/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/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:58:59,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:58:59,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:58:59,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:59:00,039 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 14:59:00,068 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:59:00,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:59:00,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:59:00,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:59:00,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:59:00,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:59:00,069 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:59:00,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:59:00,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:59:00,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:59:00,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:59:00,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:59:00,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:59:00,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:59:00,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:59:00,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:59:00,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:59:00,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:59:00,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:59:00,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:59:00,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:59:00,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:59:00,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:59:00,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:59:00,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:59:00,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:59:00,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:59:00,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:59:00,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:59:00,072 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:59:00,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:59:00,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:59:00,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:59:00,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:59:00,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:59:00,331 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:59:00,332 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:59:00,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-08-06 14:59:00,333 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-08-06 14:59:00,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:59:00,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:59:00,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:59:00,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:59:00,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:59:00,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:59:00,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:59:00,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:59:00,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:59:00,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:59:00,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:59:00,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:59:00,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:59:00,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/1) ... [2021-08-06 14:59:00,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:59:00,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:00,426 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 14:59:00,434 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 14:59:00,460 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:59:00,460 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:59:00,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:59:00,460 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:59:00,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:59:00,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:59:00,461 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:59:00,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:59:00,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:59:00,462 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 14:59:00,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:59:00,623 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:59:00,624 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:59:00 BoogieIcfgContainer [2021-08-06 14:59:00,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:59:00,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:59:00,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:59:00,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:59:00,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:59:00" (1/2) ... [2021-08-06 14:59:00,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bb8cc3 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:59:00, skipping insertion in model container [2021-08-06 14:59:00,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:59:00" (2/2) ... [2021-08-06 14:59:00,629 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-08-06 14:59:00,632 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:59:00,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:59:00,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:59:00,633 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:59:00,679 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 14:59:00,713 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:59:00,720 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 14:59:00,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 14:59:00,726 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-08-06 14:59:00,741 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:59:00,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:00,748 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:00,748 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:00,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:00,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1960784707, now seen corresponding path program 1 times [2021-08-06 14:59:00,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:00,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522892716] [2021-08-06 14:59:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:00,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:00,915 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 14:59:00,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:00,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522892716] [2021-08-06 14:59:00,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522892716] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:59:00,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:59:00,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:59:00,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731791197] [2021-08-06 14:59:00,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:59:00,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:59:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:59:00,934 INFO L87 Difference]: Start difference. First operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:00,970 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-08-06 14:59:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:59:00,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:59:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:00,980 INFO L225 Difference]: With dead ends: 84 [2021-08-06 14:59:00,980 INFO L226 Difference]: Without dead ends: 84 [2021-08-06 14:59:00,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:59:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-06 14:59:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-08-06 14:59:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-08-06 14:59:01,020 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-08-06 14:59:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:01,020 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-08-06 14:59:01,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-08-06 14:59:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:59:01,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:01,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:01,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:59:01,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash 273858138, now seen corresponding path program 1 times [2021-08-06 14:59:01,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:01,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344926865] [2021-08-06 14:59:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:01,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:01,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:01,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344926865] [2021-08-06 14:59:01,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344926865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:01,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305960650] [2021-08-06 14:59:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:01,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:01,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:01,303 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 14:59:01,320 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 14:59:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:01,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:59:01,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:01,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305960650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:01,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:01,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 14:59:01,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654881163] [2021-08-06 14:59:01,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:59:01,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:59:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:59:01,888 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:02,194 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2021-08-06 14:59:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:59:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:59:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:02,200 INFO L225 Difference]: With dead ends: 197 [2021-08-06 14:59:02,200 INFO L226 Difference]: Without dead ends: 188 [2021-08-06 14:59:02,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:59:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-06 14:59:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2021-08-06 14:59:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 112 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 216 transitions. [2021-08-06 14:59:02,218 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 216 transitions. Word has length 19 [2021-08-06 14:59:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:02,218 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 216 transitions. [2021-08-06 14:59:02,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 216 transitions. [2021-08-06 14:59:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:59:02,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:02,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:02,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 14:59:02,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:02,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1123313272, now seen corresponding path program 2 times [2021-08-06 14:59:02,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:02,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005001010] [2021-08-06 14:59:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:02,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:02,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:02,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005001010] [2021-08-06 14:59:02,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005001010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:02,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755161646] [2021-08-06 14:59:02,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:02,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:02,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:02,571 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 14:59:02,572 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 14:59:02,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:02,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:59:02,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:02,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755161646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:02,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:02,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:59:02,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44334795] [2021-08-06 14:59:02,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:59:02,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:02,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:59:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:59:02,970 INFO L87 Difference]: Start difference. First operand 113 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:03,180 INFO L93 Difference]: Finished difference Result 233 states and 445 transitions. [2021-08-06 14:59:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:59:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:59:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:03,182 INFO L225 Difference]: With dead ends: 233 [2021-08-06 14:59:03,182 INFO L226 Difference]: Without dead ends: 224 [2021-08-06 14:59:03,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:59:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-06 14:59:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 117. [2021-08-06 14:59:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 228 transitions. [2021-08-06 14:59:03,188 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 228 transitions. Word has length 19 [2021-08-06 14:59:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:03,188 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 228 transitions. [2021-08-06 14:59:03,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 228 transitions. [2021-08-06 14:59:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:59:03,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:03,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:03,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:03,410 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,SelfDestructingSolverStorable2 [2021-08-06 14:59:03,410 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:03,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1992490104, now seen corresponding path program 3 times [2021-08-06 14:59:03,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:03,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846236646] [2021-08-06 14:59:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:03,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:03,437 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 14:59:03,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:03,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846236646] [2021-08-06 14:59:03,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846236646] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:59:03,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:59:03,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:59:03,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498601720] [2021-08-06 14:59:03,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:59:03,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:59:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:59:03,439 INFO L87 Difference]: Start difference. First operand 117 states and 228 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:03,443 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2021-08-06 14:59:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:59:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:59:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:03,444 INFO L225 Difference]: With dead ends: 120 [2021-08-06 14:59:03,444 INFO L226 Difference]: Without dead ends: 120 [2021-08-06 14:59:03,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:59:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-06 14:59:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-08-06 14:59:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9327731092436975) internal successors, (230), 119 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 230 transitions. [2021-08-06 14:59:03,448 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 230 transitions. Word has length 19 [2021-08-06 14:59:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:03,448 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 230 transitions. [2021-08-06 14:59:03,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 230 transitions. [2021-08-06 14:59:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:59:03,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:03,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:03,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:59:03,449 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash -928935378, now seen corresponding path program 4 times [2021-08-06 14:59:03,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:03,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898257919] [2021-08-06 14:59:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:03,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:03,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:03,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898257919] [2021-08-06 14:59:03,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898257919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:03,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135264613] [2021-08-06 14:59:03,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:03,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:03,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:03,562 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 14:59:03,563 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 14:59:03,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:03,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:59:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:03,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135264613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:03,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:03,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 14:59:03,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060240346] [2021-08-06 14:59:03,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:59:03,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:59:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:59:03,902 INFO L87 Difference]: Start difference. First operand 120 states and 230 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:04,073 INFO L93 Difference]: Finished difference Result 175 states and 327 transitions. [2021-08-06 14:59:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:59:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:59:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:04,075 INFO L225 Difference]: With dead ends: 175 [2021-08-06 14:59:04,075 INFO L226 Difference]: Without dead ends: 168 [2021-08-06 14:59:04,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:59:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-06 14:59:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 114. [2021-08-06 14:59:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2021-08-06 14:59:04,079 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 19 [2021-08-06 14:59:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:04,079 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2021-08-06 14:59:04,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2021-08-06 14:59:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:59:04,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:04,080 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 14:59:04,101 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 14:59:04,292 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 14:59:04,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash -171096099, now seen corresponding path program 1 