:35:40,601 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-08-06 15:35:40,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2021-08-06 15:35:41,143 INFO L354 Elim1Store]: treesize reduction 77, result has 12.5 percent of original size [2021-08-06 15:35:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 59 [2021-08-06 15:35:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:41,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680871870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:41,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:41,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-08-06 15:35:41,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258155094] [2021-08-06 15:35:41,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:35:41,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:41,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:35:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:35:41,627 INFO L87 Difference]: Start difference. First operand 7420 states and 26407 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-08-06 15:35:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:49,561 INFO L93 Difference]: Finished difference Result 14121 states and 48169 transitions. [2021-08-06 15:35:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:35:49,561 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 32 [2021-08-06 15:35:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:49,590 INFO L225 Difference]: With dead ends: 14121 [2021-08-06 15:35:49,590 INFO L226 Difference]: Without dead ends: 13113 [2021-08-06 15:35:49,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 5470.2ms TimeCoverageRelationStatistics Valid=957, Invalid=4445, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:35:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2021-08-06 15:35:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 9844. [2021-08-06 15:35:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9844 states, 9843 states have (on average 3.570862541907955) internal successors, (35148), 9843 states have internal predecessors, (35148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9844 states to 9844 states and 35148 transitions. [2021-08-06 15:35:49,792 INFO L78 Accepts]: Start accepts. Automaton has 9844 states and 35148 transitions. Word has length 32 [2021-08-06 15:35:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:49,792 INFO L470 AbstractCegarLoop]: Abstraction has 9844 states and 35148 transitions. [2021-08-06 15:35:49,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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) [2021-08-06 15:35:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9844 states and 35148 transitions. [2021-08-06 15:35:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:49,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:49,809 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] [2021-08-06 15:35:49,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:50,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:50,010 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:50,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1267636245, now seen corresponding path program 50 times [2021-08-06 15:35:50,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:50,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163678256] [2021-08-06 15:35:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:50,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:50,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:50,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163678256] [2021-08-06 15:35:50,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163678256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:50,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835082721] [2021-08-06 15:35:50,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:50,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:50,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:50,512 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:50,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 15:35:52,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:52,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:35:52,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:52,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:35:52,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-06 15:35:53,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-08-06 15:35:53,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-08-06 15:35:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:35:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:35:53,336 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:35:53,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 38 [2021-08-06 15:35:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:53,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835082721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:53,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:53,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:35:53,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078108551] [2021-08-06 15:35:53,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:35:53,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:35:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:35:53,559 INFO L87 Difference]: Start difference. First operand 9844 states and 35148 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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) [2021-08-06 15:35:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:54,655 INFO L93 Difference]: Finished difference Result 11035 states and 38780 transitions. [2021-08-06 15:35:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:35:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 32 [2021-08-06 15:35:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:54,679 INFO L225 Difference]: With dead ends: 11035 [2021-08-06 15:35:54,680 INFO L226 Difference]: Without dead ends: 10715 [2021-08-06 15:35:54,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 947.2ms TimeCoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:35:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10715 states. [2021-08-06 15:35:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10715 to 9844. [2021-08-06 15:35:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9844 states, 9843 states have (on average 3.5637508889566187) internal successors, (35078), 9843 states have internal predecessors, (35078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9844 states to 9844 states and 35078 transitions. [2021-08-06 15:35:54,856 INFO L78 Accepts]: Start accepts. Automaton has 9844 states and 35078 transitions. Word has length 32 [2021-08-06 15:35:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:54,856 INFO L470 AbstractCegarLoop]: Abstraction has 9844 states and 35078 transitions. [2021-08-06 15:35:54,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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) [2021-08-06 15:35:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 9844 states and 35078 transitions. [2021-08-06 15:35:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:54,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:54,872 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] [2021-08-06 15:35:54,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:55,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 15:35:55,072 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1953366093, now seen corresponding path program 51 times [2021-08-06 15:35:55,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:55,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701384853] [2021-08-06 15:35:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:55,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:55,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:55,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701384853] [2021-08-06 15:35:55,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701384853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:55,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138430581] [2021-08-06 15:35:55,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:55,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:55,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:55,621 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:55,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 15:35:57,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:35:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:57,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:35:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:57,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:35:57,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-06 15:35:58,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-08-06 15:35:58,074 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-08-06 15:35:58,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 36 [2021-08-06 15:35:58,180 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-08-06 15:35:58,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 46 [2021-08-06 15:35:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:58,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138430581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:58,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:58,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-08-06 15:35:58,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81864582] [2021-08-06 15:35:58,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:35:58,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:35:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:35:58,506 INFO L87 Difference]: Start difference. First operand 9844 states and 35078 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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) [2021-08-06 15:35:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:59,405 INFO L93 Difference]: Finished difference Result 13909 states and 48842 transitions. [2021-08-06 15:35:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:35:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 32 [2021-08-06 15:35:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:59,435 INFO L225 Difference]: With dead ends: 13909 [2021-08-06 15:35:59,435 INFO L226 Difference]: Without dead ends: 13483 [2021-08-06 15:35:59,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 802.1ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:35:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13483 states. [2021-08-06 15:35:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13483 to 8615. [2021-08-06 15:35:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8615 states, 8614 states have (on average 3.5333178546552126) internal successors, (30436), 8614 states have internal predecessors, (30436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8615 states to 8615 states and 30436 transitions. [2021-08-06 15:35:59,604 INFO L78 Accepts]: Start accepts. Automaton has 8615 states and 30436 transitions. Word has length 32 [2021-08-06 15:35:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:59,604 INFO L470 AbstractCegarLoop]: Abstraction has 8615 states and 30436 transitions. [2021-08-06 15:35:59,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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) [2021-08-06 15:35:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 8615 states and 30436 transitions. [2021-08-06 15:35:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:35:59,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:59,617 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] [2021-08-06 15:35:59,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:59,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 15:35:59,818 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash 660647761, now seen corresponding path program 52 times [2021-08-06 15:35:59,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:59,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476761121] [2021-08-06 15:35:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:59,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:00,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:00,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476761121] [2021-08-06 15:36:00,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476761121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:00,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494856966] [2021-08-06 15:36:00,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:36:00,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:00,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:00,289 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:00,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 15:36:02,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:36:02,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:02,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:36:02,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:02,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:36:02,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-06 15:36:02,952 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-08-06 15:36:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 36 [2021-08-06 15:36:03,197 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-08-06 15:36:03,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 47 [2021-08-06 15:36:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:03,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494856966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:03,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:03,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-08-06 15:36:03,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994194363] [2021-08-06 15:36:03,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:36:03,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:36:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:36:03,425 INFO L87 Difference]: Start difference. First operand 8615 states and 30436 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2021-08-06 15:36:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:04,205 INFO L93 Difference]: Finished difference Result 10508 states and 36384 transitions. [2021-08-06 15:36:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:36:04,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 32 [2021-08-06 15:36:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:04,227 INFO L225 Difference]: With dead ends: 10508 [2021-08-06 15:36:04,227 INFO L226 Difference]: Without dead ends: 10198 [2021-08-06 15:36:04,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:36:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-08-06 15:36:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 9015. [2021-08-06 15:36:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 9014 states have (on average 3.5157532726869314) internal successors, (31691), 9014 states have internal predecessors, (31691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 31691 transitions. [2021-08-06 15:36:04,385 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 31691 transitions. Word has length 32 [2021-08-06 15:36:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:04,385 INFO L470 AbstractCegarLoop]: Abstraction has 9015 states and 31691 transitions. [2021-08-06 15:36:04,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2021-08-06 15:36:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 31691 transitions. [2021-08-06 15:36:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 15:36:04,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:04,399 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] [2021-08-06 15:36:04,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 15:36:04,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 15:36:04,605 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1346377609, now seen corresponding path program 53 times [2021-08-06 15:36:04,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:04,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55470866] [2021-08-06 15:36:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:04,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:05,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:05,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55470866] [2021-08-06 15:36:05,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55470866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:05,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037192006] [2021-08-06 15:36:05,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:36:05,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:05,030 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:05,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 15:36:07,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:36:07,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:36:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:07,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:36:07,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-06 15:36:07,623 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-08-06 15:36:07,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 36 [2021-08-06 15:36:07,763 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-08-06 15:36:07,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 54 [2021-08-06 15:36:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:08,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037192006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:08,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:08,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-08-06 15:36:08,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597424909] [2021-08-06 15:36:08,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:36:08,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:08,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:36:08,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:36:08,183 INFO L87 Difference]: Start difference. First operand 9015 states and 31691 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) [2021-08-06 15:36:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:10,021 INFO L93 Difference]: Finished difference Result 16613 states and 56967 transitions. [2021-08-06 15:36:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:36:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 32 [2021-08-06 15:36:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:10,057 INFO L225 Difference]: With dead ends: 16613 [2021-08-06 15:36:10,057 INFO L226 Difference]: Without dead ends: 16071 [2021-08-06 15:36:10,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1162.4ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:36:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16071 states. [2021-08-06 15:36:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16071 to 8861. [2021-08-06 15:36:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8861 states, 8860 states have (on average 3.476523702031603) internal successors, (30802), 8860 states have internal predecessors, (30802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8861 states to 8861 states and 30802 transitions. [2021-08-06 15:36:10,237 INFO L78 Accepts]: Start accepts. Automaton has 8861 states and 30802 transitions. Word has length 32 [2021-08-06 15:36:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:10,238 INFO L470 AbstractCegarLoop]: Abstraction has 8861 states and 30802 transitions. [2021-08-06 15:36:10,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) [2021-08-06 15:36:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8861 states and 30802 transitions. [2021-08-06 15:36:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:10,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:10,251 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:10,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:10,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 15:36:10,452 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1766398907, now seen corresponding path program 54 times [2021-08-06 15:36:10,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:10,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431904784] [2021-08-06 15:36:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:10,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:10,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:10,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431904784] [2021-08-06 15:36:10,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431904784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:10,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220601273] [2021-08-06 15:36:10,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:10,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:10,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:10,545 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:10,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 15:36:12,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:36:12,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:12,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:36:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:36:13,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220601273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:13,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:13,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 15:36:13,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646846296] [2021-08-06 15:36:13,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:36:13,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:13,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:36:13,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:36:13,316 INFO L87 Difference]: Start difference. First operand 8861 states and 30802 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:15,986 INFO L93 Difference]: Finished difference Result 22611 states and 72839 transitions. [2021-08-06 15:36:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-08-06 15:36:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:36:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:16,041 INFO L225 Difference]: With dead ends: 22611 [2021-08-06 15:36:16,042 INFO L226 Difference]: Without dead ends: 22611 [2021-08-06 15:36:16,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6489 ImplicationChecksByTransitivity, 1677.4ms TimeCoverageRelationStatistics Valid=3734, Invalid=12778, Unknown=0, NotChecked=0, Total=16512 [2021-08-06 15:36:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22611 states. [2021-08-06 15:36:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22611 to 9546. [2021-08-06 15:36:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9546 states, 9545 states have (on average 3.521320062860136) internal successors, (33611), 9545 states have internal predecessors, (33611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9546 states to 9546 states and 33611 transitions. [2021-08-06 15:36:16,352 INFO L78 Accepts]: Start accepts. Automaton has 9546 states and 33611 transitions. Word has length 36 [2021-08-06 15:36:16,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:16,352 INFO L470 AbstractCegarLoop]: Abstraction has 9546 states and 33611 transitions. [2021-08-06 15:36:16,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9546 states and 33611 transitions. [2021-08-06 15:36:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:16,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:16,367 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:16,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:16,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:16,568 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1213813107, now seen corresponding path program 55 times [2021-08-06 15:36:16,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:16,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950833351] [2021-08-06 15:36:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:16,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:16,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:16,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950833351] [2021-08-06 15:36:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950833351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:16,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442373338] [2021-08-06 15:36:16,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:36:16,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:16,670 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:16,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 15:36:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:36:18,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:19,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442373338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:19,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:19,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 15:36:19,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225315529] [2021-08-06 15:36:19,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:36:19,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:36:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:36:19,351 INFO L87 Difference]: Start difference. First operand 9546 states and 33611 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:20,752 INFO L93 Difference]: Finished difference Result 22418 states and 73363 transitions. [2021-08-06 15:36:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:36:20,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:36:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:20,798 INFO L225 Difference]: With dead ends: 22418 [2021-08-06 15:36:20,798 INFO L226 Difference]: Without dead ends: 22418 [2021-08-06 15:36:20,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 801.7ms TimeCoverageRelationStatistics Valid=1198, Invalid=4352, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:36:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22418 states. [2021-08-06 15:36:21,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22418 to 9565. [2021-08-06 15:36:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9565 states, 9564 states have (on average 3.517461313258051) internal successors, (33641), 9564 states have internal predecessors, (33641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9565 states to 9565 states and 33641 transitions. [2021-08-06 15:36:21,098 INFO L78 Accepts]: Start accepts. Automaton has 9565 states and 33641 transitions. Word has length 36 [2021-08-06 15:36:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:21,098 INFO L470 AbstractCegarLoop]: Abstraction has 9565 states and 33641 transitions. [2021-08-06 15:36:21,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 9565 states and 33641 transitions. [2021-08-06 15:36:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:21,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:21,112 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:21,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:21,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:21,312 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1198352311, now seen corresponding path program 56 times [2021-08-06 15:36:21,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:21,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623037304] [2021-08-06 15:36:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:21,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:21,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:21,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623037304] [2021-08-06 15:36:21,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623037304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:21,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316404095] [2021-08-06 15:36:21,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:21,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:21,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:21,441 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:21,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 15:36:23,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:36:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:24,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316404095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:24,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:24,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 15:36:24,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824501168] [2021-08-06 15:36:24,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:36:24,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:36:24,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:36:24,111 INFO L87 Difference]: Start difference. First operand 9565 states and 33641 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:25,580 INFO L93 Difference]: Finished difference Result 23044 states and 74201 transitions. [2021-08-06 15:36:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 15:36:25,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:36:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:25,630 INFO L225 Difference]: With dead ends: 23044 [2021-08-06 15:36:25,630 INFO L226 Difference]: Without dead ends: 23044 [2021-08-06 15:36:25,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 909.3ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 15:36:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23044 states. [2021-08-06 15:36:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23044 to 9459. [2021-08-06 15:36:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9458 states have (on average 3.5047578769295833) internal successors, (33148), 9458 states have internal predecessors, (33148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 33148 transitions. [2021-08-06 15:36:25,945 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 33148 transitions. Word has length 36 [2021-08-06 15:36:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:25,945 INFO L470 AbstractCegarLoop]: Abstraction has 9459 states and 33148 transitions. [2021-08-06 15:36:25,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 33148 transitions. [2021-08-06 15:36:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:25,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:25,960 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:25,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:26,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:26,165 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash -50218811, now seen corresponding path program 57 times [2021-08-06 15:36:26,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:26,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069800424] [2021-08-06 15:36:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:26,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:26,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:26,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069800424] [2021-08-06 15:36:26,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069800424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:26,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661108057] [2021-08-06 15:36:26,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:26,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:26,298 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:26,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 15:36:28,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:36:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:36:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:29,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:36:29,116 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:36:29,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-08-06 15:36:29,243 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:36:29,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 39 [2021-08-06 15:36:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-06 15:36:29,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661108057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:29,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:29,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-06 15:36:29,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818239477] [2021-08-06 15:36:29,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:36:29,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:36:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:36:29,551 INFO L87 Difference]: Start difference. First operand 9459 states and 33148 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2021-08-06 15:36:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:35,632 INFO L93 Difference]: Finished difference Result 21729 states and 70751 transitions. [2021-08-06 15:36:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-08-06 15:36:35,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 [2021-08-06 15:36:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:35,677 INFO L225 Difference]: With dead ends: 21729 [2021-08-06 15:36:35,677 INFO L226 Difference]: Without dead ends: 21417 [2021-08-06 15:36:35,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 3986.6ms TimeCoverageRelationStatistics Valid=2965, Invalid=20597, Unknown=0, NotChecked=0, Total=23562 [2021-08-06 15:36:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21417 states. [2021-08-06 15:36:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21417 to 10486. [2021-08-06 15:36:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10486 states, 10485 states have (on average 3.5608011444921317) internal successors, (37335), 10485 states have internal predecessors, (37335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10486 states to 10486 states and 37335 transitions. [2021-08-06 15:36:35,981 INFO L78 Accepts]: Start accepts. Automaton has 10486 states and 37335 transitions. Word has length 36 [2021-08-06 15:36:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:35,981 INFO L470 AbstractCegarLoop]: Abstraction has 10486 states and 37335 transitions. [2021-08-06 15:36:35,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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) [2021-08-06 15:36:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 10486 states and 37335 transitions. [2021-08-06 15:36:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:35,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:35,998 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:36,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 15:36:36,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-06 15:36:36,198 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:36,199 INFO L82 PathProgramCache]: Analyzing trace with hash -704831859, now seen corresponding path program 58 times [2021-08-06 15:36:36,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:36,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971271747] [2021-08-06 15:36:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:36,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:36,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:36,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971271747] [2021-08-06 15:36:36,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971271747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:36,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951616234] [2021-08-06 15:36:36,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:36:36,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:36,297 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:36,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 15:36:38,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:36:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:36:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:39,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951616234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:39,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:39,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-06 15:36:39,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174455079] [2021-08-06 15:36:39,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:36:39,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:39,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:36:39,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:36:39,068 INFO L87 Difference]: Start difference. First operand 10486 states and 37335 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-08-06 15:36:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:40,133 INFO L93 Difference]: Finished difference Result 22243 states and 73649 transitions. [2021-08-06 15:36:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:36:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 [2021-08-06 15:36:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:40,189 INFO L225 Difference]: With dead ends: 22243 [2021-08-06 15:36:40,189 INFO L226 Difference]: Without dead ends: 22243 [2021-08-06 15:36:40,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:36:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22243 states. [2021-08-06 15:36:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22243 to 10468. [2021-08-06 15:36:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 3.5521161746441194) internal successors, (37180), 10467 states have internal predecessors, (37180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 37180 transitions. [2021-08-06 15:36:40,543 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 37180 transitions. Word has length 36 [2021-08-06 15:36:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:40,543 INFO L470 AbstractCegarLoop]: Abstraction has 10468 states and 37180 transitions. [2021-08-06 15:36:40,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-08-06 15:36:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 37180 transitions. [2021-08-06 15:36:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:40,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:40,560 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:40,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:40,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:40,760 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash -153620163, now seen corresponding path program 59 times [2021-08-06 15:36:40,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:40,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936459782] [2021-08-06 15:36:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:40,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:40,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:40,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936459782] [2021-08-06 15:36:40,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936459782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:40,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338498089] [2021-08-06 15:36:40,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:36:40,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:40,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:40,835 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:40,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 15:36:43,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:36:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:36:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:36:43,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338498089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:43,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:43,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:36:43,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093602411] [2021-08-06 15:36:43,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:36:43,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:43,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:36:43,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:36:43,623 INFO L87 Difference]: Start difference. First operand 10468 states and 37180 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:45,905 INFO L93 Difference]: Finished difference Result 23861 states and 78213 transitions. [2021-08-06 15:36:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-06 15:36:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:36:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:45,961 INFO L225 Difference]: With dead ends: 23861 [2021-08-06 15:36:45,961 INFO L226 Difference]: Without dead ends: 23861 [2021-08-06 15:36:45,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4772 ImplicationChecksByTransitivity, 1396.2ms TimeCoverageRelationStatistics Valid=2414, Invalid=10696, Unknown=0, NotChecked=0, Total=13110 [2021-08-06 15:36:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-08-06 15:36:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 10504. [2021-08-06 15:36:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10504 states, 10503 states have (on average 3.5534609159287824) internal successors, (37322), 10503 states have internal predecessors, (37322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10504 states to 10504 states and 37322 transitions. [2021-08-06 15:36:46,362 INFO L78 Accepts]: Start accepts. Automaton has 10504 states and 37322 transitions. Word has length 36 [2021-08-06 15:36:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:46,362 INFO L470 AbstractCegarLoop]: Abstraction has 10504 states and 37322 transitions. [2021-08-06 15:36:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10504 states and 37322 transitions. [2021-08-06 15:36:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:46,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:46,378 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:46,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:46,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:46,579 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:46,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:46,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1809642767, now seen corresponding path program 60 times [2021-08-06 15:36:46,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:46,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168086453] [2021-08-06 15:36:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:46,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:46,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:46,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168086453] [2021-08-06 15:36:46,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168086453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:46,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962361893] [2021-08-06 15:36:46,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:46,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:46,662 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:46,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 15:36:49,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:36:49,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:36:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:36:49,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962361893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:49,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:49,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:36:49,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582229313] [2021-08-06 15:36:49,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:36:49,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:36:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:36:49,560 INFO L87 Difference]: Start difference. First operand 10504 states and 37322 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2021-08-06 15:36:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:51,799 INFO L93 Difference]: Finished difference Result 24161 states and 78933 transitions. [2021-08-06 15:36:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-08-06 15:36:51,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 [2021-08-06 15:36:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:51,856 INFO L225 Difference]: With dead ends: 24161 [2021-08-06 15:36:51,856 INFO L226 Difference]: Without dead ends: 24153 [2021-08-06 15:36:51,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 1301.7ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-08-06 15:36:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24153 states. [2021-08-06 15:36:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24153 to 10456. [2021-08-06 15:36:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10456 states, 10455 states have (on average 3.5486370157819227) internal successors, (37101), 10455 states have internal predecessors, (37101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10456 states to 10456 states and 37101 transitions. [2021-08-06 15:36:52,199 INFO L78 Accepts]: Start accepts. Automaton has 10456 states and 37101 transitions. Word has length 36 [2021-08-06 15:36:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 10456 states and 37101 transitions. [2021-08-06 15:36:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2021-08-06 15:36:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 10456 states and 37101 transitions. [2021-08-06 15:36:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:52,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:52,216 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:52,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:52,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-06 15:36:52,421 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1487695089, now seen corresponding path program 61 times [2021-08-06 15:36:52,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:52,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104765942] [2021-08-06 15:36:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:52,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:52,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:52,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104765942] [2021-08-06 15:36:52,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104765942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:52,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261701274] [2021-08-06 15:36:52,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:36:52,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:52,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:52,494 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:52,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 15:36:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:55,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:36:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:36:55,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261701274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:55,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:55,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:36:55,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824871307] [2021-08-06 15:36:55,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:36:55,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:36:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:36:55,316 INFO L87 Difference]: Start difference. First operand 10456 states and 37101 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2021-08-06 15:36:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:57,922 INFO L93 Difference]: Finished difference Result 27113 states and 88995 transitions. [2021-08-06 15:36:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-06 15:36:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 [2021-08-06 15:36:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:57,989 INFO L225 Difference]: With dead ends: 27113 [2021-08-06 15:36:57,989 INFO L226 Difference]: Without dead ends: 27105 [2021-08-06 15:36:57,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6622 ImplicationChecksByTransitivity, 1610.0ms TimeCoverageRelationStatistics Valid=2942, Invalid=13828, Unknown=0, NotChecked=0, Total=16770 [2021-08-06 15:36:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27105 states. [2021-08-06 15:36:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27105 to 10523. [2021-08-06 15:36:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10523 states, 10522 states have (on average 3.558639042007223) internal successors, (37444), 10522 states have internal predecessors, (37444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10523 states to 10523 states and 37444 transitions. [2021-08-06 15:36:58,444 INFO L78 Accepts]: Start accepts. Automaton has 10523 states and 37444 transitions. Word has length 36 [2021-08-06 15:36:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:58,444 INFO L470 AbstractCegarLoop]: Abstraction has 10523 states and 37444 transitions. [2021-08-06 15:36:58,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2021-08-06 15:36:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10523 states and 37444 transitions. [2021-08-06 15:36:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:36:58,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:58,460 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:58,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 15:36:58,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 15:36:58,661 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash 746109245, now seen corresponding path program 62 times [2021-08-06 15:36:58,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:58,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444288725] [2021-08-06 15:36:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:58,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:58,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:58,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444288725] [2021-08-06 15:36:58,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444288725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:58,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390502750] [2021-08-06 15:36:58,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:58,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:58,750 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:58,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 15:37:01,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:01,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:01,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:37:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:37:01,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390502750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:01,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:01,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-08-06 15:37:01,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530525182] [2021-08-06 15:37:01,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:37:01,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:01,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:37:01,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:37:01,690 INFO L87 Difference]: Start difference. First operand 10523 states and 37444 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:03,761 INFO L93 Difference]: Finished difference Result 23010 states and 75624 transitions. [2021-08-06 15:37:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-08-06 15:37:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:37:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:03,810 INFO L225 Difference]: With dead ends: 23010 [2021-08-06 15:37:03,811 INFO L226 Difference]: Without dead ends: 23010 [2021-08-06 15:37:03,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4994 ImplicationChecksByTransitivity, 1364.7ms TimeCoverageRelationStatistics Valid=2350, Invalid=11222, Unknown=0, NotChecked=0, Total=13572 [2021-08-06 15:37:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23010 states. [2021-08-06 15:37:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23010 to 10673. [2021-08-06 15:37:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10673 states, 10672 states have (on average 3.5505059970014994) internal successors, (37891), 10672 states have internal predecessors, (37891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10673 states to 10673 states and 37891 transitions. [2021-08-06 15:37:04,166 INFO L78 Accepts]: Start accepts. Automaton has 10673 states and 37891 transitions. Word has length 36 [2021-08-06 15:37:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:04,167 INFO L470 AbstractCegarLoop]: Abstraction has 10673 states and 37891 transitions. [2021-08-06 15:37:04,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 10673 states and 37891 transitions. [2021-08-06 15:37:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:04,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:04,184 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:04,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:04,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:04,384 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash -6674613, now seen corresponding path program 63 times [2021-08-06 15:37:04,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:04,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266383337] [2021-08-06 15:37:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:04,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:04,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:04,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266383337] [2021-08-06 15:37:04,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266383337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:04,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651703663] [2021-08-06 15:37:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:37:04,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:04,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:04,465 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:04,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 15:37:07,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:37:07,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:37:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:07,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:37:07,330 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:37:07,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:37:07,492 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:37:07,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-08-06 15:37:07,886 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-08-06 15:37:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 62 [2021-08-06 15:37:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-06 15:37:08,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651703663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:08,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:08,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-08-06 15:37:08,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669683963] [2021-08-06 15:37:08,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:37:08,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:37:08,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:37:08,170 INFO L87 Difference]: Start difference. First operand 10673 states and 37891 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:17,291 INFO L93 Difference]: Finished difference Result 22445 states and 72060 transitions. [2021-08-06 15:37:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-08-06 15:37:17,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:17,340 INFO L225 Difference]: With dead ends: 22445 [2021-08-06 15:37:17,341 INFO L226 Difference]: Without dead ends: 22430 [2021-08-06 15:37:17,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18574 ImplicationChecksByTransitivity, 6653.7ms TimeCoverageRelationStatistics Valid=4827, Invalid=40329, Unknown=0, NotChecked=0, Total=45156 [2021-08-06 15:37:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22430 states. [2021-08-06 15:37:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22430 to 10750. [2021-08-06 15:37:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10750 states, 10749 states have (on average 3.5460042794678577) internal successors, (38116), 10749 states have internal predecessors, (38116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10750 states to 10750 states and 38116 transitions. [2021-08-06 15:37:17,623 INFO L78 Accepts]: Start accepts. Automaton has 10750 states and 38116 transitions. Word has length 36 [2021-08-06 15:37:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:17,623 INFO L470 AbstractCegarLoop]: Abstraction has 10750 states and 38116 transitions. [2021-08-06 15:37:17,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10750 states and 38116 transitions. [2021-08-06 15:37:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:17,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:17,639 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:17,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:17,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:17,840 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1724359225, now seen corresponding path program 64 times [2021-08-06 15:37:17,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:17,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664932988] [2021-08-06 15:37:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:17,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:17,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:17,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664932988] [2021-08-06 15:37:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664932988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:17,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351261825] [2021-08-06 15:37:17,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:17,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:17,920 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:17,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 15:37:20,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:20,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:37:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:37:20,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351261825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:20,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:20,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:37:20,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043726486] [2021-08-06 15:37:20,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:20,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:20,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:20,827 INFO L87 Difference]: Start difference. First operand 10750 states and 38116 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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) [2021-08-06 15:37:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:23,789 INFO L93 Difference]: Finished difference Result 25153 states and 80911 transitions. [2021-08-06 15:37:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-06 15:37:23,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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 [2021-08-06 15:37:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:23,858 INFO L225 Difference]: With dead ends: 25153 [2021-08-06 15:37:23,858 INFO L226 Difference]: Without dead ends: 25145 [2021-08-06 15:37:23,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9579 ImplicationChecksByTransitivity, 2016.5ms TimeCoverageRelationStatistics Valid=4144, Invalid=19418, Unknown=0, NotChecked=0, Total=23562 [2021-08-06 15:37:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25145 states. [2021-08-06 15:37:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25145 to 10898. [2021-08-06 15:37:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10898 states, 10897 states have (on average 3.4980269799027255) internal successors, (38118), 10897 states have internal predecessors, (38118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10898 states to 10898 states and 38118 transitions. [2021-08-06 15:37:24,260 INFO L78 Accepts]: Start accepts. Automaton has 10898 states and 38118 transitions. Word has length 36 [2021-08-06 15:37:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:24,261 INFO L470 AbstractCegarLoop]: Abstraction has 10898 states and 38118 transitions. [2021-08-06 15:37:24,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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) [2021-08-06 15:37:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 10898 states and 38118 transitions. [2021-08-06 15:37:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:24,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:24,278 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:24,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:24,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:24,478 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1849624049, now seen corresponding path program 65 times [2021-08-06 15:37:24,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:24,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248022126] [2021-08-06 15:37:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:24,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:24,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:24,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248022126] [2021-08-06 15:37:24,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248022126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:24,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544290366] [2021-08-06 15:37:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:37:24,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:24,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:24,564 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:24,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 15:37:27,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:37:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:37:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:27,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544290366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:27,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:27,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-08-06 15:37:27,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144141171] [2021-08-06 15:37:27,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:27,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:27,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:27,540 INFO L87 Difference]: Start difference. First operand 10898 states and 38118 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:37:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:28,733 INFO L93 Difference]: Finished difference Result 22185 states and 72760 transitions. [2021-08-06 15:37:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 15:37:28,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 [2021-08-06 15:37:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:28,782 INFO L225 Difference]: With dead ends: 22185 [2021-08-06 15:37:28,782 INFO L226 Difference]: Without dead ends: 22169 [2021-08-06 15:37:28,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 711.8ms TimeCoverageRelationStatistics Valid=1020, Invalid=3402, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:37:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-08-06 15:37:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 11012. [2021-08-06 15:37:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11012 states, 11011 states have (on average 3.4893288529652167) internal successors, (38421), 11011 states have internal predecessors, (38421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11012 states to 11012 states and 38421 transitions. [2021-08-06 15:37:29,164 INFO L78 Accepts]: Start accepts. Automaton has 11012 states and 38421 transitions. Word has length 36 [2021-08-06 15:37:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:29,164 INFO L470 AbstractCegarLoop]: Abstraction has 11012 states and 38421 transitions. [2021-08-06 15:37:29,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:37:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11012 states and 38421 transitions. [2021-08-06 15:37:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:29,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:29,182 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:29,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:29,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:29,383 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:29,383 INFO L82 PathProgramCache]: Analyzing trace with hash -560418107, now seen corresponding path program 66 times [2021-08-06 15:37:29,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:29,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161337012] [2021-08-06 15:37:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:29,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:29,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:29,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161337012] [2021-08-06 15:37:29,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161337012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:29,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126945631] [2021-08-06 15:37:29,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:37:29,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:29,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:29,485 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:29,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 15:37:32,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:37:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:37:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:37:32,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126945631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:32,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:32,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 15:37:32,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061025359] [2021-08-06 15:37:32,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:37:32,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:32,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:37:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:37:32,540 INFO L87 Difference]: Start difference. First operand 11012 states and 38421 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:34,067 INFO L93 Difference]: Finished difference Result 21652 states and 70938 transitions. [2021-08-06 15:37:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 15:37:34,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:34,110 INFO L225 Difference]: With dead ends: 21652 [2021-08-06 15:37:34,110 INFO L226 Difference]: Without dead ends: 21652 [2021-08-06 15:37:34,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 923.4ms TimeCoverageRelationStatistics Valid=1311, Invalid=5829, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:37:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21652 states. [2021-08-06 15:37:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21652 to 11338. [2021-08-06 15:37:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11338 states, 11337 states have (on average 3.4811678574578813) internal successors, (39466), 11337 states have internal predecessors, (39466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11338 states to 11338 states and 39466 transitions. [2021-08-06 15:37:34,468 INFO L78 Accepts]: Start accepts. Automaton has 11338 states and 39466 transitions. Word has length 36 [2021-08-06 15:37:34,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:34,468 INFO L470 AbstractCegarLoop]: Abstraction has 11338 states and 39466 transitions. [2021-08-06 15:37:34,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 11338 states and 39466 transitions. [2021-08-06 15:37:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:34,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:34,484 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:34,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:34,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:34,685 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:34,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1772274811, now seen corresponding path program 67 times [2021-08-06 15:37:34,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:34,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013226268] [2021-08-06 15:37:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:34,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:37:34,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:34,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013226268] [2021-08-06 15:37:34,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013226268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:34,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872568926] [2021-08-06 15:37:34,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:37:34,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:34,757 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:34,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 15:37:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:37,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:37:37,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:37,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872568926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:37,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:37,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 15:37:37,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224813665] [2021-08-06 15:37:37,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:37:37,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:37,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:37:37,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:37:37,892 INFO L87 Difference]: Start difference. First operand 11338 states and 39466 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:38,983 INFO L93 Difference]: Finished difference Result 30512 states and 100904 transitions. [2021-08-06 15:37:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:37:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:39,066 INFO L225 Difference]: With dead ends: 30512 [2021-08-06 15:37:39,066 INFO L226 Difference]: Without dead ends: 30512 [2021-08-06 15:37:39,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:37:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30512 states. [2021-08-06 15:37:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30512 to 11693. [2021-08-06 15:37:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11693 states, 11692 states have (on average 3.5157372562435856) internal successors, (41106), 11692 states have internal predecessors, (41106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11693 states to 11693 states and 41106 transitions. [2021-08-06 15:37:39,585 INFO L78 Accepts]: Start accepts. Automaton has 11693 states and 41106 transitions. Word has length 36 [2021-08-06 15:37:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:39,585 INFO L470 AbstractCegarLoop]: Abstraction has 11693 states and 41106 transitions. [2021-08-06 15:37:39,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 11693 states and 41106 transitions. [2021-08-06 15:37:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:39,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:39,605 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:39,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:39,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-06 15:37:39,805 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1402695447, now seen corresponding path program 68 times [2021-08-06 15:37:39,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:39,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667497217] [2021-08-06 15:37:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:39,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:39,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:39,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667497217] [2021-08-06 15:37:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667497217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:39,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565321640] [2021-08-06 15:37:39,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:37:39,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:39,885 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:39,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 15:37:42,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:37:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:37:42,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565321640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:42,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:42,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:37:42,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5432113] [2021-08-06 15:37:42,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:37:42,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:37:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:37:42,896 INFO L87 Difference]: Start difference. First operand 11693 states and 41106 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2021-08-06 15:37:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:45,049 INFO L93 Difference]: Finished difference Result 29461 states and 96087 transitions. [2021-08-06 15:37:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-06 15:37:45,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 [2021-08-06 15:37:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:45,136 INFO L225 Difference]: With dead ends: 29461 [2021-08-06 15:37:45,136 INFO L226 Difference]: Without dead ends: 29453 [2021-08-06 15:37:45,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 1310.8ms TimeCoverageRelationStatistics Valid=2261, Invalid=10171, Unknown=0, NotChecked=0, Total=12432 [2021-08-06 15:37:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29453 states. [2021-08-06 15:37:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29453 to 11679. [2021-08-06 15:37:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11679 states, 11678 states have (on average 3.5137009761945537) internal successors, (41033), 11678 states have internal predecessors, (41033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11679 states to 11679 states and 41033 transitions. [2021-08-06 15:37:45,593 INFO L78 Accepts]: Start accepts. Automaton has 11679 states and 41033 transitions. Word has length 36 [2021-08-06 15:37:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:45,594 INFO L470 AbstractCegarLoop]: Abstraction has 11679 states and 41033 transitions. [2021-08-06 15:37:45,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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) [2021-08-06 15:37:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 11679 states and 41033 transitions. [2021-08-06 15:37:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:45,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:45,614 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:45,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:45,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:45,814 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:45,815 INFO L82 PathProgramCache]: Analyzing trace with hash -78422771, now seen corresponding path program 69 times [2021-08-06 15:37:45,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:45,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715103479] [2021-08-06 15:37:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:45,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:45,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:45,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715103479] [2021-08-06 15:37:45,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715103479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:45,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716523888] [2021-08-06 15:37:45,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:37:45,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:45,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:45,920 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:45,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 15:37:48,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:37:48,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:48,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:37:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:49,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716523888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:49,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:49,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-08-06 15:37:49,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112038362] [2021-08-06 15:37:49,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:37:49,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:37:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:37:49,100 INFO L87 Difference]: Start difference. First operand 11679 states and 41033 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:37:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:50,457 INFO L93 Difference]: Finished difference Result 28587 states and 92938 transitions. [2021-08-06 15:37:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 15:37:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 [2021-08-06 15:37:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:50,530 INFO L225 Difference]: With dead ends: 28587 [2021-08-06 15:37:50,530 INFO L226 Difference]: Without dead ends: 28587 [2021-08-06 15:37:50,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:37:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28587 states. [2021-08-06 15:37:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28587 to 11789. [2021-08-06 15:37:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 3.5089921954530032) internal successors, (41364), 11788 states have internal predecessors, (41364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 41364 transitions. [2021-08-06 15:37:51,006 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 41364 transitions. Word has length 36 [2021-08-06 15:37:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:51,006 INFO L470 AbstractCegarLoop]: Abstraction has 11789 states and 41364 transitions. [2021-08-06 15:37:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:37:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 41364 transitions. [2021-08-06 15:37:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:51,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:51,024 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:51,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:51,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:51,225 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1133800165, now seen corresponding path program 70 times [2021-08-06 15:37:51,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:51,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951495914] [2021-08-06 15:37:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:51,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:51,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:51,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951495914] [2021-08-06 15:37:51,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951495914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:51,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122534841] [2021-08-06 15:37:51,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:51,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:51,308 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 15:37:54,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:37:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:37:54,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122534841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:54,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:54,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:37:54,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747816117] [2021-08-06 