times [2021-08-06 14:59:04,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:04,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747804728] [2021-08-06 14:59:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:04,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:04,336 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 14:59:04,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:04,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747804728] [2021-08-06 14:59:04,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747804728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:04,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179418100] [2021-08-06 14:59:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:04,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:04,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:04,338 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 14:59:04,346 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 14:59:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:04,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:59:04,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:04,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:04,574 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 14:59:04,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179418100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:04,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:04,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 14:59:04,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137676633] [2021-08-06 14:59:04,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:59:04,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:59:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:59:04,575 INFO L87 Difference]: Start difference. First operand 114 states and 217 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 14:59:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:04,630 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2021-08-06 14:59:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:59:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 14:59:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:04,631 INFO L225 Difference]: With dead ends: 152 [2021-08-06 14:59:04,631 INFO L226 Difference]: Without dead ends: 152 [2021-08-06 14:59:04,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:59:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-06 14:59:04,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2021-08-06 14:59:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2021-08-06 14:59:04,636 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 22 [2021-08-06 14:59:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:04,636 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2021-08-06 14:59:04,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 14:59:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2021-08-06 14:59:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:59:04,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:04,637 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:04,653 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 14:59:04,848 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 14:59:04,849 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash -506947209, now seen corresponding path program 5 times [2021-08-06 14:59:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:04,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757927864] [2021-08-06 14:59:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:04,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:04,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:04,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757927864] [2021-08-06 14:59:04,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757927864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:04,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870653541] [2021-08-06 14:59:04,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:04,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:04,893 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 14:59:04,895 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 14:59:05,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:59:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:59:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:05,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870653541] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:59:05,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:59:05,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-08-06 14:59:05,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28925828] [2021-08-06 14:59:05,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:59:05,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:59:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:59:05,107 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:05,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:05,117 INFO L93 Difference]: Finished difference Result 288 states and 559 transitions. [2021-08-06 14:59:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:59:05,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:59:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:05,119 INFO L225 Difference]: With dead ends: 288 [2021-08-06 14:59:05,119 INFO L226 Difference]: Without dead ends: 257 [2021-08-06 14:59:05,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:59:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-06 14:59:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 223. [2021-08-06 14:59:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2021-08-06 14:59:05,125 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 23 [2021-08-06 14:59:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:05,125 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2021-08-06 14:59:05,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2021-08-06 14:59:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:05,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:05,127 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] [2021-08-06 14:59:05,145 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 14:59:05,341 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 14:59:05,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash 202156410, now seen corresponding path program 2 times [2021-08-06 14:59:05,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:05,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767272785] [2021-08-06 14:59:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:05,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:05,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:05,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767272785] [2021-08-06 14:59:05,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767272785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:05,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019335367] [2021-08-06 14:59:05,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:05,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:05,547 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 14:59:05,581 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 14:59:05,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:05,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:05,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:05,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:06,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019335367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:06,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:06,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-08-06 14:59:06,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550927305] [2021-08-06 14:59:06,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:59:06,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:59:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:59:06,096 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:06,566 INFO L93 Difference]: Finished difference Result 313 states and 606 transitions. [2021-08-06 14:59:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:59:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:06,569 INFO L225 Difference]: With dead ends: 313 [2021-08-06 14:59:06,569 INFO L226 Difference]: Without dead ends: 281 [2021-08-06 14:59:06,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:59:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-06 14:59:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 246. [2021-08-06 14:59:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0081632653061225) internal successors, (492), 245 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 492 transitions. [2021-08-06 14:59:06,577 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 492 transitions. Word has length 26 [2021-08-06 14:59:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:06,577 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 492 transitions. [2021-08-06 14:59:06,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 492 transitions. [2021-08-06 14:59:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:06,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:06,582 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] [2021-08-06 14:59:06,601 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 14:59:06,783 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 14:59:06,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1479948104, now seen corresponding path program 3 times [2021-08-06 14:59:06,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:06,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008261740] [2021-08-06 14:59:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:06,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:06,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:06,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008261740] [2021-08-06 14:59:06,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008261740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:06,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951323940] [2021-08-06 14:59:06,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:06,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:06,999 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 14:59:07,000 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 14:59:07,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:59:07,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:07,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:07,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951323940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:07,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:07,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-06 14:59:07,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378000633] [2021-08-06 14:59:07,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:59:07,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:59:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:59:07,638 INFO L87 Difference]: Start difference. First operand 246 states and 492 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:59:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:08,153 INFO L93 Difference]: Finished difference Result 346 states and 668 transitions. [2021-08-06 14:59:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:59:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 26 [2021-08-06 14:59:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:08,154 INFO L225 Difference]: With dead ends: 346 [2021-08-06 14:59:08,154 INFO L226 Difference]: Without dead ends: 314 [2021-08-06 14:59:08,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 479.2ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-06 14:59:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 252. [2021-08-06 14:59:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0199203187250996) internal successors, (507), 251 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 507 transitions. [2021-08-06 14:59:08,160 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 507 transitions. Word has length 26 [2021-08-06 14:59:08,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:08,160 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 507 transitions. [2021-08-06 14:59:08,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:59:08,160 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 507 transitions. [2021-08-06 14:59:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:08,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:08,161 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] [2021-08-06 14:59:08,180 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 14:59:08,376 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 14:59:08,377 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 828023674, now seen corresponding path program 4 times [2021-08-06 14:59:08,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:08,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849013592] [2021-08-06 14:59:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:08,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:08,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:08,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849013592] [2021-08-06 14:59:08,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849013592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:08,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25735552] [2021-08-06 14:59:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:08,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:08,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:08,613 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 14:59:08,614 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 14:59:08,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:08,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:08,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:08,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:09,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25735552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:09,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:09,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-06 14:59:09,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111840935] [2021-08-06 14:59:09,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:59:09,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:59:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:59:09,249 INFO L87 Difference]: Start difference. First operand 252 states and 507 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:59:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:09,879 INFO L93 Difference]: Finished difference Result 365 states and 705 transitions. [2021-08-06 14:59:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:59:09,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 26 [2021-08-06 14:59:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:09,880 INFO L225 Difference]: With dead ends: 365 [2021-08-06 14:59:09,880 INFO L226 Difference]: Without dead ends: 333 [2021-08-06 14:59:09,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-08-06 14:59:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 253. [2021-08-06 14:59:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0198412698412698) internal successors, (509), 252 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 509 transitions. [2021-08-06 14:59:09,891 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 509 transitions. Word has length 26 [2021-08-06 14:59:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:09,892 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 509 transitions. [2021-08-06 14:59:09,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:59:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 509 transitions. [2021-08-06 14:59:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:09,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:09,892 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] [2021-08-06 14:59:09,910 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 14:59:10,104 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 14:59:10,105 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2040701256, now seen corresponding path program 5 times [2021-08-06 14:59:10,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:10,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736096534] [2021-08-06 14:59:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:10,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:10,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:10,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736096534] [2021-08-06 14:59:10,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736096534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:10,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392642292] [2021-08-06 14:59:10,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:10,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:10,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:10,325 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 14:59:10,327 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 14:59:10,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:59:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:10,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392642292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:10,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:10,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-06 14:59:10,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351011398] [2021-08-06 14:59:10,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:59:10,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:59:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:59:10,986 INFO L87 Difference]: Start difference. First operand 253 states and 509 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:59:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:11,644 INFO L93 Difference]: Finished difference Result 405 states and 784 transitions. [2021-08-06 14:59:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:59:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 26 [2021-08-06 14:59:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:11,647 INFO L225 Difference]: With dead ends: 405 [2021-08-06 14:59:11,647 INFO L226 Difference]: Without dead ends: 373 [2021-08-06 14:59:11,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:59:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-06 14:59:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 257. [2021-08-06 14:59:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-08-06 14:59:11,654 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-08-06 14:59:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:11,654 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-08-06 14:59:11,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:59:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-08-06 14:59:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:11,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:11,656 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] [2021-08-06 14:59:11,676 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 14:59:11,868 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 14:59:11,869 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2105111822, now seen corresponding path program 6 times [2021-08-06 14:59:11,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:11,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902415836] [2021-08-06 14:59:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:11,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:12,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:12,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902415836] [2021-08-06 14:59:12,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902415836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:12,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494207030] [2021-08-06 14:59:12,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:12,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:12,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:12,093 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 14:59:12,093 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 14:59:12,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:59:12,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:12,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 14:59:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:12,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494207030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:12,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:12,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:12,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812382803] [2021-08-06 14:59:12,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:12,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:12,837 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:13,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:13,324 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-08-06 14:59:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:59:13,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:13,326 INFO L225 Difference]: With dead ends: 321 [2021-08-06 14:59:13,326 INFO L226 Difference]: Without dead ends: 293 [2021-08-06 14:59:13,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-06 14:59:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-08-06 14:59:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-08-06 14:59:13,331 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-08-06 14:59:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-08-06 14:59:13,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-08-06 14:59:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:13,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:13,332 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] [2021-08-06 14:59:13,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:13,540 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 14:59:13,541 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1872047740, now seen corresponding path program 7 times [2021-08-06 14:59:13,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:13,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055740654] [2021-08-06 14:59:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:13,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:13,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:13,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055740654] [2021-08-06 14:59:13,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055740654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:13,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076354619] [2021-08-06 14:59:13,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:13,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:13,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:13,733 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 14:59:13,734 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 14:59:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:14,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 14:59:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:14,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076354619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:14,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:14,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:14,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95002387] [2021-08-06 14:59:14,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:14,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:14,453 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:14,881 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-08-06 14:59:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:59:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:14,883 INFO L225 Difference]: With dead ends: 349 [2021-08-06 14:59:14,883 INFO L226 Difference]: Without dead ends: 317 [2021-08-06 14:59:14,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:59:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-06 14:59:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-08-06 14:59:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-08-06 14:59:14,888 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-08-06 14:59:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:14,888 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-08-06 14:59:14,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-08-06 14:59:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:14,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:14,889 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] [2021-08-06 14:59:14,906 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 14:59:15,092 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 14:59:15,093 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash -114947778, now seen corresponding path program 8 times [2021-08-06 14:59:15,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:15,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790084887] [2021-08-06 14:59:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:15,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:15,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:15,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790084887] [2021-08-06 14:59:15,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790084887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:15,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305527989] [2021-08-06 14:59:15,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:15,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:15,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:15,267 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 14:59:15,268 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 14:59:15,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:15,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:15,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:15,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:15,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:16,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305527989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:16,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:16,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:16,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54455587] [2021-08-06 14:59:16,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:16,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:16,026 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:16,494 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-08-06 14:59:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:59:16,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:16,496 INFO L225 Difference]: With dead ends: 386 [2021-08-06 14:59:16,496 INFO L226 Difference]: Without dead ends: 354 [2021-08-06 14:59:16,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:59:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-06 14:59:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-08-06 14:59:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-08-06 14:59:16,501 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-08-06 14:59:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:16,501 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-08-06 14:59:16,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-08-06 14:59:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:16,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:16,502 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] [2021-08-06 14:59:16,521 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 14:59:16,718 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 14:59:16,719 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1311294588, now seen corresponding path program 9 times [2021-08-06 14:59:16,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:16,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069724184] [2021-08-06 14:59:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:16,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:16,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:16,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069724184] [2021-08-06 14:59:16,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069724184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:16,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300785136] [2021-08-06 14:59:16,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:16,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:16,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:16,943 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 14:59:16,943 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 14:59:17,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:59:17,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:17,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:17,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 14:59:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:17,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300785136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:17,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:17,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:17,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213935433] [2021-08-06 14:59:17,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:17,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:17,711 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:18,417 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-08-06 14:59:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:59:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:18,419 INFO L225 Difference]: With dead ends: 429 [2021-08-06 14:59:18,419 INFO L226 Difference]: Without dead ends: 397 [2021-08-06 14:59:18,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:59:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-08-06 14:59:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-08-06 14:59:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-08-06 14:59:18,426 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-08-06 14:59:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:18,427 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-08-06 14:59:18,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-08-06 14:59:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:18,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:18,427 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] [2021-08-06 14:59:18,444 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 14:59:18,637 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 14:59:18,638 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash 290845078, now seen corresponding path program 10 times [2021-08-06 14:59:18,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:18,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795798221] [2021-08-06 14:59:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:18,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:18,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:18,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795798221] [2021-08-06 14:59:18,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795798221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:18,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647210319] [2021-08-06 14:59:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:18,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:18,828 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 14:59:18,829 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 14:59:19,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:19,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:19,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647210319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:19,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:19,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:19,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951987159] [2021-08-06 14:59:19,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:19,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:19,665 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:20,105 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-08-06 14:59:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:59:20,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:20,106 INFO L225 Difference]: With dead ends: 331 [2021-08-06 14:59:20,106 INFO L226 Difference]: Without dead ends: 303 [2021-08-06 14:59:20,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-06 14:59:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-08-06 14:59:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-08-06 14:59:20,111 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-08-06 14:59:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:20,111 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-08-06 14:59:20,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-08-06 14:59:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:20,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:20,112 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] [2021-08-06 14:59:20,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 14:59:20,324 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 14:59:20,325 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:20,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1233884658, now seen corresponding path program 11 times [2021-08-06 14:59:20,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:20,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247637912] [2021-08-06 14:59:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:20,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:20,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:20,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247637912] [2021-08-06 14:59:20,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247637912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:20,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589727773] [2021-08-06 14:59:20,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:20,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:20,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:20,516 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 14:59:20,516 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 14:59:20,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:59:20,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:20,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:20,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 14:59:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:21,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589727773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:21,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:21,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:21,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488449009] [2021-08-06 14:59:21,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:21,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:21,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:21,383 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:21,855 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-08-06 14:59:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:59:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:21,856 INFO L225 Difference]: With dead ends: 355 [2021-08-06 14:59:21,856 INFO L226 Difference]: Without dead ends: 323 [2021-08-06 14:59:21,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:59:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-08-06 14:59:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-08-06 14:59:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-08-06 14:59:21,861 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-08-06 14:59:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:21,861 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-08-06 14:59:21,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-08-06 14:59:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:21,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:21,862 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] [2021-08-06 14:59:21,882 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 14:59:22,076 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 14:59:22,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash -753110860, now seen corresponding path program 12 times [2021-08-06 14:59:22,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:22,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025124032] [2021-08-06 14:59:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:22,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:22,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:22,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025124032] [2021-08-06 14:59:22,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025124032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:22,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204854039] [2021-08-06 14:59:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:22,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:22,268 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 14:59:22,269 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 14:59:22,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:59:22,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:22,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:23,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204854039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:23,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:23,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:23,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124775357] [2021-08-06 14:59:23,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:23,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:23,135 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:23,622 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-08-06 14:59:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:59:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:23,624 INFO L225 Difference]: With dead ends: 392 [2021-08-06 14:59:23,624 INFO L226 Difference]: Without dead ends: 360 [2021-08-06 14:59:23,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:59:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-06 14:59:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-08-06 14:59:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-08-06 14:59:23,628 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-08-06 14:59:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:23,629 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-08-06 14:59:23,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-08-06 14:59:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:23,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:23,629 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] [2021-08-06 14:59:23,646 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 14:59:23,845 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 14:59:23,845 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash 673131506, now seen corresponding path program 13 times [2021-08-06 14:59:23,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:23,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789295177] [2021-08-06 14:59:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:23,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:24,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:24,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789295177] [2021-08-06 14:59:24,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789295177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:24,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081275079] [2021-08-06 14:59:24,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:24,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:24,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:24,029 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 14:59:24,030 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 14:59:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081275079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:24,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:24,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:24,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099629134] [2021-08-06 14:59:24,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:24,935 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:25,522 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-08-06 14:59:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:59:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:25,524 INFO L225 Difference]: With dead ends: 435 [2021-08-06 14:59:25,524 INFO L226 Difference]: Without dead ends: 403 [2021-08-06 14:59:25,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 551.