15:37:54,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:54,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:54,386 INFO L87 Difference]: Start difference. First operand 11789 states and 41364 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:37:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:56,781 INFO L93 Difference]: Finished difference Result 27304 states and 89064 transitions. [2021-08-06 15:37:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-06 15:37:56,781 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 [2021-08-06 15:37:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:56,852 INFO L225 Difference]: With dead ends: 27304 [2021-08-06 15:37:56,852 INFO L226 Difference]: Without dead ends: 27296 [2021-08-06 15:37:56,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 1510.2ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-08-06 15:37:56,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27296 states. [2021-08-06 15:37:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27296 to 11466. [2021-08-06 15:37:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11466 states, 11465 states have (on average 3.4966419537723508) internal successors, (40089), 11465 states have internal predecessors, (40089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11466 states to 11466 states and 40089 transitions. [2021-08-06 15:37:57,321 INFO L78 Accepts]: Start accepts. Automaton has 11466 states and 40089 transitions. Word has length 36 [2021-08-06 15:37:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:57,321 INFO L470 AbstractCegarLoop]: Abstraction has 11466 states and 40089 transitions. [2021-08-06 15:37:57,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:37:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11466 states and 40089 transitions. [2021-08-06 15:37:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:37:57,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:57,339 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:57,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 15:37:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:57,540 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:57,540 INFO L82 PathProgramCache]: Analyzing trace with hash -562095695, now seen corresponding path program 71 times [2021-08-06 15:37:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:57,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128074348] [2021-08-06 15:37:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:57,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:57,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:57,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128074348] [2021-08-06 15:37:57,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128074348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:57,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473234262] [2021-08-06 15:37:57,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:37:57,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:57,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:57,618 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:57,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 15:38:00,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:38:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:38:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:00,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473234262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:00,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:00,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-06 15:38:00,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068186523] [2021-08-06 15:38:00,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:38:00,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:38:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:38:00,716 INFO L87 Difference]: Start difference. First operand 11466 states and 40089 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-08-06 15:38:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:02,410 INFO L93 Difference]: Finished difference Result 27528 states and 89465 transitions. [2021-08-06 15:38:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 15:38:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 [2021-08-06 15:38:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:02,473 INFO L225 Difference]: With dead ends: 27528 [2021-08-06 15:38:02,474 INFO L226 Difference]: Without dead ends: 27468 [2021-08-06 15:38:02,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 988.7ms TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2021-08-06 15:38:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27468 states. [2021-08-06 15:38:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27468 to 11476. [2021-08-06 15:38:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11476 states, 11475 states have (on average 3.4962962962962965) internal successors, (40120), 11475 states have internal predecessors, (40120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11476 states to 11476 states and 40120 transitions. [2021-08-06 15:38:02,844 INFO L78 Accepts]: Start accepts. Automaton has 11476 states and 40120 transitions. Word has length 36 [2021-08-06 15:38:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:02,844 INFO L470 AbstractCegarLoop]: Abstraction has 11476 states and 40120 transitions. [2021-08-06 15:38:02,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-08-06 15:38:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11476 states and 40120 transitions. [2021-08-06 15:38:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:02,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:02,861 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:02,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 15:38:03,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:03,062 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:03,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1783590735, now seen corresponding path program 72 times [2021-08-06 15:38:03,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:03,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258184267] [2021-08-06 15:38:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:03,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:03,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:03,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258184267] [2021-08-06 15:38:03,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258184267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:03,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077330126] [2021-08-06 15:38:03,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:38:03,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:03,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:03,140 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:03,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 15:38:05,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:38:05,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:38:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:06,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077330126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:06,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:06,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:38:06,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934344943] [2021-08-06 15:38:06,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:06,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:06,244 INFO L87 Difference]: Start difference. First operand 11476 states and 40120 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:38:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:08,942 INFO L93 Difference]: Finished difference Result 28680 states and 91997 transitions. [2021-08-06 15:38:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-08-06 15:38:08,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 [2021-08-06 15:38:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:09,021 INFO L225 Difference]: With dead ends: 28680 [2021-08-06 15:38:09,021 INFO L226 Difference]: Without dead ends: 28680 [2021-08-06 15:38:09,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7424 ImplicationChecksByTransitivity, 1716.6ms TimeCoverageRelationStatistics Valid=3654, Invalid=14706, Unknown=0, NotChecked=0, Total=18360 [2021-08-06 15:38:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28680 states. [2021-08-06 15:38:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28680 to 11452. [2021-08-06 15:38:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11452 states, 11451 states have (on average 3.494803947253515) internal successors, (40019), 11451 states have internal predecessors, (40019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11452 states to 11452 states and 40019 transitions. [2021-08-06 15:38:09,488 INFO L78 Accepts]: Start accepts. Automaton has 11452 states and 40019 transitions. Word has length 36 [2021-08-06 15:38:09,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:09,489 INFO L470 AbstractCegarLoop]: Abstraction has 11452 states and 40019 transitions. [2021-08-06 15:38:09,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:38:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 11452 states and 40019 transitions. [2021-08-06 15:38:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:09,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:09,507 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:09,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:09,707 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash 539800625, now seen corresponding path program 73 times [2021-08-06 15:38:09,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:09,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056323400] [2021-08-06 15:38:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:09,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:09,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:09,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056323400] [2021-08-06 15:38:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056323400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:09,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349987729] [2021-08-06 15:38:09,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:38:09,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:09,791 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:09,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 15:38:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:38:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:38:12,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349987729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:12,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:12,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:38:12,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507956469] [2021-08-06 15:38:12,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:12,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:12,903 INFO L87 Difference]: Start difference. First operand 11452 states and 40019 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:38:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:16,232 INFO L93 Difference]: Finished difference Result 23973 states and 79413 transitions. [2021-08-06 15:38:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-08-06 15:38:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 [2021-08-06 15:38:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:16,329 INFO L225 Difference]: With dead ends: 23973 [2021-08-06 15:38:16,329 INFO L226 Difference]: Without dead ends: 23941 [2021-08-06 15:38:16,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10148 ImplicationChecksByTransitivity, 2340.5ms TimeCoverageRelationStatistics Valid=3757, Invalid=21683, Unknown=0, NotChecked=0, Total=25440 [2021-08-06 15:38:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23941 states. [2021-08-06 15:38:16,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23941 to 11615. [2021-08-06 15:38:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11615 states, 11614 states have (on average 3.496728086791803) internal successors, (40611), 11614 states have internal predecessors, (40611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11615 states to 11615 states and 40611 transitions. [2021-08-06 15:38:16,651 INFO L78 Accepts]: Start accepts. Automaton has 11615 states and 40611 transitions. Word has length 36 [2021-08-06 15:38:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:16,651 INFO L470 AbstractCegarLoop]: Abstraction has 11615 states and 40611 transitions. [2021-08-06 15:38:16,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:38:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11615 states and 40611 transitions. [2021-08-06 15:38:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:16,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:16,716 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:16,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:16,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 15:38:16,917 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash 149838897, now seen corresponding path program 74 times [2021-08-06 15:38:16,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:16,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913364254] [2021-08-06 15:38:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:16,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:17,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:17,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913364254] [2021-08-06 15:38:17,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913364254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:17,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200257922] [2021-08-06 15:38:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:38:17,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:17,002 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 15:38:19,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:38:19,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:38:19,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:38:20,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200257922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:20,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:20,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:38:20,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003321652] [2021-08-06 15:38:20,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:20,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:20,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:20,140 INFO L87 Difference]: Start difference. First operand 11615 states and 40611 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:38:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:24,016 INFO L93 Difference]: Finished difference Result 29548 states and 96803 transitions. [2021-08-06 15:38:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-08-06 15:38:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 [2021-08-06 15:38:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:24,095 INFO L225 Difference]: With dead ends: 29548 [2021-08-06 15:38:24,095 INFO L226 Difference]: Without dead ends: 29516 [2021-08-06 15:38:24,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13118 ImplicationChecksByTransitivity, 2724.2ms TimeCoverageRelationStatistics Valid=4871, Invalid=27349, Unknown=0, NotChecked=0, Total=32220 [2021-08-06 15:38:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29516 states. [2021-08-06 15:38:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29516 to 11628. [2021-08-06 15:38:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11628 states, 11627 states have (on average 3.498580889309366) internal successors, (40678), 11627 states have internal predecessors, (40678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11628 states to 11628 states and 40678 transitions. [2021-08-06 15:38:24,511 INFO L78 Accepts]: Start accepts. Automaton has 11628 states and 40678 transitions. Word has length 36 [2021-08-06 15:38:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:24,511 INFO L470 AbstractCegarLoop]: Abstraction has 11628 states and 40678 transitions. [2021-08-06 15:38:24,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2021-08-06 15:38:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 11628 states and 40678 transitions. [2021-08-06 15:38:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:24,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:24,529 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:24,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 15:38:24,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:24,729 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:24,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1944895049, now seen corresponding path program 75 times [2021-08-06 15:38:24,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:24,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311107680] [2021-08-06 15:38:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:24,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:24,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311107680] [2021-08-06 15:38:24,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311107680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178716358] [2021-08-06 15:38:24,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:38:24,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:24,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:24,880 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:24,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 15:38:27,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:38:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:38:27,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:27,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178716358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:27,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:27,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-08-06 15:38:27,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192648739] [2021-08-06 15:38:27,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:38:27,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:38:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:38:27,965 INFO L87 Difference]: Start difference. First operand 11628 states and 40678 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:29,443 INFO L93 Difference]: Finished difference Result 23339 states and 77159 transitions. [2021-08-06 15:38:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-06 15:38:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:38:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:29,533 INFO L225 Difference]: With dead ends: 23339 [2021-08-06 15:38:29,533 INFO L226 Difference]: Without dead ends: 23315 [2021-08-06 15:38:29,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3287 ImplicationChecksByTransitivity, 891.8ms TimeCoverageRelationStatistics Valid=1582, Invalid=7160, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 15:38:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23315 states. [2021-08-06 15:38:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23315 to 11855. [2021-08-06 15:38:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11855 states, 11854 states have (on average 3.4845621731061245) internal successors, (41306), 11854 states have internal predecessors, (41306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11855 states to 11855 states and 41306 transitions. [2021-08-06 15:38:29,939 INFO L78 Accepts]: Start accepts. Automaton has 11855 states and 41306 transitions. Word has length 36 [2021-08-06 15:38:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:29,939 INFO L470 AbstractCegarLoop]: Abstraction has 11855 states and 41306 transitions. [2021-08-06 15:38:29,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 11855 states and 41306 transitions. [2021-08-06 15:38:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:29,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:29,958 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:29,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 15:38:30,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:30,158 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:30,158 INFO L82 PathProgramCache]: Analyzing trace with hash 203544009, now seen corresponding path program 76 times [2021-08-06 15:38:30,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:30,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436615736] [2021-08-06 15:38:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:30,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:38:30,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:30,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436615736] [2021-08-06 15:38:30,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436615736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:30,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661208385] [2021-08-06 15:38:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:38:30,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:30,237 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:30,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 15:38:33,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:38:33,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:38:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:33,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661208385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:33,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:33,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-08-06 15:38:33,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821617962] [2021-08-06 15:38:33,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:38:33,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:33,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:38:33,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:38:33,584 INFO L87 Difference]: Start difference. First operand 11855 states and 41306 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2021-08-06 15:38:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:34,927 INFO L93 Difference]: Finished difference Result 33157 states and 108593 transitions. [2021-08-06 15:38:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:38:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 [2021-08-06 15:38:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:35,020 INFO L225 Difference]: With dead ends: 33157 [2021-08-06 15:38:35,020 INFO L226 Difference]: Without dead ends: 33157 [2021-08-06 15:38:35,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 741.7ms TimeCoverageRelationStatistics Valid=1251, Invalid=3719, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:38:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33157 states. [2021-08-06 15:38:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33157 to 11842. [2021-08-06 15:38:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11842 states, 11841 states have (on average 3.482898403851026) internal successors, (41241), 11841 states have internal predecessors, (41241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11842 states to 11842 states and 41241 transitions. [2021-08-06 15:38:35,606 INFO L78 Accepts]: Start accepts. Automaton has 11842 states and 41241 transitions. Word has length 36 [2021-08-06 15:38:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:35,606 INFO L470 AbstractCegarLoop]: Abstraction has 11842 states and 41241 transitions. [2021-08-06 15:38:35,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2021-08-06 15:38:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11842 states and 41241 transitions. [2021-08-06 15:38:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:35,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:35,625 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:35,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:35,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:35,825 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1219340483, now seen corresponding path program 77 times [2021-08-06 15:38:35,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:35,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044622001] [2021-08-06 15:38:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:35,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:35,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044622001] [2021-08-06 15:38:35,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044622001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126785334] [2021-08-06 15:38:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:38:35,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:35,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:35,926 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:35,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 15:38:38,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:38:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:38:38,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:39,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126785334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:39,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:39,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-06 15:38:39,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547089394] [2021-08-06 15:38:39,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:38:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:38:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:38:39,103 INFO L87 Difference]: Start difference. First operand 11842 states and 41241 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-08-06 15:38:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:40,023 INFO L93 Difference]: Finished difference Result 22847 states and 75652 transitions. [2021-08-06 15:38:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:38:40,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 [2021-08-06 15:38:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:40,078 INFO L225 Difference]: With dead ends: 22847 [2021-08-06 15:38:40,078 INFO L226 Difference]: Without dead ends: 22847 [2021-08-06 15:38:40,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=702, Invalid=2378, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:38:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22847 states. [2021-08-06 15:38:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22847 to 12310. [2021-08-06 15:38:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12310 states, 12309 states have (on average 3.4771305548785443) internal successors, (42800), 12309 states have internal predecessors, (42800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12310 states to 12310 states and 42800 transitions. [2021-08-06 15:38:40,431 INFO L78 Accepts]: Start accepts. Automaton has 12310 states and 42800 transitions. Word has length 36 [2021-08-06 15:38:40,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:40,431 INFO L470 AbstractCegarLoop]: Abstraction has 12310 states and 42800 transitions. [2021-08-06 15:38:40,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-08-06 15:38:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 12310 states and 42800 transitions. [2021-08-06 15:38:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:40,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:40,450 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:40,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 15:38:40,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:40,651 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash 810655177, now seen corresponding path program 78 times [2021-08-06 15:38:40,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:40,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847617171] [2021-08-06 15:38:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:40,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:40,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:40,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847617171] [2021-08-06 15:38:40,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847617171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:40,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965006601] [2021-08-06 15:38:40,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:38:40,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:40,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:40,734 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:40,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 15:38:43,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:38:43,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:38:43,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:43,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965006601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:43,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:43,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-08-06 15:38:43,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725065941] [2021-08-06 15:38:43,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:38:43,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:38:43,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:38:43,907 INFO L87 Difference]: Start difference. First operand 12310 states and 42800 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:38:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:44,740 INFO L93 Difference]: Finished difference Result 22632 states and 75232 transitions. [2021-08-06 15:38:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:38:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 [2021-08-06 15:38:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:44,791 INFO L225 Difference]: With dead ends: 22632 [2021-08-06 15:38:44,791 INFO L226 Difference]: Without dead ends: 22632 [2021-08-06 15:38:44,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 488.4ms TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:38:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22632 states. [2021-08-06 15:38:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22632 to 12634. [2021-08-06 15:38:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12634 states, 12633 states have (on average 3.4690097364046544) internal successors, (43824), 12633 states have internal predecessors, (43824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12634 states to 12634 states and 43824 transitions. [2021-08-06 15:38:45,148 INFO L78 Accepts]: Start accepts. Automaton has 12634 states and 43824 transitions. Word has length 36 [2021-08-06 15:38:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:45,148 INFO L470 AbstractCegarLoop]: Abstraction has 12634 states and 43824 transitions. [2021-08-06 15:38:45,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:38:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12634 states and 43824 transitions. [2021-08-06 15:38:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:45,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:45,171 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:45,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:45,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:45,372 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:45,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1841091819, now seen corresponding path program 79 times [2021-08-06 15:38:45,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:45,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320843660] [2021-08-06 15:38:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:45,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:45,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:45,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320843660] [2021-08-06 15:38:45,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320843660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:45,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526065227] [2021-08-06 15:38:45,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:38:45,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:45,462 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:45,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 15:38:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:48,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:38:48,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:48,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526065227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:48,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:48,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-08-06 15:38:48,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346673351] [2021-08-06 15:38:48,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:38:48,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:38:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:38:48,772 INFO L87 Difference]: Start difference. First operand 12634 states and 43824 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:38:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:49,707 INFO L93 Difference]: Finished difference Result 23178 states and 76478 transitions. [2021-08-06 15:38:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:38:49,708 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 [2021-08-06 15:38:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:49,766 INFO L225 Difference]: With dead ends: 23178 [2021-08-06 15:38:49,766 INFO L226 Difference]: Without dead ends: 23178 [2021-08-06 15:38:49,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 487.8ms TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:38:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23178 states. [2021-08-06 15:38:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23178 to 12890. [2021-08-06 15:38:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12890 states, 12889 states have (on average 3.462797734502289) internal successors, (44632), 12889 states have internal predecessors, (44632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12890 states to 12890 states and 44632 transitions. [2021-08-06 15:38:50,166 INFO L78 Accepts]: Start accepts. Automaton has 12890 states and 44632 transitions. Word has length 36 [2021-08-06 15:38:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:50,167 INFO L470 AbstractCegarLoop]: Abstraction has 12890 states and 44632 transitions. [2021-08-06 15:38:50,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:38:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 12890 states and 44632 transitions. [2021-08-06 15:38:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:50,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:50,189 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:50,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:50,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-06 15:38:50,390 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1398498083, now seen corresponding path program 80 times [2021-08-06 15:38:50,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:50,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559488714] [2021-08-06 15:38:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:50,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:38:50,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:50,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559488714] [2021-08-06 15:38:50,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559488714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:50,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843579149] [2021-08-06 15:38:50,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:38:50,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:50,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:50,483 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:50,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 15:38:53,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:38:53,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:38:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:38:53,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843579149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:53,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:53,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:38:53,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132972096] [2021-08-06 15:38:53,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:53,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:53,689 INFO L87 Difference]: Start difference. First operand 12890 states and 44632 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:38:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:55,623 INFO L93 Difference]: Finished difference Result 24049 states and 79079 transitions. [2021-08-06 15:38:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-08-06 15:38:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 [2021-08-06 15:38:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:55,682 INFO L225 Difference]: With dead ends: 24049 [2021-08-06 15:38:55,682 INFO L226 Difference]: Without dead ends: 24045 [2021-08-06 15:38:55,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4855 ImplicationChecksByTransitivity, 1222.9ms TimeCoverageRelationStatistics Valid=2154, Invalid=10502, Unknown=0, NotChecked=0, Total=12656 [2021-08-06 15:38:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24045 states. [2021-08-06 15:38:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24045 to 11412. [2021-08-06 15:38:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11412 states, 11411 states have (on average 3.5126632197002894) internal successors, (40083), 11411 states have internal predecessors, (40083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11412 states to 11412 states and 40083 transitions. [2021-08-06 15:38:56,023 INFO L78 Accepts]: Start accepts. Automaton has 11412 states and 40083 transitions. Word has length 36 [2021-08-06 15:38:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:56,023 INFO L470 AbstractCegarLoop]: Abstraction has 11412 states and 40083 transitions. [2021-08-06 15:38:56,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:38:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 11412 states and 40083 transitions. [2021-08-06 15:38:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:38:56,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:56,040 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:56,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:56,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 15:38:56,241 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -264836201, now seen corresponding path program 81 times [2021-08-06 15:38:56,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:56,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398662082] [2021-08-06 15:38:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:56,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:56,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:56,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398662082] [2021-08-06 15:38:56,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398662082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:56,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217239878] [2021-08-06 15:38:56,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:38:56,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:56,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:56,329 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:56,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 15:38:59,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 15:38:59,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:38:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:59,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217239878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:59,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:59,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-06 15:38:59,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612963000] [2021-08-06 15:38:59,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:59,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:59,590 INFO L87 Difference]: Start difference. First operand 11412 states and 40083 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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) [2021-08-06 15:39:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:01,253 INFO L93 Difference]: Finished difference Result 21199 states and 70725 transitions. [2021-08-06 15:39:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-08-06 15:39:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 [2021-08-06 15:39:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:01,305 INFO L225 Difference]: With dead ends: 21199 [2021-08-06 15:39:01,305 INFO L226 Difference]: Without dead ends: 21163 [2021-08-06 15:39:01,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 1096.5ms TimeCoverageRelationStatistics Valid=1836, Invalid=8876, Unknown=0, NotChecked=0, Total=10712 [2021-08-06 15:39:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21163 states. [2021-08-06 15:39:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21163 to 11001. [2021-08-06 15:39:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11001 states, 11000 states have (on average 3.501818181818182) internal successors, (38520), 11000 states have internal predecessors, (38520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11001 states to 11001 states and 38520 transitions. [2021-08-06 15:39:01,638 INFO L78 Accepts]: Start accepts. Automaton has 11001 states and 38520 transitions. Word has length 36 [2021-08-06 15:39:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:01,638 INFO L470 AbstractCegarLoop]: Abstraction has 11001 states and 38520 transitions. [2021-08-06 15:39:01,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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) [2021-08-06 15:39:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 11001 states and 38520 transitions. [2021-08-06 15:39:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:01,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:01,658 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:01,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:01,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:01,859 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1845290739, now seen corresponding path program 82 times [2021-08-06 15:39:01,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:01,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611431513] [2021-08-06 15:39:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:01,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:01,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611431513] [2021-08-06 15:39:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611431513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085817733] [2021-08-06 15:39:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:39:01,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:01,977 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:02,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 15:39:04,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:39:04,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:04,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:39:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:39:05,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085817733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:05,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:05,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-06 15:39:05,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442550673] [2021-08-06 15:39:05,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:39:05,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:39:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:39:05,189 INFO L87 Difference]: Start difference. First operand 11001 states and 38520 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:06,301 INFO L93 Difference]: Finished difference Result 21808 states and 72158 transitions. [2021-08-06 15:39:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 15:39:06,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:39:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:06,351 INFO L225 Difference]: With dead ends: 21808 [2021-08-06 15:39:06,351 INFO L226 Difference]: Without dead ends: 21708 [2021-08-06 15:39:06,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=1063, Invalid=4339, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:39:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21708 states. [2021-08-06 15:39:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21708 to 11358. [2021-08-06 15:39:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11358 states, 11357 states have (on average 3.464119045522585) internal successors, (39342), 11357 states have internal predecessors, (39342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11358 states to 11358 states and 39342 transitions. [2021-08-06 15:39:06,669 INFO L78 Accepts]: Start accepts. Automaton has 11358 states and 39342 transitions. Word has length 36 [2021-08-06 15:39:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:06,669 INFO L470 AbstractCegarLoop]: Abstraction has 11358 states and 39342 transitions. [2021-08-06 15:39:06,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11358 states and 39342 transitions. [2021-08-06 15:39:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:06,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:06,687 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:06,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:06,888 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash 843328269, now seen corresponding path program 83 times [2021-08-06 15:39:06,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:06,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690187361] [2021-08-06 15:39:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:06,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:06,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:06,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690187361] [2021-08-06 15:39:06,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690187361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:06,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959093710] [2021-08-06 15:39:06,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:39:06,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:06,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:06,989 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:06,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 15:39:09,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 15:39:09,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:09,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:39:09,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:10,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959093710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:10,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:10,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 15:39:10,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652796852] [2021-08-06 15:39:10,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:39:10,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:39:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:39:10,123 INFO L87 Difference]: Start difference. First operand 11358 states and 39342 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:10,735 INFO L93 Difference]: Finished difference Result 21515 states and 70897 transitions. [2021-08-06 15:39:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:39:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:39:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:10,787 INFO L225 Difference]: With dead ends: 21515 [2021-08-06 15:39:10,788 INFO L226 Difference]: Without dead ends: 21515 [2021-08-06 15:39:10,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=476, Invalid=1416, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:39:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21515 states. [2021-08-06 15:39:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21515 to 12079. [2021-08-06 15:39:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12079 states, 12078 states have (on average 3.471518463321742) internal successors, (41929), 12078 states have internal predecessors, (41929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12079 states to 12079 states and 41929 transitions. [2021-08-06 15:39:11,171 INFO L78 Accepts]: Start accepts. Automaton has 12079 states and 41929 transitions. Word has length 36 [2021-08-06 15:39:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:11,171 INFO L470 AbstractCegarLoop]: Abstraction has 12079 states and 41929 transitions. [2021-08-06 15:39:11,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 12079 states and 41929 transitions. [2021-08-06 15:39:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:11,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:11,190 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:11,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:11,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 15:39:11,391 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash 581963917, now seen corresponding path program 84 times [2021-08-06 15:39:11,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:11,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630289716] [2021-08-06 15:39:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:11,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:11,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:11,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630289716] [2021-08-06 15:39:11,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630289716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:11,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869464565] [2021-08-06 15:39:11,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:39:11,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:11,480 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:11,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 15:39:14,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:39:14,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:14,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:39:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:39:14,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869464565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:14,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:14,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-08-06 15:39:14,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166429592] [2021-08-06 15:39:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:39:14,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:39:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:39:14,722 INFO L87 Difference]: Start difference. First operand 12079 states and 41929 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:17,484 INFO L93 Difference]: Finished difference Result 32674 states and 104864 transitions. [2021-08-06 15:39:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-08-06 15:39:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:39:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:17,576 INFO L225 Difference]: With dead ends: 32674 [2021-08-06 15:39:17,576 INFO L226 Difference]: Without dead ends: 32674 [2021-08-06 15:39:17,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7845 ImplicationChecksByTransitivity, 1895.1ms TimeCoverageRelationStatistics Valid=3923, Invalid=15259, Unknown=0, NotChecked=0, Total=19182 [2021-08-06 15:39:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32674 states. [2021-08-06 15:39:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32674 to 13042. [2021-08-06 15:39:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13042 states, 13041 states have (on average 3.496434322521279) internal successors, (45597), 13041 states have internal predecessors, (45597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13042 states to 13042 states and 45597 transitions. [2021-08-06 15:39:18,093 INFO L78 Accepts]: Start accepts. Automaton has 13042 states and 45597 transitions. Word has length 36 [2021-08-06 15:39:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:18,093 INFO L470 AbstractCegarLoop]: Abstraction has 13042 states and 45597 transitions. [2021-08-06 15:39:18,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 13042 states and 45597 transitions. [2021-08-06 15:39:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:18,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:18,115 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:18,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 15:39:18,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:18,316 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1102707169, now seen corresponding path program 85 times [2021-08-06 15:39:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:18,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820453154] [2021-08-06 15:39:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:18,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:18,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:18,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820453154] [2021-08-06 15:39:18,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820453154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:18,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434165559] [2021-08-06 15:39:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:39:18,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:18,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:18,404 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:18,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 15:39:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:21,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:39:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:39:21,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434165559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:21,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:21,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:39:21,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010328511] [2021-08-06 15:39:21,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:39:21,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:39:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:39:21,619 INFO L87 Difference]: Start difference. First operand 13042 states and 45597 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:39:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:23,646 INFO L93 Difference]: Finished difference Result 29568 states and 95920 transitions. [2021-08-06 15:39:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-06 15:39:23,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 [2021-08-06 15:39:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:23,713 INFO L225 Difference]: With dead ends: 29568 [2021-08-06 15:39:23,713 INFO L226 Difference]: Without dead ends: 29468 [2021-08-06 15:39:23,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=2386, Invalid=8956, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 15:39:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29468 states. [2021-08-06 15:39:24,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29468 to 12826. [2021-08-06 15:39:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 12825 states have (on average 3.5051072124756337) internal successors, (44953), 12825 states have internal predecessors, (44953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 44953 transitions. [2021-08-06 15:39:24,145 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 44953 transitions. Word has length 36 [2021-08-06 15:39:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:24,146 INFO L470 AbstractCegarLoop]: Abstraction has 12826 states and 44953 transitions. [2021-08-06 15:39:24,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:39:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 44953 transitions. [2021-08-06 15:39:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:24,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:24,169 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:24,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 15:39:24,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:24,369 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:24,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1739174023, now seen corresponding path program 86 times [2021-08-06 15:39:24,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:24,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863083250] [2021-08-06 15:39:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:24,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:24,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:24,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863083250] [2021-08-06 15:39:24,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863083250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:24,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526674761] [2021-08-06 15:39:24,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:39:24,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:24,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:24,458 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:24,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 15:39:27,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:39:27,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:27,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:39:27,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:39:27,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526674761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:27,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:27,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-06 15:39:27,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092330910] [2021-08-06 15:39:27,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:39:27,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:39:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:39:27,714 INFO L87 Difference]: Start difference. First operand 12826 states and 44953 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:39:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:29,223 INFO L93 Difference]: Finished difference Result 27471 states and 90364 transitions. [2021-08-06 15:39:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 15:39:29,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 [2021-08-06 15:39:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:29,286 INFO L225 Difference]: With dead ends: 27471 [2021-08-06 15:39:29,286 INFO L226 Difference]: Without dead ends: 27363 [2021-08-06 15:39:29,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=1546, Invalid=6110, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 15:39:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27363 states. [2021-08-06 15:39:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27363 to 12816. [2021-08-06 15:39:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12816 states, 12815 states have (on average 3.5049551307062035) internal successors, (44916), 12815 states have internal predecessors, (44916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12816 states to 12816 states and 44916 transitions. [2021-08-06 15:39:29,756 INFO L78 Accepts]: Start accepts. Automaton has 12816 states and 44916 transitions. Word has length 36 [2021-08-06 15:39:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:29,756 INFO L470 AbstractCegarLoop]: Abstraction has 12816 states and 44916 transitions. [2021-08-06 15:39:29,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:39:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 12816 states and 44916 transitions. [2021-08-06 15:39:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:29,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:29,779 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:29,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:29,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 15:39:29,980 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1225481587, now seen corresponding path program 87 times [2021-08-06 15:39:29,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:29,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432866943] [2021-08-06 15:39:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:29,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:39:30,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:30,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432866943] [2021-08-06 15:39:30,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432866943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:30,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090682473] [2021-08-06 15:39:30,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:39:30,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:30,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:30,055 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:30,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 15:39:33,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:39:33,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:39:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090682473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:33,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:33,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 15:39:33,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038387505] [2021-08-06 15:39:33,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:39:33,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:39:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:39:33,394 INFO L87 Difference]: Start difference. First operand 12816 states and 44916 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:39:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:34,265 INFO L93 Difference]: Finished difference Result 31829 states and 105558 transitions. [2021-08-06 15:39:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:39:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 [2021-08-06 15:39:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:34,355 INFO L225 Difference]: With dead ends: 31829 [2021-08-06 15:39:34,355 INFO L226 Difference]: Without dead ends: 31829 [2021-08-06 15:39:34,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=588, Invalid=1574, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:39:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31829 states. [2021-08-06 15:39:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31829 to 12820. [2021-08-06 15:39:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12820 states, 12819 states have (on average 3.5055776581636633) internal successors, (44938), 12819 states have internal predecessors, (44938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12820 states to 12820 states and 44938 transitions. [2021-08-06 15:39:34,850 INFO L78 Accepts]: Start accepts. Automaton has 12820 states and 44938 transitions. Word has length 36 [2021-08-06 15:39:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:34,851 INFO L470 AbstractCegarLoop]: Abstraction has 12820 states and 44938 transitions. [2021-08-06 15:39:34,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:39:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 12820 states and 44938 transitions. [2021-08-06 15:39:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:34,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:34,873 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:34,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 15:39:35,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:39:35,074 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1797453361, now seen corresponding path program 88 times [2021-08-06 15:39:35,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:35,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188383099] [2021-08-06 15:39:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:35,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:35,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:35,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188383099] [2021-08-06 15:39:35,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188383099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:35,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953007109] [2021-08-06 15:39:35,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:39:35,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:35,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:35,153 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:35,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 15:39:38,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:39:38,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:39:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:39:38,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953007109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:38,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:38,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:39:38,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636784340] [2021-08-06 15:39:38,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:39:38,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:38,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:39:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:39:38,445 INFO L87 Difference]: Start difference. First operand 12820 states and 44938 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:39:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:41,690 INFO L93 Difference]: Finished difference Result 33579 states and 108786 transitions. [2021-08-06 15:39:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-08-06 15:39:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 [2021-08-06 15:39:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:41,787 INFO L225 Difference]: With dead ends: 33579 [2021-08-06 15:39:41,788 INFO L226 Difference]: Without dead ends: 33507 [2021-08-06 15:39:41,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11512 ImplicationChecksByTransitivity, 2219.0ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-08-06 15:39:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33507 states. [2021-08-06 15:39:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33507 to 12873. [2021-08-06 15:39:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 12872 states have (on average 3.511497824735861) internal successors, (45200), 12872 states have internal predecessors, (45200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 45200 transitions. [2021-08-06 15:39:42,290 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 45200 transitions. Word has length 36 [2021-08-06 15:39:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:42,290 INFO L470 AbstractCegarLoop]: Abstraction has 12873 states and 45200 transitions. [2021-08-06 15:39:42,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:39:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 45200 transitions. [2021-08-06 15:39:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:42,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:42,312 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:42,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:42,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:42,512 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1450525387, now seen corresponding path program 89 times [2021-08-06 15:39:42,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:42,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166097941] [2021-08-06 15:39:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:42,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:42,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:42,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166097941] [2021-08-06 15:39:42,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166097941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:42,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475365659] [2021-08-06 15:39:42,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:39:42,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:42,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:42,603 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:42,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 15:39:45,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 15:39:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:39:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:39:46,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475365659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:46,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:46,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-06 15:39:46,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445157379] [2021-08-06 15:39:46,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:39:46,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:39:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:39:46,002 INFO L87 Difference]: Start difference. First operand 12873 states and 45200 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-08-06 15:39:47,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:47,523 INFO L93 Difference]: Finished difference Result 28855 states and 94078 transitions. [2021-08-06 15:39:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 15:39:47,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 [2021-08-06 15:39:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:47,599 INFO L225 Difference]: With dead ends: 28855 [2021-08-06 15:39:47,599 INFO L226 Difference]: Without dead ends: 28711 [2021-08-06 15:39:47,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 852.0ms TimeCoverageRelationStatistics Valid=1478, Invalid=6004, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 15:39:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28711 states. [2021-08-06 15:39:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28711 to 12931. [2021-08-06 15:39:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12931 states, 12930 states have (on average 3.508816705336427) internal successors, (45369), 12930 states have internal predecessors, (45369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12931 states to 12931 states and 45369 transitions. [2021-08-06 15:39:48,083 INFO L78 Accepts]: Start accepts. Automaton has 12931 states and 45369 transitions. Word has length 36 [2021-08-06 15:39:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:48,083 INFO L470 AbstractCegarLoop]: Abstraction has 12931 states and 45369 transitions. [2021-08-06 15:39:48,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-08-06 15:39:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 12931 states and 45369 transitions. [2021-08-06 15:39:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:48,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:48,105 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:48,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 15:39:48,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:48,307 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:48,307 INFO L82 PathProgramCache]: Analyzing trace with hash 21775545, now seen corresponding path program 90 times [2021-08-06 15:39:48,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:48,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294435693] [2021-08-06 15:39:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:48,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:48,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:48,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294435693] [2021-08-06 15:39:48,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294435693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:48,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848927177] [2021-08-06 15:39:48,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:39:48,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:48,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:48,392 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:48,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 15:39:51,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:39:51,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:51,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:39:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:39:51,900 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-06 15:39:51,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:39:52,060 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-06 15:39:52,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-08-06 15:39:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:39:52,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848927177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:52,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:52,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 15:39:52,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128310739] [2021-08-06 15:39:52,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:39:52,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:39:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:39:52,308 INFO L87 Difference]: Start difference. First operand 12931 states and 45369 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:55,938 INFO L93 Difference]: Finished difference Result 30160 states and 96352 transitions. [2021-08-06 15:39:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-08-06 15:39:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:39:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:56,013 INFO L225 Difference]: With dead ends: 30160 [2021-08-06 15:39:56,013 INFO L226 Difference]: Without dead ends: 30069 [2021-08-06 15:39:56,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 2659.6ms TimeCoverageRelationStatistics Valid=3080, Invalid=16942, Unknown=0, NotChecked=0, Total=20022 [2021-08-06 15:39:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30069 states. [2021-08-06 15:39:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30069 to 11851. [2021-08-06 15:39:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11851 states, 11850 states have (on average 3.4736708860759493) internal successors, (41163), 11850 states have internal predecessors, (41163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11851 states to 11851 states and 41163 transitions. [2021-08-06 15:39:56,430 INFO L78 Accepts]: Start accepts. Automaton has 11851 states and 41163 transitions. Word has length 36 [2021-08-06 15:39:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:56,430 INFO L470 AbstractCegarLoop]: Abstraction has 11851 states and 41163 transitions. [2021-08-06 15:39:56,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11851 states and 41163 transitions. [2021-08-06 15:39:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:39:56,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:56,448 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:56,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 15:39:56,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 15:39:56,648 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 292285237, now seen corresponding path program 91 times [2021-08-06 15:39:56,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:56,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563339320] [2021-08-06 15:39:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:56,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:56,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:56,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563339320] [2021-08-06 15:39:56,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563339320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:56,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565192324] [2021-08-06 15:39:56,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:39:56,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:56,735 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:56,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 15:39:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:59,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:39:59,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:00,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565192324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:00,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:00,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-08-06 15:40:00,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441554576] [2021-08-06 15:40:00,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:40:00,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:00,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:40:00,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:40:00,157 INFO L87 Difference]: Start difference. First operand 11851 states and 41163 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:01,080 INFO L93 Difference]: Finished difference Result 24576 states and 79701 transitions. [2021-08-06 15:40:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:40:01,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:40:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:01,143 INFO L225 Difference]: With dead ends: 24576 [2021-08-06 15:40:01,143 INFO L226 Difference]: Without dead ends: 24576 [2021-08-06 15:40:01,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 487.0ms TimeCoverageRelationStatistics Valid=791, Invalid=2179, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:40:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24576 states. [2021-08-06 15:40:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24576 to 10365. [2021-08-06 15:40:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10365 states, 10364 states have (on average 3.461694326514859) internal successors, (35877), 10364 states have internal predecessors, (35877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 35877 transitions. [2021-08-06 15:40:01,533 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 35877 transitions. Word has length 36 [2021-08-06 15:40:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:01,533 INFO L470 AbstractCegarLoop]: Abstraction has 10365 states and 35877 transitions. [2021-08-06 15:40:01,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 35877 transitions. [2021-08-06 15:40:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:01,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:01,550 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:01,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:01,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 15:40:01,751 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1876110245, now seen corresponding path program 92 times [2021-08-06 15:40:01,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:01,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581598619] [2021-08-06 15:40:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:01,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:01,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:01,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581598619] [2021-08-06 15:40:01,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581598619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:01,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560553231] [2021-08-06 15:40:01,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:40:01,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:01,832 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:01,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 15:40:04,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:40:04,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:40:04,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:40:05,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560553231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:05,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:05,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:40:05,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106390658] [2021-08-06 