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:59:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-06 14:59:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-08-06 14:59:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-08-06 14:59:25,532 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-08-06 14:59:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:25,532 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-08-06 14:59:25,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-08-06 14:59:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:25,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:25,533 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] [2021-08-06 14:59:25,552 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 14:59:25,744 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 14:59:25,745 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -347318004, now seen corresponding path program 14 times [2021-08-06 14:59:25,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:25,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705808625] [2021-08-06 14:59:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:25,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:25,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:25,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705808625] [2021-08-06 14:59:25,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705808625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:25,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950045311] [2021-08-06 14:59:25,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:25,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:25,919 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 14:59:25,920 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 14:59:26,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:26,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:26,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:26,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950045311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:26,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:26,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:26,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603466549] [2021-08-06 14:59:26,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:26,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:26,870 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:27,310 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-08-06 14:59:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:59:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:27,311 INFO L225 Difference]: With dead ends: 337 [2021-08-06 14:59:27,312 INFO L226 Difference]: Without dead ends: 309 [2021-08-06 14:59:27,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-06 14:59:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-08-06 14:59:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-08-06 14:59:27,316 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-08-06 14:59:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:27,316 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-08-06 14:59:27,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-08-06 14:59:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:27,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:27,317 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] [2021-08-06 14:59:27,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 14:59:27,530 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 14:59:27,531 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:27,531 INFO L82 PathProgramCache]: Analyzing trace with hash 601747836, now seen corresponding path program 15 times [2021-08-06 14:59:27,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:27,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922240843] [2021-08-06 14:59:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:27,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:27,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:27,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922240843] [2021-08-06 14:59:27,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922240843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:27,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077282405] [2021-08-06 14:59:27,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:27,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:27,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:27,741 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 14:59:27,743 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 14:59:28,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:59:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:28,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:59:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:28,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:28,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077282405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:28,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:28,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:28,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318657411] [2021-08-06 14:59:28,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:28,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:28,800 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:29,258 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-08-06 14:59:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:59:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:29,265 INFO L225 Difference]: With dead ends: 343 [2021-08-06 14:59:29,265 INFO L226 Difference]: Without dead ends: 311 [2021-08-06 14:59:29,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:59:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-06 14:59:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-08-06 14:59:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-08-06 14:59:29,269 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-08-06 14:59:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:29,270 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-08-06 14:59:29,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-08-06 14:59:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:29,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:29,270 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] [2021-08-06 14:59:29,292 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 14:59:29,488 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 14:59:29,489 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:29,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1385247682, now seen corresponding path program 16 times [2021-08-06 14:59:29,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:29,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172238409] [2021-08-06 14:59:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:29,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:29,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:29,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172238409] [2021-08-06 14:59:29,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172238409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:29,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913954962] [2021-08-06 14:59:29,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:29,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:29,665 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 14:59:29,688 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 14:59:30,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:30,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:30,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:30,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:30,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:30,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913954962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:30,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:30,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:30,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110092443] [2021-08-06 14:59:30,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:30,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:30,773 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:31,261 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-08-06 14:59:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:59:31,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:31,263 INFO L225 Difference]: With dead ends: 378 [2021-08-06 14:59:31,263 INFO L226 Difference]: Without dead ends: 346 [2021-08-06 14:59:31,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:59:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-06 14:59:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-08-06 14:59:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-08-06 14:59:31,267 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-08-06 14:59:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:31,267 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-08-06 14:59:31,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-08-06 14:59:31,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:31,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:31,268 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] [2021-08-06 14:59:31,288 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 14:59:31,468 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 14:59:31,468 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash 40994684, now seen corresponding path program 17 times [2021-08-06 14:59:31,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:31,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490365759] [2021-08-06 14:59:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:31,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:31,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:31,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490365759] [2021-08-06 14:59:31,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490365759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:31,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334289760] [2021-08-06 14:59:31,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:31,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:31,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:31,650 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 14:59:31,656 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 14:59:32,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:59:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:32,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:32,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334289760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:32,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:32,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:32,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140108536] [2021-08-06 14:59:32,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:32,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:32,771 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:33,441 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-08-06 14:59:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:59:33,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:33,443 INFO L225 Difference]: With dead ends: 410 [2021-08-06 14:59:33,443 INFO L226 Difference]: Without dead ends: 378 [2021-08-06 14:59:33,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:59:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-06 14:59:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-08-06 14:59:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-08-06 14:59:33,447 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-08-06 14:59:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:33,447 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-08-06 14:59:33,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-08-06 14:59:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:59:33,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:33,448 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] [2021-08-06 14:59:33,467 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 14:59:33,661 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 14:59:33,661 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:33,661 INFO L82 PathProgramCache]: Analyzing trace with hash -979454826, now seen corresponding path program 18 times [2021-08-06 14:59:33,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:33,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090625143] [2021-08-06 14:59:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:33,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:33,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:33,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090625143] [2021-08-06 14:59:33,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090625143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:33,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691303850] [2021-08-06 14:59:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:33,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:33,840 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 14:59:33,841 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 14:59:34,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:59:34,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:59:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:34,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:34,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691303850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:34,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:34,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 14:59:34,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817237034] [2021-08-06 14:59:34,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:59:34,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:59:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:59:34,986 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:35,485 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-08-06 14:59:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:59:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:59:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:35,487 INFO L225 Difference]: With dead ends: 307 [2021-08-06 14:59:35,487 INFO L226 Difference]: Without dead ends: 279 [2021-08-06 14:59:35,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:59:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-06 14:59:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-08-06 14:59:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-08-06 14:59:35,490 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-08-06 14:59:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:35,490 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-08-06 14:59:35,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-08-06 14:59:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:59:35,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:35,491 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:35,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:35,705 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 14:59:35,705 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1446761785, now seen corresponding path program 19 times [2021-08-06 14:59:35,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:35,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027793190] [2021-08-06 14:59:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:35,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:35,766 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 14:59:35,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:35,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027793190] [2021-08-06 14:59:35,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027793190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:35,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349584119] [2021-08-06 14:59:35,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:35,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:35,768 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 14:59:35,781 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 14:59:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:59:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:36,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:59:36,605 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 14:59:36,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349584119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:36,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:36,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 14:59:36,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818384105] [2021-08-06 14:59:36,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:59:36,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:59:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:59:36,606 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:36,775 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-08-06 14:59:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:59:36,777 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:59:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:36,777 INFO L225 Difference]: With dead ends: 362 [2021-08-06 14:59:36,778 INFO L226 Difference]: Without dead ends: 362 [2021-08-06 14:59:36,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:59:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-06 14:59:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-08-06 14:59:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-08-06 14:59:36,781 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-08-06 14:59:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:36,781 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-08-06 14:59:36,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-08-06 14:59:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 14:59:36,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:36,782 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:36,802 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 14:59:36,996 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 14:59:36,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1247278231, now seen corresponding path program 20 times [2021-08-06 14:59:36,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:36,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013209748] [2021-08-06 14:59:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:36,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:37,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:37,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013209748] [2021-08-06 14:59:37,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013209748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:37,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88280123] [2021-08-06 14:59:37,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:37,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:37,033 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 14:59:37,034 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 14:59:37,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:37,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:37,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:59:37,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:37,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88280123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:37,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:37,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:59:37,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970001202] [2021-08-06 14:59:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:59:37,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:59:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:59:37,848 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:37,861 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-08-06 14:59:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:59:37,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 14:59:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:37,863 INFO L225 Difference]: With dead ends: 534 [2021-08-06 14:59:37,863 INFO L226 Difference]: Without dead ends: 491 [2021-08-06 14:59:37,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:59:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-06 