15:40:05,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:40:05,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:40:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:40:05,258 INFO L87 Difference]: Start difference. First operand 10365 states and 35877 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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) [2021-08-06 15:40:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:06,783 INFO L93 Difference]: Finished difference Result 21912 states and 71394 transitions. [2021-08-06 15:40:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-06 15:40:06,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 [2021-08-06 15:40:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:06,839 INFO L225 Difference]: With dead ends: 21912 [2021-08-06 15:40:06,839 INFO L226 Difference]: Without dead ends: 21832 [2021-08-06 15:40:06,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 969.2ms TimeCoverageRelationStatistics Valid=1775, Invalid=6415, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 15:40:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21832 states. [2021-08-06 15:40:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21832 to 10359. [2021-08-06 15:40:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10359 states, 10358 states have (on average 3.436956941494497) internal successors, (35600), 10358 states have internal predecessors, (35600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10359 states to 10359 states and 35600 transitions. [2021-08-06 15:40:07,172 INFO L78 Accepts]: Start accepts. Automaton has 10359 states and 35600 transitions. Word has length 36 [2021-08-06 15:40:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:07,172 INFO L470 AbstractCegarLoop]: Abstraction has 10359 states and 35600 transitions. [2021-08-06 15:40:07,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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) [2021-08-06 15:40:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10359 states and 35600 transitions. [2021-08-06 15:40:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:07,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:07,190 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:07,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 15:40:07,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:07,390 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1503692665, now seen corresponding path program 93 times [2021-08-06 15:40:07,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:07,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494999910] [2021-08-06 15:40:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:07,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:07,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:07,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494999910] [2021-08-06 15:40:07,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494999910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:07,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406148546] [2021-08-06 15:40:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:40:07,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:07,486 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:07,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 15:40:10,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 15:40:10,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:40:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:10,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406148546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:10,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:10,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-08-06 15:40:10,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326919710] [2021-08-06 15:40:10,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:40:10,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:40:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:40:10,937 INFO L87 Difference]: Start difference. First operand 10359 states and 35600 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-08-06 15:40:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:12,586 INFO L93 Difference]: Finished difference Result 21436 states and 69663 transitions. [2021-08-06 15:40:12,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-06 15:40:12,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 [2021-08-06 15:40:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:12,633 INFO L225 Difference]: With dead ends: 21436 [2021-08-06 15:40:12,633 INFO L226 Difference]: Without dead ends: 21376 [2021-08-06 15:40:12,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3416 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=1828, Invalid=7484, Unknown=0, NotChecked=0, Total=9312 [2021-08-06 15:40:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21376 states. [2021-08-06 15:40:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21376 to 10467. [2021-08-06 15:40:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.4316835467227214) internal successors, (35916), 10466 states have internal predecessors, (35916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 35916 transitions. [2021-08-06 15:40:12,954 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 35916 transitions. Word has length 36 [2021-08-06 15:40:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:12,954 INFO L470 AbstractCegarLoop]: Abstraction has 10467 states and 35916 transitions. [2021-08-06 15:40:12,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-08-06 15:40:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 35916 transitions. [2021-08-06 15:40:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:12,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:12,972 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:13,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 15:40:13,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:13,172 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:13,172 INFO L82 PathProgramCache]: Analyzing trace with hash -370537971, now seen corresponding path program 94 times [2021-08-06 15:40:13,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:13,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234453513] [2021-08-06 15:40:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:13,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:40:13,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:13,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234453513] [2021-08-06 15:40:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234453513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:13,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238883697] [2021-08-06 15:40:13,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:40:13,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:13,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:13,256 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:13,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 15:40:16,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:40:16,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:16,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:40:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:16,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238883697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:16,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:16,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-08-06 15:40:16,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536184488] [2021-08-06 15:40:16,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:40:16,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:40:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:40:16,774 INFO L87 Difference]: Start difference. First operand 10467 states and 35916 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:17,389 INFO L93 Difference]: Finished difference Result 22565 states and 75123 transitions. [2021-08-06 15:40:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:40:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:40:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:17,443 INFO L225 Difference]: With dead ends: 22565 [2021-08-06 15:40:17,444 INFO L226 Difference]: Without dead ends: 22565 [2021-08-06 15:40:17,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=321, Invalid=939, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:40:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22565 states. [2021-08-06 15:40:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22565 to 10560. [2021-08-06 15:40:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10560 states, 10559 states have (on average 3.442560848565205) internal successors, (36350), 10559 states have internal predecessors, (36350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 36350 transitions. [2021-08-06 15:40:17,791 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 36350 transitions. Word has length 36 [2021-08-06 15:40:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:17,792 INFO L470 AbstractCegarLoop]: Abstraction has 10560 states and 36350 transitions. [2021-08-06 15:40:17,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 36350 transitions. [2021-08-06 15:40:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:17,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:17,808 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:17,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:18,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-06 15:40:18,009 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1759364549, now seen corresponding path program 95 times [2021-08-06 15:40:18,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:18,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312060659] [2021-08-06 15:40:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:18,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:40:18,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:18,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312060659] [2021-08-06 15:40:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312060659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:18,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199152192] [2021-08-06 15:40:18,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:40:18,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:18,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:18,098 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:18,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 15:40:21,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:40:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:40:21,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:21,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199152192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:21,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:21,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-08-06 15:40:21,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048974256] [2021-08-06 15:40:21,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:40:21,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:40:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:40:21,615 INFO L87 Difference]: Start difference. First operand 10560 states and 36350 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:40:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:22,303 INFO L93 Difference]: Finished difference Result 22439 states and 74608 transitions. [2021-08-06 15:40:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:40:22,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 [2021-08-06 15:40:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:22,357 INFO L225 Difference]: With dead ends: 22439 [2021-08-06 15:40:22,357 INFO L226 Difference]: Without dead ends: 22439 [2021-08-06 15:40:22,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:40:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22439 states. [2021-08-06 15:40:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22439 to 10558. [2021-08-06 15:40:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10558 states, 10557 states have (on average 3.442360519086862) internal successors, (36341), 10557 states have internal predecessors, (36341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10558 states to 10558 states and 36341 transitions. [2021-08-06 15:40:22,682 INFO L78 Accepts]: Start accepts. Automaton has 10558 states and 36341 transitions. Word has length 36 [2021-08-06 15:40:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:22,682 INFO L470 AbstractCegarLoop]: Abstraction has 10558 states and 36341 transitions. [2021-08-06 15:40:22,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:40:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10558 states and 36341 transitions. [2021-08-06 15:40:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:22,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:22,699 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:22,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 15:40:22,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 15:40:22,899 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1527562689, now seen corresponding path program 96 times [2021-08-06 15:40:22,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:22,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530254008] [2021-08-06 15:40:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:22,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:40:22,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:22,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530254008] [2021-08-06 15:40:22,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530254008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:22,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335685596] [2021-08-06 15:40:22,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:40:22,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:22,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:22,983 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:22,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 15:40:26,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:40:26,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:26,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:40:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:26,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335685596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:26,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:26,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-08-06 15:40:26,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724723305] [2021-08-06 15:40:26,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:40:26,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:40:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:40:26,495 INFO L87 Difference]: Start difference. First operand 10558 states and 36341 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2021-08-06 15:40:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:27,092 INFO L93 Difference]: Finished difference Result 22036 states and 73024 transitions. [2021-08-06 15:40:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:40:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:40:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:27,161 INFO L225 Difference]: With dead ends: 22036 [2021-08-06 15:40:27,161 INFO L226 Difference]: Without dead ends: 22032 [2021-08-06 15:40:27,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:40:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22032 states. [2021-08-06 15:40:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22032 to 10624. [2021-08-06 15:40:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 3.439141485456086) internal successors, (36534), 10623 states have internal predecessors, (36534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 36534 transitions. [2021-08-06 15:40:27,492 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 36534 transitions. Word has length 36 [2021-08-06 15:40:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:27,492 INFO L470 AbstractCegarLoop]: Abstraction has 10624 states and 36534 transitions. [2021-08-06 15:40:27,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2021-08-06 15:40:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 36534 transitions. [2021-08-06 15:40:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:27,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:27,511 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:27,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:27,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 15:40:27,712 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1876041129, now seen corresponding path program 97 times [2021-08-06 15:40:27,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:27,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478983413] [2021-08-06 15:40:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:27,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:27,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:27,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478983413] [2021-08-06 15:40:27,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478983413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:27,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203611886] [2021-08-06 15:40:27,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:40:27,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:27,795 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:27,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 15:40:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:31,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:40:31,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:40:31,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203611886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:31,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:31,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:40:31,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209104060] [2021-08-06 15:40:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:40:31,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:40:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:40:31,340 INFO L87 Difference]: Start difference. First operand 10624 states and 36534 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:40:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:32,607 INFO L93 Difference]: Finished difference Result 19605 states and 64945 transitions. [2021-08-06 15:40:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 15:40:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 [2021-08-06 15:40:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:32,653 INFO L225 Difference]: With dead ends: 19605 [2021-08-06 15:40:32,653 INFO L226 Difference]: Without dead ends: 19593 [2021-08-06 15:40:32,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=1148, Invalid=4858, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 15:40:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19593 states. [2021-08-06 15:40:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19593 to 10690. [2021-08-06 15:40:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10690 states, 10689 states have (on average 3.4365235288614464) internal successors, (36733), 10689 states have internal predecessors, (36733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 36733 transitions. [2021-08-06 15:40:32,924 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 36733 transitions. Word has length 36 [2021-08-06 15:40:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:32,924 INFO L470 AbstractCegarLoop]: Abstraction has 10690 states and 36733 transitions. [2021-08-06 15:40:32,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:40:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 36733 transitions. [2021-08-06 15:40:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:32,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:32,941 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:32,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:33,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 15:40:33,141 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:33,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1782459313, now seen corresponding path program 98 times [2021-08-06 15:40:33,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:33,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402135893] [2021-08-06 15:40:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:33,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:33,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:33,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402135893] [2021-08-06 15:40:33,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402135893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:33,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961150209] [2021-08-06 15:40:33,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:40:33,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:33,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:33,232 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:33,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 15:40:36,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:40:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:40:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:40:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961150209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:36,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:36,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 15:40:36,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520041185] [2021-08-06 15:40:36,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:40:36,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:40:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:40:36,735 INFO L87 Difference]: Start difference. First operand 10690 states and 36733 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2021-08-06 15:40:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:38,022 INFO L93 Difference]: Finished difference Result 19511 states and 64751 transitions. [2021-08-06 15:40:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 15:40:38,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 [2021-08-06 15:40:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:38,072 INFO L225 Difference]: With dead ends: 19511 [2021-08-06 15:40:38,072 INFO L226 Difference]: Without dead ends: 19475 [2021-08-06 15:40:38,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 778.3ms TimeCoverageRelationStatistics Valid=1259, Invalid=5221, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 15:40:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2021-08-06 15:40:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 10690. [2021-08-06 15:40:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10690 states, 10689 states have (on average 3.435775095892974) internal successors, (36725), 10689 states have internal predecessors, (36725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 36725 transitions. [2021-08-06 15:40:38,333 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 36725 transitions. Word has length 36 [2021-08-06 15:40:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:38,334 INFO L470 AbstractCegarLoop]: Abstraction has 10690 states and 36725 transitions. [2021-08-06 15:40:38,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2021-08-06 15:40:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 36725 transitions. [2021-08-06 15:40:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:38,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:38,351 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:38,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:38,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:38,552 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:38,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1483234491, now seen corresponding path program 99 times [2021-08-06 15:40:38,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:38,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325348801] [2021-08-06 15:40:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:38,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:38,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:38,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325348801] [2021-08-06 15:40:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325348801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:38,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298451694] [2021-08-06 15:40:38,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:40:38,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:38,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:38,636 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:38,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 15:40:41,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:40:41,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:40:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:40:42,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298451694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:42,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:42,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:40:42,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267250805] [2021-08-06 15:40:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:40:42,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:40:42,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:40:42,164 INFO L87 Difference]: Start difference. First operand 10690 states and 36725 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-08-06 15:40:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:42,699 INFO L93 Difference]: Finished difference Result 21102 states and 69083 transitions. [2021-08-06 15:40:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:40:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 [2021-08-06 15:40:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:42,748 INFO L225 Difference]: With dead ends: 21102 [2021-08-06 15:40:42,748 INFO L226 Difference]: Without dead ends: 21102 [2021-08-06 15:40:42,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:40:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21102 states. [2021-08-06 15:40:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21102 to 10635. [2021-08-06 15:40:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10635 states, 10634 states have (on average 3.4322926462290764) internal successors, (36499), 10634 states have internal predecessors, (36499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10635 states to 10635 states and 36499 transitions. [2021-08-06 15:40:43,165 INFO L78 Accepts]: Start accepts. Automaton has 10635 states and 36499 transitions. Word has length 36 [2021-08-06 15:40:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:43,166 INFO L470 AbstractCegarLoop]: Abstraction has 10635 states and 36499 transitions. [2021-08-06 15:40:43,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-08-06 15:40:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 10635 states and 36499 transitions. [2021-08-06 15:40:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:43,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:43,182 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:43,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 15:40:43,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:43,382 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 848897107, now seen corresponding path program 100 times [2021-08-06 15:40:43,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:43,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174505081] [2021-08-06 15:40:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:43,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:43,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:43,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174505081] [2021-08-06 15:40:43,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174505081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:43,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325411353] [2021-08-06 15:40:43,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:40:43,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:43,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:43,464 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:43,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 15:40:46,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:40:46,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:46,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:40:46,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:40:47,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325411353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:47,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:47,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 15:40:47,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425213753] [2021-08-06 15:40:47,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:40:47,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:40:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:40:47,018 INFO L87 Difference]: Start difference. First operand 10635 states and 36499 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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) [2021-08-06 15:40:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:47,493 INFO L93 Difference]: Finished difference Result 20657 states and 67185 transitions. [2021-08-06 15:40:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:40:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:40:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:47,548 INFO L225 Difference]: With dead ends: 20657 [2021-08-06 15:40:47,549 INFO L226 Difference]: Without dead ends: 20657 [2021-08-06 15:40:47,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:40:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20657 states. [2021-08-06 15:40:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20657 to 10648. [2021-08-06 15:40:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10648 states, 10647 states have (on average 3.431858739551047) internal successors, (36539), 10647 states have internal predecessors, (36539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10648 states to 10648 states and 36539 transitions. [2021-08-06 15:40:47,877 INFO L78 Accepts]: Start accepts. Automaton has 10648 states and 36539 transitions. Word has length 36 [2021-08-06 15:40:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:47,878 INFO L470 AbstractCegarLoop]: Abstraction has 10648 states and 36539 transitions. [2021-08-06 15:40:47,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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) [2021-08-06 15:40:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 10648 states and 36539 transitions. [2021-08-06 15:40:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:47,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:47,894 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:47,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 15:40:48,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 15:40:48,095 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:48,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1715036351, now seen corresponding path program 101 times [2021-08-06 15:40:48,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:48,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048069606] [2021-08-06 15:40:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:48,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:48,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:48,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048069606] [2021-08-06 15:40:48,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048069606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:48,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909560931] [2021-08-06 15:40:48,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:40:48,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:48,179 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:48,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 15:40:51,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:40:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:40:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:40:51,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909560931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:51,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:51,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:40:51,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846854077] [2021-08-06 15:40:51,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:40:51,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:40:51,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:40:51,773 INFO L87 Difference]: Start difference. First operand 10648 states and 36539 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:40:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:53,226 INFO L93 Difference]: Finished difference Result 23420 states and 74917 transitions. [2021-08-06 15:40:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 15:40:53,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 [2021-08-06 15:40:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:53,276 INFO L225 Difference]: With dead ends: 23420 [2021-08-06 15:40:53,276 INFO L226 Difference]: Without dead ends: 23412 [2021-08-06 15:40:53,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 15:40:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23412 states. [2021-08-06 15:40:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23412 to 10737. [2021-08-06 15:40:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10737 states, 10736 states have (on average 3.423155737704918) internal successors, (36751), 10736 states have internal predecessors, (36751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10737 states to 10737 states and 36751 transitions. [2021-08-06 15:40:53,642 INFO L78 Accepts]: Start accepts. Automaton has 10737 states and 36751 transitions. Word has length 36 [2021-08-06 15:40:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:53,642 INFO L470 AbstractCegarLoop]: Abstraction has 10737 states and 36751 transitions. [2021-08-06 15:40:53,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:40:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10737 states and 36751 transitions. [2021-08-06 15:40:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:53,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:53,658 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:53,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:53,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:53,859 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:53,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1806847809, now seen corresponding path program 102 times [2021-08-06 15:40:53,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:53,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637001651] [2021-08-06 15:40:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:53,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:53,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637001651] [2021-08-06 15:40:53,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637001651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995675787] [2021-08-06 15:40:53,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:40:53,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:53,941 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:53,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 15:40:57,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:40:57,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:57,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:40:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 15:40:57,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995675787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:57,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:57,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-08-06 15:40:57,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007497588] [2021-08-06 15:40:57,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:40:57,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:40:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:40:57,520 INFO L87 Difference]: Start difference. First operand 10737 states and 36751 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) [2021-08-06 15:40:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:58,396 INFO L93 Difference]: Finished difference Result 23337 states and 75406 transitions. [2021-08-06 15:40:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:40:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:40:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:58,451 INFO L225 Difference]: With dead ends: 23337 [2021-08-06 15:40:58,451 INFO L226 Difference]: Without dead ends: 23297 [2021-08-06 15:40:58,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:40:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23297 states. [2021-08-06 15:40:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23297 to 11155. [2021-08-06 15:40:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11154 states have (on average 3.3944773175542404) internal successors, (37862), 11154 states have internal predecessors, (37862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 37862 transitions. [2021-08-06 15:40:58,819 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 37862 transitions. Word has length 36 [2021-08-06 15:40:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:58,819 INFO L470 AbstractCegarLoop]: Abstraction has 11155 states and 37862 transitions. [2021-08-06 15:40:58,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) [2021-08-06 15:40:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 37862 transitions. [2021-08-06 15:40:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:40:58,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:58,837 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:58,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:59,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:59,037 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:59,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1357679665, now seen corresponding path program 103 times [2021-08-06 15:40:59,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:59,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831740209] [2021-08-06 15:40:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:59,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:59,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:59,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831740209] [2021-08-06 15:40:59,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831740209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:59,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740487620] [2021-08-06 15:40:59,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:40:59,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:59,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:59,145 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:59,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 15:41:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:41:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:41:02,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740487620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:02,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:02,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-08-06 15:41:02,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464341285] [2021-08-06 15:41:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:41:02,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:41:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:41:02,808 INFO L87 Difference]: Start difference. First operand 11155 states and 37862 