14:59:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-08-06 14:59:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-08-06 14:59:37,869 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-08-06 14:59:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:37,869 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-08-06 14:59:37,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-08-06 14:59:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:59:37,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:37,869 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:37,889 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 14:59:38,077 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 14:59:38,077 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:38,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:38,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1300048086, now seen corresponding path program 21 times [2021-08-06 14:59:38,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:38,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026991123] [2021-08-06 14:59:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:38,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:38,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:38,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026991123] [2021-08-06 14:59:38,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026991123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:38,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915680144] [2021-08-06 14:59:38,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:38,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:38,439 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 14:59:38,439 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 14:59:39,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:59:39,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:59:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:39,578 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:39,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915680144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:39,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:39,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-08-06 14:59:39,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743552199] [2021-08-06 14:59:39,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 14:59:39,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 14:59:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:59:39,798 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 14:59:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:40,585 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-08-06 14:59:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:59:40,586 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 33 [2021-08-06 14:59:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:40,587 INFO L225 Difference]: With dead ends: 550 [2021-08-06 14:59:40,587 INFO L226 Difference]: Without dead ends: 502 [2021-08-06 14:59:40,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 744.6ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:59:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-06 14:59:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-08-06 14:59:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-08-06 14:59:40,593 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-08-06 14:59:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:40,593 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-08-06 14:59:40,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 14:59:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-08-06 14:59:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:59:40,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:40,594 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:40,613 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 14:59:40,801 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 14:59:40,801 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2063366420, now seen corresponding path program 22 times [2021-08-06 14:59:40,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:40,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119354182] [2021-08-06 14:59:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:40,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:41,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:41,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119354182] [2021-08-06 14:59:41,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119354182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:41,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370410402] [2021-08-06 14:59:41,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:41,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:41,166 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 14:59:41,166 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 14:59:41,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:41,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:41,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:59:41,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:42,391 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 14:59:42,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 14:59:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:42,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370410402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:42,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:42,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-08-06 14:59:42,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958993953] [2021-08-06 14:59:42,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 14:59:42,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 14:59:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:59:42,600 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:43,590 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-08-06 14:59:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:59:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-08-06 14:59:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:43,592 INFO L225 Difference]: With dead ends: 574 [2021-08-06 14:59:43,592 INFO L226 Difference]: Without dead ends: 526 [2021-08-06 14:59:43,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 14:59:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-08-06 14:59:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-08-06 14:59:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 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 14:59:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-08-06 14:59:43,598 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-08-06 14:59:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:43,598 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-08-06 14:59:43,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-08-06 14:59:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:59:43,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:43,599 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:43,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 14:59:43,805 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 14:59:43,806 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:43,806 INFO L82 PathProgramCache]: Analyzing trace with hash -952229162, now seen corresponding path program 23 times [2021-08-06 14:59:43,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:43,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027062683] [2021-08-06 14:59:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:43,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:44,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:44,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027062683] [2021-08-06 14:59:44,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027062683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:44,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118901901] [2021-08-06 14:59:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:44,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:44,153 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 14:59:44,154 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 14:59:44,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:59:44,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:44,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:59:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:45,456 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:45,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:45,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118901901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:45,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:45,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 14:59:45,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740396023] [2021-08-06 14:59:45,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 14:59:45,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 14:59:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:59:45,711 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:46,660 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-08-06 14:59:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:59:46,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:59:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:46,662 INFO L225 Difference]: With dead ends: 599 [2021-08-06 14:59:46,662 INFO L226 Difference]: Without dead ends: 551 [2021-08-06 14:59:46,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 950.9ms TimeCoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 14:59:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-06 14:59:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-08-06 14:59:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-08-06 14:59:46,668 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-08-06 14:59:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:46,668 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-08-06 14:59:46,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-08-06 14:59:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:59:46,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:46,669 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:46,687 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 14:59:46,884 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 14:59:46,885 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash 433393428, now seen corresponding path program 24 times [2021-08-06 14:59:46,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:46,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49846201] [2021-08-06 14:59:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:46,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:47,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:47,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49846201] [2021-08-06 14:59:47,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49846201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:47,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79529043] [2021-08-06 14:59:47,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:47,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:47,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:47,231 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 14:59:47,233 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 14:59:48,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:59:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:48,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 14:59:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:48,608 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:48,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:48,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79529043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:48,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:48,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-08-06 14:59:48,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614518531] [2021-08-06 14:59:48,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 14:59:48,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 14:59:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:59:48,819 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:49,895 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-08-06 14:59:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:59:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-08-06 14:59:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:49,897 INFO L225 Difference]: With dead ends: 637 [2021-08-06 14:59:49,897 INFO L226 Difference]: Without dead ends: 589 [2021-08-06 14:59:49,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 992.1ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 14:59:49,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-06 14:59:49,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-08-06 14:59:49,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-08-06 14:59:49,904 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-08-06 14:59:49,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:49,904 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-08-06 14:59:49,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:49,904 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-08-06 14:59:49,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:59:49,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:49,905 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:49,927 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 14:59:50,120 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 14:59:50,121 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash -207717162, now seen corresponding path program 25 times [2021-08-06 14:59:50,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:50,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973551314] [2021-08-06 14:59:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:50,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:50,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:50,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973551314] [2021-08-06 14:59:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973551314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:50,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793823664] [2021-08-06 14:59:50,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:50,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:50,444 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 14:59:50,444 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 14:59:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:59:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:51,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:52,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793823664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:52,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:52,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-08-06 14:59:52,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634092875] [2021-08-06 14:59:52,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 14:59:52,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 14:59:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:59:52,033 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:53,311 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-08-06 14:59:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:59:53,311 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-08-06 14:59:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:53,313 INFO L225 Difference]: With dead ends: 678 [2021-08-06 14:59:53,313 INFO L226 Difference]: Without dead ends: 646 [2021-08-06 14:59:53,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 14:59:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-08-06 14:59:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-08-06 14:59:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-08-06 14:59:53,321 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-08-06 14:59:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:53,321 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-08-06 14:59:53,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-08-06 14:59:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:59:53,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:53,322 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:53,341 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 14:59:53,532 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 14:59:53,533 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:53,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1218525204, now seen corresponding path program 26 times [2021-08-06 14:59:53,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:53,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008710345] [2021-08-06 14:59:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:53,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:53,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:53,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008710345] [2021-08-06 14:59:53,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008710345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:53,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973960197] [2021-08-06 14:59:53,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:53,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:53,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:53,867 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 14:59:53,867 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 14:59:54,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:54,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:59:54,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:55,220 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 14:59:55,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 14:59:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:55,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973960197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:55,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:55,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-08-06 14:59:55,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413686692] [2021-08-06 14:59:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 14:59:55,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 14:59:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:59:55,493 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:57,076 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-08-06 14:59:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 14:59:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-08-06 14:59:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:57,078 INFO L225 Difference]: With dead ends: 758 [2021-08-06 14:59:57,078 INFO L226 Difference]: Without dead ends: 714 [2021-08-06 14:59:57,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1281.6ms TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 14:59:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-08-06 14:59:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-08-06 14:59:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-08-06 14:59:57,085 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-08-06 14:59:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:57,085 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-08-06 14:59:57,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 14:59:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-08-06 14:59:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:59:57,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:57,086 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:57,107 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 14:59:57,304 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 14:59:57,305 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:59:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:57,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2042732976, now seen corresponding path program 27 times [2021-08-06 14:59:57,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:57,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500638906] [2021-08-06 14:59:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:57,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:57,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:57,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500638906] [2021-08-06 