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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) [2021-08-06 15:41:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:03,487 INFO L93 Difference]: Finished difference Result 23802 states and 75860 transitions. [2021-08-06 15:41:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:41:03,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:41:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:03,541 INFO L225 Difference]: With dead ends: 23802 [2021-08-06 15:41:03,541 INFO L226 Difference]: Without dead ends: 23802 [2021-08-06 15:41:03,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:41:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23802 states. [2021-08-06 15:41:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23802 to 11973. [2021-08-06 15:41:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11973 states, 11972 states have (on average 3.398012028065486) internal successors, (40681), 11972 states have internal predecessors, (40681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11973 states to 11973 states and 40681 transitions. [2021-08-06 15:41:03,895 INFO L78 Accepts]: Start accepts. Automaton has 11973 states and 40681 transitions. Word has length 36 [2021-08-06 15:41:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:03,895 INFO L470 AbstractCegarLoop]: Abstraction has 11973 states and 40681 transitions. [2021-08-06 15:41:03,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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) [2021-08-06 15:41:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 11973 states and 40681 transitions. [2021-08-06 15:41:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:03,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:03,913 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:03,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:04,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-06 15:41:04,114 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1511139571, now seen corresponding path program 104 times [2021-08-06 15:41:04,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:04,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409118021] [2021-08-06 15:41:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:04,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:41:04,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:04,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409118021] [2021-08-06 15:41:04,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409118021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:04,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019539919] [2021-08-06 15:41:04,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:41:04,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:04,206 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:04,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 15:41:07,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:41:07,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:07,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:41:07,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:41:07,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019539919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:07,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:07,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-08-06 15:41:07,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786247165] [2021-08-06 15:41:07,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:41:07,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:41:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:41:07,845 INFO L87 Difference]: Start difference. First operand 11973 states and 40681 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2021-08-06 15:41:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:08,902 INFO L93 Difference]: Finished difference Result 23667 states and 76331 transitions. [2021-08-06 15:41:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 15:41:08,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:41:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:08,956 INFO L225 Difference]: With dead ends: 23667 [2021-08-06 15:41:08,956 INFO L226 Difference]: Without dead ends: 23571 [2021-08-06 15:41:08,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=990, Invalid=3840, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 15:41:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23571 states. [2021-08-06 15:41:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23571 to 11961. [2021-08-06 15:41:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11961 states, 11960 states have (on average 3.3866220735785952) internal successors, (40504), 11960 states have internal predecessors, (40504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11961 states to 11961 states and 40504 transitions. [2021-08-06 15:41:09,332 INFO L78 Accepts]: Start accepts. Automaton has 11961 states and 40504 transitions. Word has length 36 [2021-08-06 15:41:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:09,333 INFO L470 AbstractCegarLoop]: Abstraction has 11961 states and 40504 transitions. [2021-08-06 15:41:09,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2021-08-06 15:41:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11961 states and 40504 transitions. [2021-08-06 15:41:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:09,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:09,350 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:09,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 15:41:09,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:09,551 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:09,551 INFO L82 PathProgramCache]: Analyzing trace with hash -867342283, now seen corresponding path program 105 times [2021-08-06 15:41:09,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:09,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837954047] [2021-08-06 15:41:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:09,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:09,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:09,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837954047] [2021-08-06 15:41:09,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837954047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:09,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788243769] [2021-08-06 15:41:09,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:41:09,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:09,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:09,647 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:09,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 15:41:13,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:41:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:41:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:13,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788243769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:13,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:13,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-08-06 15:41:13,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309055083] [2021-08-06 15:41:13,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:41:13,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:13,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:41:13,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:41:13,283 INFO L87 Difference]: Start difference. First operand 11961 states and 40504 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:14,141 INFO L93 Difference]: Finished difference Result 23467 states and 74931 transitions. [2021-08-06 15:41:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:41:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:41:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:14,195 INFO L225 Difference]: With dead ends: 23467 [2021-08-06 15:41:14,196 INFO L226 Difference]: Without dead ends: 23467 [2021-08-06 15:41:14,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:41:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23467 states. [2021-08-06 15:41:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23467 to 12547. [2021-08-06 15:41:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12547 states, 12546 states have (on average 3.366571018651363) internal successors, (42237), 12546 states have internal predecessors, (42237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12547 states to 12547 states and 42237 transitions. [2021-08-06 15:41:14,598 INFO L78 Accepts]: Start accepts. Automaton has 12547 states and 42237 transitions. Word has length 36 [2021-08-06 15:41:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:14,598 INFO L470 AbstractCegarLoop]: Abstraction has 12547 states and 42237 transitions. [2021-08-06 15:41:14,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 12547 states and 42237 transitions. [2021-08-06 15:41:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:14,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:14,619 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:14,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:14,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:14,819 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:14,819 INFO L82 PathProgramCache]: Analyzing trace with hash 863691555, now seen corresponding path program 106 times [2021-08-06 15:41:14,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:14,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219153345] [2021-08-06 15:41:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:14,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:14,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:14,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219153345] [2021-08-06 15:41:14,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219153345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:14,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209212705] [2021-08-06 15:41:14,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:41:14,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:14,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:14,910 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:14,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 15:41:18,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:41:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:18,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:41:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:41:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209212705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:18,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:18,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-08-06 15:41:18,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604773619] [2021-08-06 15:41:18,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:41:18,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:41:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:41:18,625 INFO L87 Difference]: Start difference. First operand 12547 states and 42237 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:41:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:20,394 INFO L93 Difference]: Finished difference Result 25020 states and 79293 transitions. [2021-08-06 15:41:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-08-06 15:41:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 [2021-08-06 15:41:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:20,461 INFO L225 Difference]: With dead ends: 25020 [2021-08-06 15:41:20,461 INFO L226 Difference]: Without dead ends: 25020 [2021-08-06 15:41:20,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5435 ImplicationChecksByTransitivity, 1131.6ms TimeCoverageRelationStatistics Valid=2370, Invalid=10740, Unknown=0, NotChecked=0, Total=13110 [2021-08-06 15:41:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25020 states. [2021-08-06 15:41:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25020 to 11511. [2021-08-06 15:41:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11511 states, 11510 states have (on average 3.42241529105126) internal successors, (39392), 11510 states have internal predecessors, (39392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11511 states to 11511 states and 39392 transitions. [2021-08-06 15:41:20,840 INFO L78 Accepts]: Start accepts. Automaton has 11511 states and 39392 transitions. Word has length 36 [2021-08-06 15:41:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:20,840 INFO L470 AbstractCegarLoop]: Abstraction has 11511 states and 39392 transitions. [2021-08-06 15:41:20,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-08-06 15:41:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 11511 states and 39392 transitions. [2021-08-06 15:41:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:20,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:20,857 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:20,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:21,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 15:41:21,058 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 183157773, now seen corresponding path program 107 times [2021-08-06 15:41:21,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:21,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676485853] [2021-08-06 15:41:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:21,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:21,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:21,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676485853] [2021-08-06 15:41:21,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676485853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:21,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478231] [2021-08-06 15:41:21,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:41:21,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:21,155 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:21,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 15:41:24,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:41:24,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:41:24,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:24,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:24,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:24,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-08-06 15:41:24,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534959880] [2021-08-06 15:41:24,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:41:24,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:41:24,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:41:24,800 INFO L87 Difference]: Start difference. First operand 11511 states and 39392 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:26,094 INFO L93 Difference]: Finished difference Result 22696 states and 73496 transitions. [2021-08-06 15:41:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 15:41:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:41:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:26,148 INFO L225 Difference]: With dead ends: 22696 [2021-08-06 15:41:26,148 INFO L226 Difference]: Without dead ends: 22616 [2021-08-06 15:41:26,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 15:41:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-08-06 15:41:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 11971. [2021-08-06 15:41:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11971 states, 11970 states have (on average 3.3981620718462824) internal successors, (40676), 11970 states have internal predecessors, (40676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11971 states to 11971 states and 40676 transitions. [2021-08-06 15:41:26,517 INFO L78 Accepts]: Start accepts. Automaton has 11971 states and 40676 transitions. Word has length 36 [2021-08-06 15:41:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:26,517 INFO L470 AbstractCegarLoop]: Abstraction has 11971 states and 40676 transitions. [2021-08-06 15:41:26,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 11971 states and 40676 transitions. [2021-08-06 15:41:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:26,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:26,535 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:26,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:26,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:26,736 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash -702585591, now seen corresponding path program 108 times [2021-08-06 15:41:26,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:26,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349641397] [2021-08-06 15:41:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:26,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:26,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:26,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349641397] [2021-08-06 15:41:26,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349641397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:26,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170569776] [2021-08-06 15:41:26,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:41:26,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:26,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:26,822 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:26,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 15:41:30,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:41:30,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:41:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:30,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-08-06 15:41:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-06 15:41:30,691 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-08-06 15:41:30,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-08-06 15:41:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-08-06 15:41:30,799 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-08-06 15:41:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 36 [2021-08-06 15:41:30,902 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-08-06 15:41:30,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 51 [2021-08-06 15:41:31,165 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-08-06 15:41:31,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 55 treesize of output 66 [2021-08-06 15:41:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:31,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170569776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:31,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:31,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:41:31,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707194945] [2021-08-06 15:41:31,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:41:31,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:31,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:41:31,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:41:31,615 INFO L87 Difference]: Start difference. First operand 11971 states and 40676 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:35,162 INFO L93 Difference]: Finished difference Result 23144 states and 74794 transitions. [2021-08-06 15:41:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-06 15:41:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:41:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:35,207 INFO L225 Difference]: With dead ends: 23144 [2021-08-06 15:41:35,207 INFO L226 Difference]: Without dead ends: 21898 [2021-08-06 15:41:35,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4063 ImplicationChecksByTransitivity, 2335.9ms TimeCoverageRelationStatistics Valid=1282, Invalid=10060, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 15:41:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21898 states. [2021-08-06 15:41:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21898 to 14725. [2021-08-06 15:41:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14725 states, 14724 states have (on average 3.3465091007878294) internal successors, (49274), 14724 states have internal predecessors, (49274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14725 states to 14725 states and 49274 transitions. [2021-08-06 15:41:35,593 INFO L78 Accepts]: Start accepts. Automaton has 14725 states and 49274 transitions. Word has length 36 [2021-08-06 15:41:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:35,593 INFO L470 AbstractCegarLoop]: Abstraction has 14725 states and 49274 transitions. [2021-08-06 15:41:35,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14725 states and 49274 transitions. [2021-08-06 15:41:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:35,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:35,618 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:35,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:35,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 15:41:35,818 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:35,819 INFO L82 PathProgramCache]: Analyzing trace with hash -24800395, now seen corresponding path program 109 times [2021-08-06 15:41:35,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:35,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115443936] [2021-08-06 15:41:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:35,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:35,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:35,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115443936] [2021-08-06 15:41:35,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115443936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:35,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389067884] [2021-08-06 15:41:35,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:41:35,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:35,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:35,919 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:35,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 15:41:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:39,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:41:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:39,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389067884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:39,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:39,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-06 15:41:39,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832728883] [2021-08-06 15:41:39,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:41:39,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:41:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:41:39,660 INFO L87 Difference]: Start difference. First operand 14725 states and 49274 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-08-06 15:41:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:40,793 INFO L93 Difference]: Finished difference Result 28014 states and 89837 transitions. [2021-08-06 15:41:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 15:41:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 [2021-08-06 15:41:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:40,854 INFO L225 Difference]: With dead ends: 28014 [2021-08-06 15:41:40,854 INFO L226 Difference]: Without dead ends: 28014 [2021-08-06 15:41:40,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=1260, Invalid=3996, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:41:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28014 states. [2021-08-06 15:41:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28014 to 15669. [2021-08-06 15:41:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15669 states, 15668 states have (on average 3.3602884860862905) internal successors, (52649), 15668 states have internal predecessors, (52649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15669 states to 15669 states and 52649 transitions. [2021-08-06 15:41:41,304 INFO L78 Accepts]: Start accepts. Automaton has 15669 states and 52649 transitions. Word has length 36 [2021-08-06 15:41:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:41,304 INFO L470 AbstractCegarLoop]: Abstraction has 15669 states and 52649 transitions. [2021-08-06 15:41:41,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-08-06 15:41:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 15669 states and 52649 transitions. [2021-08-06 15:41:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:41,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:41,328 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:41,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 15:41:41,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 15:41:41,530 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash 949817871, now seen corresponding path program 110 times [2021-08-06 15:41:41,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:41,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541492069] [2021-08-06 15:41:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:41,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:41,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:41,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541492069] [2021-08-06 15:41:41,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541492069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:41,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467937563] [2021-08-06 15:41:41,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:41:41,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:41,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:41,612 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:41,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 15:41:45,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:41:45,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:41:45,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:41:45,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467937563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:45,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:45,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:41:45,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885996769] [2021-08-06 15:41:45,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:41:45,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:41:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:41:45,403 INFO L87 Difference]: Start difference. First operand 15669 states and 52649 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:41:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:47,408 INFO L93 Difference]: Finished difference Result 28983 states and 92884 transitions. [2021-08-06 15:41:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-06 15:41:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 [2021-08-06 15:41:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:47,471 INFO L225 Difference]: With dead ends: 28983 [2021-08-06 15:41:47,471 INFO L226 Difference]: Without dead ends: 28983 [2021-08-06 15:41:47,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5478 ImplicationChecksByTransitivity, 1342.1ms TimeCoverageRelationStatistics Valid=2465, Invalid=11107, Unknown=0, NotChecked=0, Total=13572 [2021-08-06 15:41:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28983 states. [2021-08-06 15:41:47,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28983 to 15605. [2021-08-06 15:41:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15605 states, 15604 states have (on average 3.3609971802102026) internal successors, (52445), 15604 states have internal predecessors, (52445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15605 states to 15605 states and 52445 transitions. [2021-08-06 15:41:47,863 INFO L78 Accepts]: Start accepts. Automaton has 15605 states and 52445 transitions. Word has length 36 [2021-08-06 15:41:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:47,863 INFO L470 AbstractCegarLoop]: Abstraction has 15605 states and 52445 transitions. [2021-08-06 15:41:47,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:41:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 15605 states and 52445 transitions. [2021-08-06 15:41:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:47,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:47,888 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:47,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:48,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 15:41:48,097 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash 929703887, now seen corresponding path program 111 times [2021-08-06 15:41:48,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:48,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111724967] [2021-08-06 15:41:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:48,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:48,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:48,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111724967] [2021-08-06 15:41:48,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111724967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:48,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617672783] [2021-08-06 15:41:48,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:41:48,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:48,180 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:48,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 15:41:51,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:41:51,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:51,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:41:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:51,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617672783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:51,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:51,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:41:51,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231364227] [2021-08-06 15:41:51,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:41:51,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:41:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:41:51,949 INFO L87 Difference]: Start difference. First operand 15605 states and 52445 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 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) [2021-08-06 15:41:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:53,267 INFO L93 Difference]: Finished difference Result 27516 states and 89294 transitions. [2021-08-06 15:41:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-06 15:41:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 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 [2021-08-06 15:41:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:53,329 INFO L225 Difference]: With dead ends: 27516 [2021-08-06 15:41:53,329 INFO L226 Difference]: Without dead ends: 27496 [2021-08-06 15:41:53,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 825.2ms TimeCoverageRelationStatistics Valid=1255, Invalid=4907, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:41:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27496 states. [2021-08-06 15:41:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27496 to 15611. [2021-08-06 15:41:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15611 states, 15610 states have (on average 3.361050608584241) internal successors, (52466), 15610 states have internal predecessors, (52466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15611 states to 15611 states and 52466 transitions. [2021-08-06 15:41:53,720 INFO L78 Accepts]: Start accepts. Automaton has 15611 states and 52466 transitions. Word has length 36 [2021-08-06 15:41:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:53,721 INFO L470 AbstractCegarLoop]: Abstraction has 15611 states and 52466 transitions. [2021-08-06 15:41:53,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 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) [2021-08-06 15:41:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 15611 states and 52466 transitions. [2021-08-06 15:41:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:53,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:53,744 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:53,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:53,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:53,957 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash -483552741, now seen corresponding path program 112 times [2021-08-06 15:41:53,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:53,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551320125] [2021-08-06 15:41:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:53,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:41:54,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:54,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551320125] [2021-08-06 15:41:54,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551320125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:54,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114282765] [2021-08-06 15:41:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:41:54,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:54,049 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:54,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 15:41:57,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:41:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:57,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:41:57,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:41:57,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114282765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:57,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:57,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:41:57,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243412415] [2021-08-06 15:41:57,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:41:57,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:57,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:41:57,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:41:57,909 INFO L87 Difference]: Start difference. First operand 15611 states and 52466 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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) [2021-08-06 15:41:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:59,167 INFO L93 Difference]: Finished difference Result 28073 states and 90722 transitions. [2021-08-06 15:41:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 15:41:59,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 [2021-08-06 15:41:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:59,228 INFO L225 Difference]: With dead ends: 28073 [2021-08-06 15:41:59,228 INFO L226 Difference]: Without dead ends: 28049 [2021-08-06 15:41:59,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 775.0ms TimeCoverageRelationStatistics Valid=1304, Invalid=4858, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:41:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28049 states. [2021-08-06 15:41:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28049 to 15747. [2021-08-06 15:41:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15747 states, 15746 states have (on average 3.3578051568652354) internal successors, (52872), 15746 states have internal predecessors, (52872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15747 states to 15747 states and 52872 transitions. [2021-08-06 15:41:59,655 INFO L78 Accepts]: Start accepts. Automaton has 15747 states and 52872 transitions. Word has length 36 [2021-08-06 15:41:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:59,655 INFO L470 AbstractCegarLoop]: Abstraction has 15747 states and 52872 transitions. [2021-08-06 15:41:59,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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) [2021-08-06 15:41:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 15747 states and 52872 transitions. [2021-08-06 15:41:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:41:59,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:59,681 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:59,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:59,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:59,889 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1120019595, now seen corresponding path program 113 times [2021-08-06 15:41:59,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:59,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544355768] [2021-08-06 15:41:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:59,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:59,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:59,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544355768] [2021-08-06 15:41:59,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544355768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:59,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937733002] [2021-08-06 15:41:59,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:41:59,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:59,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:59,985 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:59,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 15:42:03,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:42:03,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:03,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:42:03,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937733002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:03,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:03,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-08-06 15:42:03,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675349105] [2021-08-06 15:42:03,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:42:03,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:03,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:42:03,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:42:03,901 INFO L87 Difference]: Start difference. First operand 15747 states and 52872 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-08-06 15:42:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:05,194 INFO L93 Difference]: Finished difference Result 27855 states and 90186 transitions. [2021-08-06 15:42:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 15:42:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 [2021-08-06 15:42:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:05,258 INFO L225 Difference]: With dead ends: 27855 [2021-08-06 15:42:05,258 INFO L226 Difference]: Without dead ends: 27807 [2021-08-06 15:42:05,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 815.2ms TimeCoverageRelationStatistics Valid=1421, Invalid=5221, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 15:42:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27807 states. [2021-08-06 15:42:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27807 to 15597. [2021-08-06 15:42:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15597 states, 15596 states have (on average 3.36246473454732) internal successors, (52441), 15596 states have internal predecessors, (52441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15597 states to 15597 states and 52441 transitions. [2021-08-06 15:42:05,652 INFO L78 Accepts]: Start accepts. Automaton has 15597 states and 52441 transitions. Word has length 36 [2021-08-06 15:42:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:05,652 INFO L470 AbstractCegarLoop]: Abstraction has 15597 states and 52441 transitions. [2021-08-06 15:42:05,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-08-06 15:42:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 15597 states and 52441 transitions. [2021-08-06 15:42:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:42:05,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:05,676 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:05,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:05,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 15:42:05,877 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash -918933511, now seen corresponding path program 114 times [2021-08-06 15:42:05,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:05,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233374080] [2021-08-06 15:42:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:05,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:05,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:05,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233374080] [2021-08-06 15:42:05,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233374080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:05,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397617023] [2021-08-06 15:42:05,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:42:05,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:05,965 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:05,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 15:42:09,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:42:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:42:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:09,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 15:42:09,924 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:42:09,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-08-06 15:42:10,145 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:42:10,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 48 [2021-08-06 15:42:10,459 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-08-06 15:42:10,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 62 [2021-08-06 15:42:10,662 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-08-06 15:42:10,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 75 [2021-08-06 15:42:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:11,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397617023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:11,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:11,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:42:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051420154] [2021-08-06 15:42:11,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:42:11,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:42:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:42:11,130 INFO L87 Difference]: Start difference. First operand 15597 states and 52441 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:14,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:14,830 INFO L93 Difference]: Finished difference Result 26855 states and 86106 transitions. [2021-08-06 15:42:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 15:42:14,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:42:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:14,891 INFO L225 Difference]: With dead ends: 26855 [2021-08-06 15:42:14,891 INFO L226 Difference]: Without dead ends: 26238 [2021-08-06 15:42:14,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1672.9ms TimeCoverageRelationStatistics Valid=651, Invalid=4461, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:42:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26238 states. [2021-08-06 15:42:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26238 to 17801. [2021-08-06 15:42:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17801 states, 17800 states have (on average 3.3901685393258427) internal successors, (60345), 17800 states have internal predecessors, (60345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17801 states to 17801 states and 60345 transitions. [2021-08-06 15:42:15,320 INFO L78 Accepts]: Start accepts. Automaton has 17801 states and 60345 transitions. Word has length 36 [2021-08-06 15:42:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:15,320 INFO L470 AbstractCegarLoop]: Abstraction has 17801 states and 60345 transitions. [2021-08-06 15:42:15,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 17801 states and 60345 transitions. [2021-08-06 15:42:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:42:15,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:15,350 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:15,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:15,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2021-08-06 15:42:15,551 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1204375607, now seen corresponding path program 115 times [2021-08-06 15:42:15,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:15,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523369172] [2021-08-06 15:42:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:15,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:15,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:15,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523369172] [2021-08-06 15:42:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523369172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:15,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249559222] [2021-08-06 15:42:15,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:42:15,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:15,641 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:15,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 15:42:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:19,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:42:19,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:19,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249559222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:19,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:19,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-06 15:42:19,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193105222] [2021-08-06 15:42:19,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:42:19,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:42:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:42:19,665 INFO L87 Difference]: Start difference. First operand 17801 states and 60345 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-08-06 15:42:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:20,612 INFO L93 Difference]: Finished difference Result 38958 states and 127046 transitions. [2021-08-06 15:42:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:42:20,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 [2021-08-06 15:42:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:20,716 INFO L225 Difference]: With dead ends: 38958 [2021-08-06 15:42:20,717 INFO L226 Difference]: Without dead ends: 38958 [2021-08-06 15:42:20,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=627, Invalid=2129, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:42:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38958 states. [2021-08-06 15:42:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38958 to 18277. [2021-08-06 15:42:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18277 states, 18276 states have (on average 3.4033705405996937) internal successors, (62200), 18276 states have internal predecessors, (62200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18277 states to 18277 states and 62200 transitions. [2021-08-06 15:42:21,394 INFO L78 Accepts]: Start accepts. Automaton has 18277 states and 62200 transitions. Word has length 36 [2021-08-06 15:42:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:21,394 INFO L470 AbstractCegarLoop]: Abstraction has 18277 states and 62200 transitions. [2021-08-06 15:42:21,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-08-06 15:42:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 18277 states and 62200 transitions. [2021-08-06 15:42:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:42:21,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:21,422 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:21,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:21,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:21,622 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:21,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1111062149, now seen corresponding path program 116 times [2021-08-06 15:42:21,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:21,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931314442] [2021-08-06 15:42:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:21,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:21,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:21,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931314442] [2021-08-06 15:42:21,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931314442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:21,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828870214] [2021-08-06 15:42:21,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:42:21,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:21,717 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:21,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 15:42:25,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:42:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:42:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:25,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828870214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:25,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:25,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 15:42:25,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409716225] [2021-08-06 15:42:25,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:42:25,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:42:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:42:25,641 INFO L87 Difference]: Start difference. First operand 18277 states and 62200 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:27,990 INFO L93 Difference]: Finished difference Result 40313 states and 129784 transitions. [2021-08-06 15:42:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-08-06 15:42:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:42:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:28,085 INFO L225 Difference]: With dead ends: 40313 [2021-08-06 15:42:28,085 INFO L226 Difference]: Without dead ends: 40295 [2021-08-06 15:42:28,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5735 ImplicationChecksByTransitivity, 1453.6ms TimeCoverageRelationStatistics Valid=2935, Invalid=11827, Unknown=0, NotChecked=0, Total=14762 [2021-08-06 15:42:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40295 states. [2021-08-06 15:42:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40295 to 19087. [2021-08-06 15:42:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19087 states, 19086 states have (on average 3.411191449229802) internal successors, (65106), 19086 states have internal predecessors, (65106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19087 states to 19087 states and 65106 transitions. [2021-08-06 15:42:28,747 INFO L78 Accepts]: Start accepts. Automaton has 19087 states and 65106 transitions. Word has length 36 [2021-08-06 15:42:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:28,747 INFO L470 AbstractCegarLoop]: Abstraction has 19087 states and 65106 transitions. [2021-08-06 15:42:28,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 19087 states and 65106 transitions. [2021-08-06 15:42:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:42:28,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:28,775 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:28,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:28,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:28,976 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2036734385, now seen corresponding path program 117 times [2021-08-06 15:42:28,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:28,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951282175] [2021-08-06 15:42:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:28,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:29,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:29,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951282175] [2021-08-06 15:42:29,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951282175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:29,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311107326] [2021-08-06 15:42:29,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:42:29,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:29,064 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:29,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 15:42:32,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:42:32,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:42:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:33,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-06 15:42:33,218 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-06 15:42:33,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-06 15:42:33,420 INFO L354 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2021-08-06 15:42:33,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 48 [2021-08-06 15:42:33,732 INFO L354 Elim1Store]: treesize reduction 82, result has 18.0 percent of original size [2021-08-06 15:42:33,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 66 [2021-08-06 15:42:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 15:42:34,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311107326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:34,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:34,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 15:42:34,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009830365] [2021-08-06 15:42:34,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:42:34,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:42:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:42:34,106 INFO L87 Difference]: Start difference. First operand 19087 states and 65106 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:39,051 INFO L93 Difference]: Finished difference Result 32682 states and 106839 transitions. [2021-08-06 15:42:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-06 15:42:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:42:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:39,125 INFO L225 Difference]: With dead ends: 32682 [2021-08-06 15:42:39,125 INFO L226 Difference]: Without dead ends: 32682 [2021-08-06 15:42:39,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 3402.6ms TimeCoverageRelationStatistics Valid=2380, Invalid=11426, Unknown=0, NotChecked=0, Total=13806 [2021-08-06 15:42:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-08-06 15:42:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 19560. [2021-08-06 15:42:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19560 states, 19559 states have (on average 3.4361163658673757) internal successors, (67207), 19559 states have internal predecessors, (67207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 67207 transitions. [2021-08-06 15:42:39,707 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 67207 transitions. Word has length 36 [2021-08-06 15:42:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:39,707 INFO L470 AbstractCegarLoop]: Abstraction has 19560 states and 67207 transitions. [2021-08-06 15:42:39,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 67207 transitions. [2021-08-06 15:42:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:42:39,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:39,736 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:39,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:39,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 15:42:39,937 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:39,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1705647111, now seen corresponding path program 118 times [2021-08-06 15:42:39,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:39,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30688996] [2021-08-06 15:42:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:39,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:40,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:40,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30688996] [2021-08-06 15:42:40,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30688996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:40,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104074383] [2021-08-06 15:42:40,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:42:40,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:40,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:40,027 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:40,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 15:42:43,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:42:43,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:43,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:42:43,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:44,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104074383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:44,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:44,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-06 15:42:44,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738629300] [2021-08-06 15:42:44,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:42:44,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:42:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:42:44,120 INFO L87 Difference]: Start difference. First operand 19560 states and 67207 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:42:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:45,757 INFO L93 Difference]: Finished difference Result 47080 states and 154781 transitions. [2021-08-06 15:42:45,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 15:42:45,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 [2021-08-06 15:42:45,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:45,874 INFO L225 Difference]: With dead ends: 47080 [2021-08-06 15:42:45,874 INFO L226 Difference]: Without dead ends: 47062 [2021-08-06 15:42:45,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 896.4ms TimeCoverageRelationStatistics Valid=1339, Invalid=4513, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 15:42:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47062 states. [2021-08-06 15:42:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47062 to 19629. [2021-08-06 15:42:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19629 states, 19628 states have (on average 3.43748726309354) internal successors, (67471), 19628 states have internal predecessors, (67471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19629 states to 19629 states and 67471 transitions. [2021-08-06 15:42:46,586 INFO L78 Accepts]: Start accepts. Automaton has 19629 states and 67471 transitions. Word has length 36 [2021-08-06 15:42:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:46,586 INFO L470 AbstractCegarLoop]: Abstraction has 19629 states and 67471 transitions. [2021-08-06 15:42:46,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:42:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 19629 states and 67471 transitions. [2021-08-06 15:42:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:42:46,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:46,616 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:46,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:46,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 15:42:46,817 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1690186315, now seen corresponding path program 119 times [2021-08-06 15:42:46,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:46,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023730908] [2021-08-06 15:42:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:46,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:46,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:46,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023730908] [2021-08-06 15:42:46,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023730908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:46,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602865197] [2021-08-06 15:42:46,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:42:46,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:46,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:46,905 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:46,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 15:42:50,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:42:50,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:42:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:51,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602865197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:51,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:51,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-06 15:42:51,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782113345] [2021-08-06 15:42:51,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:42:51,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:42:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:42:51,073 INFO L87 Difference]: Start difference. First operand 19629 states and 67471 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:42:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:52,853 INFO L93 Difference]: Finished difference Result 47598 states and 155877 transitions. [2021-08-06 15:42:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-06 15:42:52,853 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 [2021-08-06 15:42:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:52,972 INFO L225 Difference]: With dead ends: 47598 [2021-08-06 15:42:52,972 INFO L226 Difference]: Without dead ends: 47598 [2021-08-06 15:42:52,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 980.9ms TimeCoverageRelationStatistics Valid=1790, Invalid=5520, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 15:42:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47598 states. [2021-08-06 15:42:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47598 to 19553. [2021-08-06 15:42:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19553 states, 19552 states have (on average 3.433612929623568) internal successors, (67134), 19552 states have internal predecessors, (67134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19553 states to 19553 states and 67134 transitions. [2021-08-06 15:42:53,663 INFO L78 Accepts]: Start accepts. Automaton has 19553 states and 67134 transitions. Word has length 36 [2021-08-06 15:42:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 19553 states and 67134 transitions. [2021-08-06 15:42:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:42:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19553 states and 67134 transitions. [2021-08-06 15:42:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:42:53,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:53,693 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:53,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 15:42:53,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 15:42:53,894 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash -542052815, now seen corresponding path program 120 times [2021-08-06 15:42:53,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:53,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32515731] [2021-08-06 15:42:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:53,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:42:53,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:53,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32515731] [2021-08-06 15:42:53,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32515731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:53,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350124035] [2021-08-06 15:42:53,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:42:53,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:53,996 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:53,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 15:42:57,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:42:57,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:57,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:42:57,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:42:58,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350124035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:58,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:58,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 15:42:58,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014626487] [2021-08-06 15:42:58,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:42:58,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:42:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:42:58,181 INFO L87 Difference]: Start difference. First operand 19553 states and 67134 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:01,017 INFO L93 Difference]: Finished difference Result 44292 states and 143871 transitions. [2021-08-06 15:43:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-06 15:43:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:43:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:01,121 INFO L225 Difference]: With dead ends: 44292 [2021-08-06 15:43:01,121 INFO L226 Difference]: Without dead ends: 44256 [2021-08-06 15:43:01,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6322 ImplicationChecksByTransitivity, 1643.8ms TimeCoverageRelationStatistics Valid=3226, Invalid=13030, Unknown=0, NotChecked=0, Total=16256 [2021-08-06 15:43:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44256 states. [2021-08-06 15:43:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44256 to 19642. [2021-08-06 15:43:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19642 states, 19641 states have (on average 3.449264294078713) internal successors, (67747), 19641 states have internal predecessors, (67747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19642 states to 19642 states and 67747 transitions. [2021-08-06 15:43:01,732 INFO L78 Accepts]: Start accepts. Automaton has 19642 states and 67747 transitions. Word has length 36 [2021-08-06 15:43:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:01,732 INFO L470 AbstractCegarLoop]: Abstraction has 19642 states and 67747 transitions. [2021-08-06 15:43:01,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 19642 states and 67747 transitions. [2021-08-06 15:43:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:01,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:01,763 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:01,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:01,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 15:43:01,963 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:01,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1921982083, now seen corresponding path program 121 times [2021-08-06 15:43:01,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:01,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708545944] [2021-08-06 15:43:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:01,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:43:02,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:02,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708545944] [2021-08-06 15:43:02,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708545944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:02,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318275627] [2021-08-06 15:43:02,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:43:02,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:02,046 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:02,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 15:43:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:43:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:43:06,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318275627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:06,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:06,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:43:06,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664535970] [2021-08-06 15:43:06,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:43:06,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:43:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:43:06,221 INFO L87 Difference]: Start difference. First operand 19642 states and 67747 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:43:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:09,240 INFO L93 Difference]: Finished difference Result 41473 states and 134018 transitions. [2021-08-06 15:43:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-08-06 15:43:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 [2021-08-06 15:43:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:09,339 INFO L225 Difference]: With dead ends: 41473 [2021-08-06 15:43:09,339 INFO L226 Difference]: Without dead ends: 41469 [2021-08-06 15:43:09,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8393 ImplicationChecksByTransitivity, 1929.0ms TimeCoverageRelationStatistics Valid=3965, Invalid=16341, Unknown=0, NotChecked=0, Total=20306 [2021-08-06 15:43:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41469 states. [2021-08-06 15:43:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41469 to 19487. [2021-08-06 15:43:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19487 states, 19486 states have (on average 3.4444729549420097) internal successors, (67119), 19486 states have internal predecessors, (67119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19487 states to 19487 states and 67119 transitions. [2021-08-06 15:43:09,943 INFO L78 Accepts]: Start accepts. Automaton has 19487 states and 67119 transitions. Word has length 36 [2021-08-06 15:43:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:09,943 INFO L470 AbstractCegarLoop]: Abstraction has 19487 states and 67119 transitions. [2021-08-06 15:43:09,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2021-08-06 15:43:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 19487 states and 67119 transitions. [2021-08-06 15:43:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:09,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:09,972 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:10,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:10,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:10,173 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1476048847, now seen corresponding path program 122 times [2021-08-06 15:43:10,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:10,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150196301] [2021-08-06 15:43:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:10,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:10,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:10,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150196301] [2021-08-06 15:43:10,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150196301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:10,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937137931] [2021-08-06 15:43:10,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:43:10,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:10,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:10,261 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:10,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 15:43:14,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:43:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:43:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:43:14,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937137931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:14,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:14,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-06 15:43:14,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730903698] [2021-08-06 15:43:14,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:43:14,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:43:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:43:14,463 INFO L87 Difference]: Start difference. First operand 19487 states and 67119 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:43:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:16,405 INFO L93 Difference]: Finished difference Result 39127 states and 127710 transitions. [2021-08-06 15:43:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-06 15:43:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 [2021-08-06 15:43:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:16,497 INFO L225 Difference]: With dead ends: 39127 [2021-08-06 15:43:16,498 INFO L226 Difference]: Without dead ends: 39047 [2021-08-06 15:43:16,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 1256.2ms TimeCoverageRelationStatistics Valid=2404, Invalid=8938, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 15:43:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39047 states. [2021-08-06 15:43:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39047 to 19564. [2021-08-06 15:43:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19564 states, 19563 states have (on average 3.434647037775392) internal successors, (67192), 19563 states have internal predecessors, (67192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19564 states to 19564 states and 67192 transitions. [2021-08-06 15:43:17,167 INFO L78 Accepts]: Start accepts. Automaton has 19564 states and 67192 transitions. Word has length 36 [2021-08-06 15:43:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:17,167 INFO L470 AbstractCegarLoop]: Abstraction has 19564 states and 67192 transitions. [2021-08-06 15:43:17,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2021-08-06 15:43:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 19564 states and 67192 transitions. [2021-08-06 15:43:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:17,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:17,200 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:17,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 15:43:17,401 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash 302089137, now seen corresponding path program 123 times [2021-08-06 15:43:17,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:17,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951060340] [2021-08-06 15:43:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:17,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:17,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:17,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951060340] [2021-08-06 15:43:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951060340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:17,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845721893] [2021-08-06 15:43:17,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:43:17,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:17,491 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:17,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 15:43:21,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:43:21,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:21,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:43:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:21,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 15:43:21,668 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-06 15:43:21,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-08-06 15:43:21,751 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-08-06 15:43:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 41 [2021-08-06 15:43:21,890 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-08-06 15:43:21,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2021-08-06 15:43:22,162 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-08-06 15:43:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 71 [2021-08-06 15:43:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:43:22,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845721893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:22,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:22,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:43:22,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782623110] [2021-08-06 15:43:22,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:43:22,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:43:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:43:22,756 INFO L87 Difference]: Start difference. First operand 19564 states and 67192 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:26,728 INFO L93 Difference]: Finished difference Result 33930 states and 111776 transitions. [2021-08-06 15:43:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-06 15:43:26,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 15:43:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:26,798 INFO L225 Difference]: With dead ends: 33930 [2021-08-06 15:43:26,799 INFO L226 Difference]: Without dead ends: 31761 [2021-08-06 15:43:26,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 2729.9ms TimeCoverageRelationStatistics Valid=1410, Invalid=8690, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 15:43:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31761 states. [2021-08-06 15:43:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31761 to 19478. [2021-08-06 15:43:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19478 states, 19477 states have (on average 3.344919648816553) internal successors, (65149), 19477 states have internal predecessors, (65149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19478 states to 19478 states and 65149 transitions. [2021-08-06 15:43:27,253 INFO L78 Accepts]: Start accepts. Automaton has 19478 states and 65149 transitions. Word has length 36 [2021-08-06 15:43:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:27,254 INFO L470 AbstractCegarLoop]: Abstraction has 19478 states and 65149 transitions. [2021-08-06 15:43:27,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 19478 states and 65149 transitions. [2021-08-06 15:43:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:27,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:27,282 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:27,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:27,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 15:43:27,482 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:27,482 INFO L82 PathProgramCache]: Analyzing trace with hash -151790323, now seen corresponding path program 124 times [2021-08-06 15:43:27,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:27,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052970237] [2021-08-06 15:43:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:27,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:27,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:27,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052970237] [2021-08-06 15:43:27,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052970237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:27,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660681832] [2021-08-06 15:43:27,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:43:27,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:27,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:27,574 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:27,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 15:43:31,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:43:31,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:43:31,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:43:31,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660681832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:31,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:31,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 15:43:31,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793004649] [2021-08-06 15:43:31,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:43:31,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:31,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:43:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:43:31,947 INFO L87 Difference]: Start difference. First operand 19478 states and 65149 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:43:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:33,141 INFO L93 Difference]: Finished difference Result 44323 states and 143701 transitions. [2021-08-06 