14:59:57,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500638906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:57,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892269901] [2021-08-06 14:59:57,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:57,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:57,634 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 14:59:57,635 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 14:59:58,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:59:58,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 14:59:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:59,143 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 14:59:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 14:59:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:59,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892269901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:59,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:59,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 14:59:59,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399363912] [2021-08-06 14:59:59,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 14:59:59,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 14:59:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:59:59,498 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:00,396 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-08-06 15:00:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:00:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:00,398 INFO L225 Difference]: With dead ends: 566 [2021-08-06 15:00:00,398 INFO L226 Difference]: Without dead ends: 538 [2021-08-06 15:00:00,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:00:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-06 15:00:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-08-06 15:00:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-08-06 15:00:00,405 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-08-06 15:00:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:00,405 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-08-06 15:00:00,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-08-06 15:00:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:00,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:00,406 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:00,425 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 15:00:00,624 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 15:00:00,625 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash -11051816, now seen corresponding path program 28 times [2021-08-06 15:00:00,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:00,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992515880] [2021-08-06 15:00:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:00,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:00,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:00,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992515880] [2021-08-06 15:00:00,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992515880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:00,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126903967] [2021-08-06 15:00:00,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:00:00,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:00,958 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 15:00:00,958 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 15:00:01,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:00:01,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:02,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:02,688 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:02,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:02,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126903967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:02,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:02,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:02,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135441908] [2021-08-06 15:00:02,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:02,917 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:03,811 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-08-06 15:00:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:00:03,811 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:03,812 INFO L225 Difference]: With dead ends: 581 [2021-08-06 15:00:03,812 INFO L226 Difference]: Without dead ends: 533 [2021-08-06 15:00:03,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 877.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:00:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-06 15:00:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-08-06 15:00:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-08-06 15:00:03,818 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-08-06 15:00:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:03,818 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-08-06 15:00:03,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-08-06 15:00:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:03,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:03,819 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:03,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:04,027 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 15:00:04,027 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1268319898, now seen corresponding path program 29 times [2021-08-06 15:00:04,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:04,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003800176] [2021-08-06 15:00:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:04,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:04,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:04,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003800176] [2021-08-06 15:00:04,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003800176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:04,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287064409] [2021-08-06 15:00:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:00:04,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:04,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:04,396 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 15:00:04,397 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 15:00:05,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:00:05,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:05,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:06,302 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:00:06,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:00:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:06,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287064409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:06,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:06,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 15:00:06,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382409723] [2021-08-06 15:00:06,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:00:06,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:00:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:00:06,595 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:07,551 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-08-06 15:00:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:00:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:00:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:07,553 INFO L225 Difference]: With dead ends: 618 [2021-08-06 15:00:07,553 INFO L226 Difference]: Without dead ends: 570 [2021-08-06 15:00:07,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 987.9ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:00:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-06 15:00:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-08-06 15:00:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-08-06 15:00:07,560 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-08-06 15:00:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:07,560 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-08-06 15:00:07,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-08-06 15:00:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:07,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:07,561 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:07,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:07,770 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 15:00:07,771 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:07,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1641024808, now seen corresponding path program 30 times [2021-08-06 15:00:07,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:07,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043026749] [2021-08-06 15:00:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:07,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:08,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:08,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043026749] [2021-08-06 15:00:08,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043026749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:08,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239008070] [2021-08-06 15:00:08,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:00:08,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:08,146 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 15:00:08,146 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 15:00:09,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:00:09,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:09,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:10,101 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:10,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:10,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239008070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:10,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:10,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:10,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183254458] [2021-08-06 15:00:10,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:10,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:10,331 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:11,572 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-08-06 15:00:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:00:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:11,574 INFO L225 Difference]: With dead ends: 656 [2021-08-06 15:00:11,574 INFO L226 Difference]: Without dead ends: 608 [2021-08-06 15:00:11,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1027.8ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:00:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-06 15:00:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-08-06 15:00:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-08-06 15:00:11,580 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-08-06 15:00:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:11,580 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-08-06 15:00:11,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-08-06 15:00:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:11,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:11,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:11,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 15:00:11,784 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 15:00:11,785 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:11,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2012831898, now seen corresponding path program 31 times [2021-08-06 15:00:11,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:11,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789943135] [2021-08-06 15:00:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:11,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:12,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:12,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789943135] [2021-08-06 15:00:12,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789943135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:12,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549025244] [2021-08-06 15:00:12,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:00:12,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:12,144 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 15:00:12,145 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 15:00:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:13,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:13,980 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:13,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:14,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549025244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:14,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:14,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:14,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794986841] [2021-08-06 15:00:14,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:14,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:14,294 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:15,573 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-08-06 15:00:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:00:15,574 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:15,576 INFO L225 Difference]: With dead ends: 689 [2021-08-06 15:00:15,576 INFO L226 Difference]: Without dead ends: 657 [2021-08-06 15:00:15,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:00:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-06 15:00:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-08-06 15:00:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-08-06 15:00:15,582 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-08-06 15:00:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:15,582 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-08-06 15:00:15,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-08-06 15:00:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:15,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:15,583 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:15,604 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 15:00:15,796 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 15:00:15,797 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash -855893032, now seen corresponding path program 32 times [2021-08-06 15:00:15,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:15,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948528980] [2021-08-06 15:00:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:15,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:16,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948528980] [2021-08-06 15:00:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948528980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281352091] [2021-08-06 15:00:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:00:16,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:16,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:16,132 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 15:00:16,133 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 15:00:17,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:00:17,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:17,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:17,983 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:17,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:18,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281352091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:18,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:18,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:18,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955691536] [2021-08-06 15:00:18,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:18,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:18,280 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:19,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:19,787 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-08-06 15:00:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:00:19,787 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:19,789 INFO L225 Difference]: With dead ends: 757 [2021-08-06 15:00:19,789 INFO L226 Difference]: Without dead ends: 713 [2021-08-06 15:00:19,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1214.8ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:00:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-08-06 15:00:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-08-06 15:00:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-08-06 15:00:19,795 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-08-06 15:00:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:19,796 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-08-06 15:00:19,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-08-06 15:00:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:19,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:19,797 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:19,819 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 15:00:20,001 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 15:00:20,001 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:20,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1493608744, now seen corresponding path program 33 times [2021-08-06 15:00:20,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:20,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690088427] [2021-08-06 15:00:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:20,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:20,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:20,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690088427] [2021-08-06 15:00:20,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690088427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:20,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500467500] [2021-08-06 15:00:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:00:20,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:20,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:20,355 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 15:00:20,355 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 15:00:21,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:00:21,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:22,203 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:22,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:22,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500467500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:22,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:22,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:22,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741429238] [2021-08-06 15:00:22,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:22,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:22,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:22,535 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:23,385 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-08-06 15:00:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:00:23,385 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:23,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:23,386 INFO L225 Difference]: With dead ends: 579 [2021-08-06 15:00:23,387 INFO L226 Difference]: Without dead ends: 551 [2021-08-06 15:00:23,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:00:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-06 15:00:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-08-06 15:00:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-08-06 15:00:23,392 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-08-06 15:00:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:23,392 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-08-06 15:00:23,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-08-06 15:00:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:23,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:23,393 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:23,424 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 15:00:23,613 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 15:00:23,614 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:23,614 INFO L82 PathProgramCache]: Analyzing trace with hash 983015062, now seen corresponding path program 34 times [2021-08-06 15:00:23,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:23,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818984734] [2021-08-06 15:00:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:23,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:23,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:23,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818984734] [2021-08-06 15:00:23,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818984734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:23,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233355375] [2021-08-06 15:00:23,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:00:23,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:23,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:23,978 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 15:00:23,978 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 15:00:25,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:00:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:26,166 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:26,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:26,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233355375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:26,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:26,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:26,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813345472] [2021-08-06 15:00:26,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:26,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:26,410 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:27,200 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-08-06 15:00:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:00:27,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:27,201 INFO L225 Difference]: With dead ends: 557 [2021-08-06 15:00:27,201 INFO L226 Difference]: Without dead ends: 509 [2021-08-06 15:00:27,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 867.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:00:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-06 15:00:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-08-06 15:00:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-08-06 15:00:27,207 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-08-06 15:00:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:27,207 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-08-06 15:00:27,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-08-06 15:00:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:27,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:27,208 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:27,229 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 15:00:27,409 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 15:00:27,409 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1926329644, now seen corresponding path program 35 times [2021-08-06 15:00:27,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:27,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962066584] [2021-08-06 15:00:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:27,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:27,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:27,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962066584] [2021-08-06 15:00:27,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962066584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:27,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551030584] [2021-08-06 15:00:27,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:00:27,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:27,819 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 15:00:27,819 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 15:00:29,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:00:29,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:29,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:00:29,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:29,967 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:00:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:00:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:30,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551030584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:30,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:30,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:30,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158399541] [2021-08-06 15:00:30,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:30,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:30,183 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:31,135 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-08-06 15:00:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:00:31,135 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:31,137 INFO L225 Difference]: With dead ends: 562 [2021-08-06 15:00:31,137 INFO L226 Difference]: Without dead ends: 518 [2021-08-06 15:00:31,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 957.3ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:00:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-06 15:00:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-08-06 15:00:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-08-06 15:00:31,142 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-08-06 15:00:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-08-06 15:00:31,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-08-06 15:00:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:31,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:31,143 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:31,163 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 15:00:31,343 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 15:00:31,344 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:31,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1727527062, now seen corresponding path program 36 times [2021-08-06 15:00:31,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:31,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108948329] [2021-08-06 15:00:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:31,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:31,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:31,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108948329] [2021-08-06 15:00:31,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108948329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:31,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617721721] [2021-08-06 15:00:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:00:31,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:31,689 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 15:00:31,689 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 15:00:33,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:00:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:00:33,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:33,720 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:00:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:00:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617721721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:33,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:33,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:33,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555675018] [2021-08-06 15:00:33,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:33,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:33,996 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:34,964 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-08-06 15:00:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:00:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:34,966 INFO L225 Difference]: With dead ends: 596 [2021-08-06 15:00:34,966 INFO L226 Difference]: Without dead ends: 564 [2021-08-06 15:00:34,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 973.8ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:00:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-08-06 15:00:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-08-06 15:00:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-08-06 15:00:34,972 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-08-06 15:00:34,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:34,972 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-08-06 15:00:34,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:34,972 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-08-06 15:00:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:34,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:34,972 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:34,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 15:00:35,180 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 15:00:35,181 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1141197868, now seen corresponding path program 37 times [2021-08-06 15:00:35,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:35,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834747556] [2021-08-06 15:00:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:35,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:35,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:35,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834747556] [2021-08-06 15:00:35,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834747556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:35,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352271650] [2021-08-06 15:00:35,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:00:35,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:35,530 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 15:00:35,531 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 15:00:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:37,640 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:37,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:37,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352271650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:37,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:37,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:37,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679213297] [2021-08-06 15:00:37,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:37,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:37,906 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:39,278 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-08-06 15:00:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:00:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:39,280 INFO L225 Difference]: With dead ends: 658 [2021-08-06 15:00:39,280 INFO L226 Difference]: Without dead ends: 610 [2021-08-06 15:00:39,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1251.7ms TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:00:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-08-06 15:00:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-08-06 15:00:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-08-06 15:00:39,287 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-08-06 15:00:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:39,288 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-08-06 15:00:39,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-08-06 15:00:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:39,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:39,289 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:39,312 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 15:00:39,504 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 15:00:39,505 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2055830614, now seen corresponding path program 38 times [2021-08-06 15:00:39,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:39,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129557729] [2021-08-06 15:00:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:39,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:39,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:39,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129557729] [2021-08-06 15:00:39,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129557729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:39,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694068663] [2021-08-06 15:00:39,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:00:39,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:39,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:39,855 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 15:00:39,856 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 15:00:41,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:00:41,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:00:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:41,948 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:42,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694068663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:42,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:42,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:42,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588093407] [2021-08-06 15:00:42,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:42,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:42,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:42,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:42,259 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:43,316 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-08-06 15:00:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:00:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:43,318 INFO L225 Difference]: With dead ends: 556 [2021-08-06 15:00:43,318 INFO L226 Difference]: Without dead ends: 528 [2021-08-06 15:00:43,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1011.8ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:00:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-08-06 15:00:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-08-06 15:00:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-08-06 15:00:43,323 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-08-06 15:00:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:43,323 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-08-06 15:00:43,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-08-06 15:00:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:43,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:43,324 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:43,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 15:00:43,533 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 15:00:43,533 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:43,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:43,534 INFO L82 PathProgramCache]: Analyzing trace with hash -246578804, now seen corresponding path program 39 times [2021-08-06 15:00:43,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:43,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915542285] [2021-08-06 15:00:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:43,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:43,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:43,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915542285] [2021-08-06 15:00:43,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915542285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:43,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964532118] [2021-08-06 15:00:43,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:00:43,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:43,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:43,887 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 15:00:43,888 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 15:00:45,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:00:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:46,302 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:46,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:46,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964532118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:46,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:46,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:46,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678953662] [2021-08-06 15:00:46,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:46,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:46,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:46,536 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:47,513 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-08-06 15:00:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:00:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:47,515 INFO L225 Difference]: With dead ends: 607 [2021-08-06 15:00:47,515 INFO L226 Difference]: Without dead ends: 559 [2021-08-06 15:00:47,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 881.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:00:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-06 15:00:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-08-06 15:00:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-08-06 15:00:47,520 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-08-06 15:00:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:47,520 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-08-06 15:00:47,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-08-06 15:00:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:47,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:47,521 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:47,542 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 15:00:47,736 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 15:00:47,737 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1032792910, now seen corresponding path program 40 times [2021-08-06 15:00:47,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:47,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655987018] [2021-08-06 15:00:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:47,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:48,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:48,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655987018] [2021-08-06 15:00:48,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655987018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:48,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109820625] [2021-08-06 15:00:48,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:00:48,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:48,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:48,097 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 15:00:48,098 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 15:00:49,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:00:49,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:00:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:50,568 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:50,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:00:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:50,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109820625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:50,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:50,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:50,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804030695] [2021-08-06 15:00:50,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:50,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:50,789 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:51,692 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-08-06 15:00:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:00:51,692 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:51,694 INFO L225 Difference]: With dead ends: 644 [2021-08-06 15:00:51,694 INFO L226 Difference]: Without dead ends: 596 [2021-08-06 15:00:51,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 883.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:00:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-06 15:00:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-08-06 15:00:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-08-06 15:00:51,700 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-08-06 15:00:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:51,700 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-08-06 15:00:51,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-08-06 15:00:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:51,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:51,701 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:51,722 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 15:00:51,901 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 15:00:51,901 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1876551796, now seen corresponding path program 41 times [2021-08-06 15:00:51,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:51,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707821198] [2021-08-06 15:00:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:51,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:52,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:52,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707821198] [2021-08-06 15:00:52,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707821198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:52,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188022727] [2021-08-06 15:00:52,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:00:52,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:52,277 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 15:00:52,278 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 15:00:54,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:00:54,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:00:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:54,829 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:00:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:00:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:55,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188022727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:55,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:55,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:55,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992531004] [2021-08-06 15:00:55,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:55,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:55,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:55,043 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:56,229 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-08-06 15:00:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:00:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:00:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:56,231 INFO L225 Difference]: With dead ends: 682 [2021-08-06 15:00:56,231 INFO L226 Difference]: Without dead ends: 634 [2021-08-06 15:00:56,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 996.4ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:00:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-08-06 15:00:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-08-06 15:00:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-08-06 15:00:56,237 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-08-06 15:00:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:56,237 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-08-06 15:00:56,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:00:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-08-06 15:00:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:00:56,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:56,238 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:56,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 15:00:56,438 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 15:00:56,439 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:00:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1777304910, now seen corresponding path program 42 times [2021-08-06 15:00:56,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:56,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466748428] [2021-08-06 15:00:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:56,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:56,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:56,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466748428] [2021-08-06 15:00:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466748428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:56,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604268629] [2021-08-06 15:00:56,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:00:56,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:56,785 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 15:00:56,830 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 15:00:58,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:00:58,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:58,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:00:58,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:59,225 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:00:59,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:00:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:59,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604268629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:59,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:59,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:00:59,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146366389] [2021-08-06 15:00:59,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:00:59,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:00:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:00:59,522 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:00,747 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-08-06 15:01:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:01:00,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:00,749 INFO L225 Difference]: With dead ends: 715 [2021-08-06 15:01:00,749 INFO L226 Difference]: Without dead ends: 683 [2021-08-06 15:01:00,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1015.7ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:01:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-06 15:01:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-08-06 15:01:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-08-06 15:01:00,756 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-08-06 15:01:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:00,756 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-08-06 15:01:00,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-08-06 15:01:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:00,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:00,756 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:00,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 15:01:00,960 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 15:01:00,961 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1091420020, now seen corresponding path program 43 times [2021-08-06 15:01:00,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:00,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489407286] [2021-08-06 15:01:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:00,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:01,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:01,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489407286] [2021-08-06 15:01:01,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489407286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:01,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772649576] [2021-08-06 15:01:01,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:01:01,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:01,314 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 15:01:01,314 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 15:01:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:03,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:03,781 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:03,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:04,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772649576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:04,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:04,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:04,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23462601] [2021-08-06 15:01:04,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:04,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:04,066 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:05,633 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-08-06 15:01:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:01:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:05,635 INFO L225 Difference]: With dead ends: 783 [2021-08-06 15:01:05,635 INFO L226 Difference]: Without dead ends: 739 [2021-08-06 15:01:05,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1214.2ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:01:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-08-06 15:01:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-08-06 15:01:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-08-06 15:01:05,642 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-08-06 15:01:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:05,642 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-08-06 15:01:05,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-08-06 15:01:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:05,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:05,643 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:05,664 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 15:01:05,843 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 15:01:05,843 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:05,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1729135732, now seen corresponding path program 44 times [2021-08-06 15:01:05,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:05,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965343653] [2021-08-06 15:01:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:05,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:06,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:06,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965343653] [2021-08-06 15:01:06,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965343653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:06,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819736587] [2021-08-06 15:01:06,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:01:06,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:06,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:06,212 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 15:01:06,212 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 15:01:08,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:01:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:08,680 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:08,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819736587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:08,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:08,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:08,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395385542] [2021-08-06 15:01:08,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:08,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:08,996 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:09,977 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-08-06 15:01:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:01:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:09,978 INFO L225 Difference]: With dead ends: 605 [2021-08-06 15:01:09,979 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 15:01:09,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 904.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:01:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 15:01:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-08-06 15:01:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-08-06 15:01:09,984 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-08-06 15:01:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:09,984 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-08-06 15:01:09,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-08-06 15:01:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:09,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:09,985 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:10,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 15:01:10,188 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 15:01:10,189 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 747488074, now seen corresponding path program 45 times [2021-08-06 15:01:10,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:10,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509106630] [2021-08-06 15:01:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:10,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:10,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:10,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509106630] [2021-08-06 15:01:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509106630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:10,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348592604] [2021-08-06 15:01:10,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:01:10,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:10,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:10,542 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 15:01:10,542 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 15:01:12,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:01:12,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:13,293 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:13,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:13,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348592604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:13,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:13,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:13,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509722698] [2021-08-06 15:01:13,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:13,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:13,501 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:14,313 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-08-06 15:01:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:01:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:14,318 INFO L225 Difference]: With dead ends: 583 [2021-08-06 15:01:14,318 INFO L226 Difference]: Without dead ends: 535 [2021-08-06 15:01:14,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:01:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-06 15:01:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-08-06 15:01:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-08-06 15:01:14,324 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-08-06 15:01:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:14,324 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-08-06 15:01:14,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-08-06 15:01:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:14,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:14,324 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:14,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 15:01:14,528 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 15:01:14,529 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2133110664, now seen corresponding path program 46 times [2021-08-06 15:01:14,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:14,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441546780] [2021-08-06 15:01:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:14,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:14,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:14,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441546780] [2021-08-06 15:01:14,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441546780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:14,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310433810] [2021-08-06 15:01:14,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:01:14,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:14,880 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 15:01:14,880 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 15:01:17,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:01:17,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:17,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:17,737 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:17,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:17,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310433810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:17,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:17,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:17,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480317535] [2021-08-06 15:01:17,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:17,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:17,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:17,944 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:19,375 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-08-06 15:01:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:01:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:19,376 INFO L225 Difference]: With dead ends: 708 [2021-08-06 15:01:19,376 INFO L226 Difference]: Without dead ends: 613 [2021-08-06 15:01:19,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1286.0ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:01:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-06 15:01:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-08-06 15:01:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-08-06 15:01:19,382 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-08-06 15:01:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:19,382 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-08-06 15:01:19,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-08-06 15:01:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:19,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:19,383 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:19,404 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 15:01:19,583 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 15:01:19,583 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1492000074, now seen corresponding path program 47 times [2021-08-06 15:01:19,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:19,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240221243] [2021-08-06 15:01:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:19,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:19,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:19,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240221243] [2021-08-06 15:01:19,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240221243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:19,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772470057] [2021-08-06 15:01:19,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:01:19,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:19,935 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 15:01:19,936 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 15:01:22,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:01:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:01:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:22,635 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:22,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:22,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772470057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:22,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:22,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 15:01:22,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293956955] [2021-08-06 15:01:22,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:01:22,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:01:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:01:22,960 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:24,655 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-08-06 15:01:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:01:24,655 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:01:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:24,656 INFO L225 Difference]: With dead ends: 736 [2021-08-06 15:01:24,656 INFO L226 Difference]: Without dead ends: 668 [2021-08-06 15:01:24,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1400.4ms TimeCoverageRelationStatistics Valid=441, Invalid