15:43:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:43:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 [2021-08-06 15:43:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:33,245 INFO L225 Difference]: With dead ends: 44323 [2021-08-06 15:43:33,245 INFO L226 Difference]: Without dead ends: 44323 [2021-08-06 15:43:33,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:43:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2021-08-06 15:43:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 20081. [2021-08-06 15:43:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20081 states, 20080 states have (on average 3.3695219123505975) internal successors, (67660), 20080 states have internal predecessors, (67660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20081 states to 20081 states and 67660 transitions. [2021-08-06 15:43:34,054 INFO L78 Accepts]: Start accepts. Automaton has 20081 states and 67660 transitions. Word has length 36 [2021-08-06 15:43:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:34,054 INFO L470 AbstractCegarLoop]: Abstraction has 20081 states and 67660 transitions. [2021-08-06 15:43:34,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:43:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 20081 states and 67660 transitions. [2021-08-06 15:43:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:34,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:34,082 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:34,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:34,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:34,282 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash -136329527, now seen corresponding path program 125 times [2021-08-06 15:43:34,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:34,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227824894] [2021-08-06 15:43:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:34,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:34,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:34,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227824894] [2021-08-06 15:43:34,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227824894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:34,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793500070] [2021-08-06 15:43:34,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:43:34,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:34,375 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:34,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 15:43:38,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:43:38,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:38,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:43:38,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:43:38,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793500070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:38,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:38,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 15:43:38,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946681857] [2021-08-06 15:43:38,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:43:38,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:38,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:43:38,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:43:38,608 INFO L87 Difference]: Start difference. First operand 20081 states and 67660 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:43:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:39,923 INFO L93 Difference]: Finished difference Result 45173 states and 145570 transitions. [2021-08-06 15:43:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 15:43:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 [2021-08-06 15:43:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:40,037 INFO L225 Difference]: With dead ends: 45173 [2021-08-06 15:43:40,037 INFO L226 Difference]: Without dead ends: 45173 [2021-08-06 15:43:40,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 681.3ms TimeCoverageRelationStatistics Valid=1170, Invalid=3660, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 15:43:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45173 states. [2021-08-06 15:43:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45173 to 19539. [2021-08-06 15:43:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19539 states, 19538 states have (on average 3.349421639881257) internal successors, (65441), 19538 states have internal predecessors, (65441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19539 states to 19539 states and 65441 transitions. [2021-08-06 15:43:40,646 INFO L78 Accepts]: Start accepts. Automaton has 19539 states and 65441 transitions. Word has length 36 [2021-08-06 15:43:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 19539 states and 65441 transitions. [2021-08-06 15:43:40,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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) [2021-08-06 15:43:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 19539 states and 65441 transitions. [2021-08-06 15:43:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:40,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:40,675 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:40,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:40,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:40,875 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash -886686839, now seen corresponding path program 126 times [2021-08-06 15:43:40,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:40,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838087625] [2021-08-06 15:43:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:40,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:40,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:40,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838087625] [2021-08-06 15:43:40,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838087625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:40,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517974201] [2021-08-06 15:43:40,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:43:40,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:40,967 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:40,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 15:43:45,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:43:45,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:45,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:43:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:43:45,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517974201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:45,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:45,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-06 15:43:45,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368622645] [2021-08-06 15:43:45,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:43:45,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:43:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:43:45,353 INFO L87 Difference]: Start difference. First operand 19539 states and 65441 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:47,387 INFO L93 Difference]: Finished difference Result 43143 states and 138108 transitions. [2021-08-06 15:43:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-06 15:43:47,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:43:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:47,484 INFO L225 Difference]: With dead ends: 43143 [2021-08-06 15:43:47,484 INFO L226 Difference]: Without dead ends: 43143 [2021-08-06 15:43:47,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 1191.3ms TimeCoverageRelationStatistics Valid=2162, Invalid=8758, Unknown=0, NotChecked=0, Total=10920 [2021-08-06 15:43:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43143 states. [2021-08-06 15:43:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43143 to 19758. [2021-08-06 15:43:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19758 states, 19757 states have (on average 3.347016247405983) internal successors, (66127), 19757 states have internal predecessors, (66127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19758 states to 19758 states and 66127 transitions. [2021-08-06 15:43:48,104 INFO L78 Accepts]: Start accepts. Automaton has 19758 states and 66127 transitions. Word has length 36 [2021-08-06 15:43:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:48,104 INFO L470 AbstractCegarLoop]: Abstraction has 19758 states and 66127 transitions. [2021-08-06 15:43:48,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 19758 states and 66127 transitions. [2021-08-06 15:43:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:48,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:48,134 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:48,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:48,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:48,335 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1933923443, now seen corresponding path program 127 times [2021-08-06 15:43:48,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:48,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707682577] [2021-08-06 15:43:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:48,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:48,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:48,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707682577] [2021-08-06 15:43:48,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707682577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:48,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876275480] [2021-08-06 15:43:48,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:43:48,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:48,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:48,418 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:48,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 15:43:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:43:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:43:52,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876275480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:52,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:52,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-06 15:43:52,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669533095] [2021-08-06 15:43:52,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:43:52,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:43:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:43:52,752 INFO L87 Difference]: Start difference. First operand 19758 states and 66127 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2021-08-06 15:43:53,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:53,648 INFO L93 Difference]: Finished difference Result 45595 states and 148663 transitions. [2021-08-06 15:43:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:43:53,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 [2021-08-06 15:43:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:53,762 INFO L225 Difference]: With dead ends: 45595 [2021-08-06 15:43:53,762 INFO L226 Difference]: Without dead ends: 45595 [2021-08-06 15:43:53,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:43:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45595 states. [2021-08-06 15:43:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45595 to 20566. [2021-08-06 15:43:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20566 states, 20565 states have (on average 3.375054704595186) internal successors, (69408), 20565 states have internal predecessors, (69408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20566 states to 20566 states and 69408 transitions. [2021-08-06 15:43:54,633 INFO L78 Accepts]: Start accepts. Automaton has 20566 states and 69408 transitions. Word has length 36 [2021-08-06 15:43:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:54,633 INFO L470 AbstractCegarLoop]: Abstraction has 20566 states and 69408 transitions. [2021-08-06 15:43:54,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2021-08-06 15:43:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 20566 states and 69408 transitions. [2021-08-06 15:43:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:43:54,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:54,664 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:54,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:54,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-08-06 15:43:54,864 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1918462647, now seen corresponding path program 128 times [2021-08-06 15:43:54,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:54,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124369392] [2021-08-06 15:43:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:54,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:54,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:54,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124369392] [2021-08-06 15:43:54,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124369392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:54,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128610230] [2021-08-06 15:43:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:43:54,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:54,954 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:54,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 15:43:58,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:43:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:43:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:43:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128610230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:59,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:59,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-06 15:43:59,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773596176] [2021-08-06 15:43:59,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:43:59,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:43:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:43:59,243 INFO L87 Difference]: Start difference. First operand 20566 states and 69408 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2021-08-06 15:44:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:00,302 INFO L93 Difference]: Finished difference Result 45713 states and 148230 transitions. [2021-08-06 15:44:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:44:00,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 [2021-08-06 15:44:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:00,423 INFO L225 Difference]: With dead ends: 45713 [2021-08-06 15:44:00,423 INFO L226 Difference]: Without dead ends: 45713 [2021-08-06 15:44:00,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:44:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45713 states. [2021-08-06 15:44:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45713 to 20463. [2021-08-06 15:44:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20463 states, 20462 states have (on average 3.3709314827485093) internal successors, (68976), 20462 states have internal predecessors, (68976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20463 states to 20463 states and 68976 transitions. [2021-08-06 15:44:01,108 INFO L78 Accepts]: Start accepts. Automaton has 20463 states and 68976 transitions. Word has length 36 [2021-08-06 15:44:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:01,108 INFO L470 AbstractCegarLoop]: Abstraction has 20463 states and 68976 transitions. [2021-08-06 15:44:01,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) [2021-08-06 15:44:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 20463 states and 68976 transitions. [2021-08-06 15:44:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:44:01,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:01,139 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:01,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:01,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 15:44:01,340 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:01,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1225188411, now seen corresponding path program 129 times [2021-08-06 15:44:01,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:01,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802511896] [2021-08-06 15:44:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:01,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:01,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:01,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802511896] [2021-08-06 15:44:01,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802511896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:01,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958042709] [2021-08-06 15:44:01,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:44:01,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:01,422 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:01,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 15:44:05,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:44:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:44:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:44:05,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958042709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:05,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:05,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:44:05,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127602987] [2021-08-06 15:44:05,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:44:05,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:44:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:44:05,807 INFO L87 Difference]: Start difference. First operand 20463 states and 68976 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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) [2021-08-06 15:44:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:06,447 INFO L93 Difference]: Finished difference Result 43076 states and 139757 transitions. [2021-08-06 15:44:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:44:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 [2021-08-06 15:44:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:06,548 INFO L225 Difference]: With dead ends: 43076 [2021-08-06 15:44:06,548 INFO L226 Difference]: Without dead ends: 43076 [2021-08-06 15:44:06,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:44:06,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43076 states. [2021-08-06 15:44:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43076 to 20477. [2021-08-06 15:44:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20477 states, 20476 states have (on average 3.371312756397734) internal successors, (69031), 20476 states have internal predecessors, (69031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20477 states to 20477 states and 69031 transitions. [2021-08-06 15:44:07,177 INFO L78 Accepts]: Start accepts. Automaton has 20477 states and 69031 transitions. Word has length 36 [2021-08-06 15:44:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:07,177 INFO L470 AbstractCegarLoop]: Abstraction has 20477 states and 69031 transitions. [2021-08-06 15:44:07,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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) [2021-08-06 15:44:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20477 states and 69031 transitions. [2021-08-06 15:44:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:44:07,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:07,207 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:07,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:07,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 15:44:07,407 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:07,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2014401491, now seen corresponding path program 130 times [2021-08-06 15:44:07,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:07,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211659409] [2021-08-06 15:44:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:07,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:07,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:07,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211659409] [2021-08-06 15:44:07,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211659409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:07,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090498005] [2021-08-06 15:44:07,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:44:07,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:07,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:07,486 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:07,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 15:44:11,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:44:11,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:44:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:44:11,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090498005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:11,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:11,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:44:11,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657408569] [2021-08-06 15:44:11,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:44:11,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:11,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:44:11,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:44:11,888 INFO L87 Difference]: Start difference. First operand 20477 states and 69031 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:44:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:13,647 INFO L93 Difference]: Finished difference Result 44069 states and 142158 transitions. [2021-08-06 15:44:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 15:44:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 [2021-08-06 15:44:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:13,750 INFO L225 Difference]: With dead ends: 44069 [2021-08-06 15:44:13,750 INFO L226 Difference]: Without dead ends: 44045 [2021-08-06 15:44:13,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3758 ImplicationChecksByTransitivity, 1029.2ms TimeCoverageRelationStatistics Valid=1867, Invalid=8233, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 15:44:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44045 states. [2021-08-06 15:44:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44045 to 20758. [2021-08-06 15:44:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20758 states, 20757 states have (on average 3.3765958471840825) internal successors, (70088), 20757 states have internal predecessors, (70088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20758 states to 20758 states and 70088 transitions. [2021-08-06 15:44:14,374 INFO L78 Accepts]: Start accepts. Automaton has 20758 states and 70088 transitions. Word has length 36 [2021-08-06 15:44:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:14,374 INFO L470 AbstractCegarLoop]: Abstraction has 20758 states and 70088 transitions. [2021-08-06 15:44:14,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-08-06 15:44:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 20758 states and 70088 transitions. [2021-08-06 15:44:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:44:14,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:14,404 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:14,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:14,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:14,605 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash 738074519, now seen corresponding path program 131 times [2021-08-06 15:44:14,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:14,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013412232] [2021-08-06 15:44:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:14,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:14,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:14,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013412232] [2021-08-06 15:44:14,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013412232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:14,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381823196] [2021-08-06 15:44:14,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:44:14,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:14,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:14,689 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:14,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 15:44:18,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:44:18,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:18,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:44:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:44:19,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381823196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:19,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:19,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:44:19,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130899150] [2021-08-06 15:44:19,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:44:19,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:44:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:44:19,166 INFO L87 Difference]: Start difference. First operand 20758 states and 70088 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-08-06 15:44:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:19,796 INFO L93 Difference]: Finished difference Result 42623 states and 138415 transitions. [2021-08-06 15:44:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:44:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 [2021-08-06 15:44:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:19,895 INFO L225 Difference]: With dead ends: 42623 [2021-08-06 15:44:19,895 INFO L226 Difference]: Without dead ends: 42575 [2021-08-06 15:44:19,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:44:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42575 states. [2021-08-06 15:44:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42575 to 20772. [2021-08-06 15:44:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20772 states, 20771 states have (on average 3.3764864474507728) internal successors, (70133), 20771 states have internal predecessors, (70133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20772 states to 20772 states and 70133 transitions. [2021-08-06 15:44:20,606 INFO L78 Accepts]: Start accepts. Automaton has 20772 states and 70133 transitions. Word has length 36 [2021-08-06 15:44:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:20,606 INFO L470 AbstractCegarLoop]: Abstraction has 20772 states and 70133 transitions. [2021-08-06 15:44:20,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-08-06 15:44:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 20772 states and 70133 transitions. [2021-08-06 15:44:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:44:20,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:20,636 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:20,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:20,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 15:44:20,836 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1008584211, now seen corresponding path program 132 times [2021-08-06 15:44:20,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:20,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978754252] [2021-08-06 15:44:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:20,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:20,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:20,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978754252] [2021-08-06 15:44:20,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978754252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:20,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172571830] [2021-08-06 15:44:20,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:44:20,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:20,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:20,914 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:20,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 15:44:24,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:44:24,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:24,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:44:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:44:25,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172571830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:25,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:25,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:44:25,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577099020] [2021-08-06 15:44:25,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:44:25,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:44:25,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:44:25,270 INFO L87 Difference]: Start difference. First operand 20772 states and 70133 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-08-06 15:44:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:26,019 INFO L93 Difference]: Finished difference Result 43697 states and 141286 transitions. [2021-08-06 15:44:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:44:26,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 [2021-08-06 15:44:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:26,126 INFO L225 Difference]: With dead ends: 43697 [2021-08-06 15:44:26,126 INFO L226 Difference]: Without dead ends: 43697 [2021-08-06 15:44:26,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1252, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:44:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43697 states. [2021-08-06 15:44:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43697 to 20651. [2021-08-06 15:44:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20651 states, 20650 states have (on average 3.372639225181598) internal successors, (69645), 20650 states have internal predecessors, (69645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20651 states to 20651 states and 69645 transitions. [2021-08-06 15:44:26,773 INFO L78 Accepts]: Start accepts. Automaton has 20651 states and 69645 transitions. Word has length 36 [2021-08-06 15:44:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:26,773 INFO L470 AbstractCegarLoop]: Abstraction has 20651 states and 69645 transitions. [2021-08-06 15:44:26,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-08-06 15:44:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20651 states and 69645 transitions. [2021-08-06 15:44:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:44:26,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:26,804 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:26,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-06 15:44:27,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-06 15:44:27,004 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1295012657, now seen corresponding path program 133 times [2021-08-06 15:44:27,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:27,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224602266] [2021-08-06 15:44:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:27,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:27,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:27,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224602266] [2021-08-06 15:44:27,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224602266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:27,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530314761] [2021-08-06 15:44:27,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:44:27,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:27,088 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:27,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 15:44:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:44:31,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:44:31,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530314761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:31,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:31,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:44:31,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902473915] [2021-08-06 15:44:31,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:44:31,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:44:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:44:31,609 INFO L87 Difference]: Start difference. First operand 20651 states and 69645 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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) [2021-08-06 15:44:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:33,624 INFO L93 Difference]: Finished difference Result 42662 states and 137913 transitions. [2021-08-06 15:44:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-08-06 15:44:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 [2021-08-06 15:44:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:33,723 INFO L225 Difference]: With dead ends: 42662 [2021-08-06 15:44:33,723 INFO L226 Difference]: Without dead ends: 42582 [2021-08-06 15:44:33,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5228 ImplicationChecksByTransitivity, 1308.0ms TimeCoverageRelationStatistics Valid=2237, Invalid=11103, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 15:44:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42582 states. [2021-08-06 15:44:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42582 to 20823. [2021-08-06 15:44:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20823 states, 20822 states have (on average 3.378349822303333) internal successors, (70344), 20822 states have internal predecessors, (70344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20823 states to 20823 states and 70344 transitions. [2021-08-06 15:44:34,341 INFO L78 Accepts]: Start accepts. Automaton has 20823 states and 70344 transitions. Word has length 36 [2021-08-06 15:44:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:34,341 INFO L470 AbstractCegarLoop]: Abstraction has 20823 states and 70344 transitions. [2021-08-06 15:44:34,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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) [2021-08-06 15:44:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20823 states and 70344 transitions. [2021-08-06 15:44:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 15:44:34,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:34,371 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:34,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:34,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:34,572 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash -592043067, now seen corresponding path program 134 times [2021-08-06 15:44:34,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:34,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655270205] [2021-08-06 15:44:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:34,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:34,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:34,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655270205] [2021-08-06 15:44:34,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655270205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:34,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942335674] [2021-08-06 15:44:34,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:44:34,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:34,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:34,652 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 15:44:38,398 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:44:38,398 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:44:38,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:44:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:38,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:44:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:38,861 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-06 15:44:38,863 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:44:38,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:39,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-08-06 15:44:39,063 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. [2021-08-06 15:44:39,065 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:44:39,065 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:44:39,065 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:44:39,068 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:44:39,068 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:44:39,069 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:44:39 BasicIcfg [2021-08-06 15:44:39,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:44:39,069 INFO L168 Benchmark]: Toolchain (without parser) took 745442.60 ms. Allocated memory was 175.1 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 155.8 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-06 15:44:39,070 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 175.1 MB. Free memory is still 156.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:44:39,070 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.19 ms. Allocated memory is still 175.1 MB. Free memory was 155.8 MB in the beginning and 154.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:44:39,070 INFO L168 Benchmark]: Boogie Preprocessor took 16.77 ms. Allocated memory is still 175.1 MB. Free memory was 154.3 MB in the beginning and 153.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:44:39,070 INFO L168 Benchmark]: RCFGBuilder took 195.53 ms. Allocated memory is still 175.1 MB. Free memory was 153.2 MB in the beginning and 140.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:44:39,070 INFO L168 Benchmark]: TraceAbstraction took 745202.30 ms. Allocated memory was 175.1 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 139.6 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-06 15:44:39,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 175.1 MB. Free memory is still 156.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.19 ms. Allocated memory is still 175.1 MB. Free memory was 155.8 MB in the beginning and 154.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.77 ms. Allocated memory is still 175.1 MB. Free memory was 154.3 MB in the beginning and 153.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 195.53 ms. Allocated memory is still 175.1 MB. Free memory was 153.2 MB in the beginning and 140.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 745202.30 ms. Allocated memory was 175.1 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 139.6 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 745139.2ms, OverallIterations: 151, TraceHistogramMax: 5, EmptinessCheckTime: 2102.0ms, AutomataDifference: 254723.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10033 SDtfs, 77982 SDslu, 103093 SDs, 0 SdLazy, 137427 SolverSat, 12747 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 71189.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15164 GetRequests, 3971 SyntacticMatches, 68 SemanticMatches, 11125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375576 ImplicationChecksByTransitivity, 165388.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20823occurred in iteration=150, InterpolantAutomatonStates: 10345, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40697.6ms AutomataMinimizationTime, 150 MinimizatonAttempts, 1434897 StatesRemovedByMinimization, 149 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 518.5ms SsaConstructionTime, 2078.7ms SatisfiabilityAnalysisTime, 84810.2ms InterpolantComputationTime, 9858 NumberOfCodeBlocks, 9817 NumberOfCodeBlocksAsserted, 633 NumberOfCheckSat, 9560 ConstructedInterpolants, 344 QuantifiedInterpolants, 81681 SizeOfPredicates, 572 NumberOfNonLiveVariables, 10335 ConjunctsInSsa, 1809 ConjunctsInUnsatCore, 298 InterpolantComputations, 2 PerfectInterpolantSequences, 2450/6329 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown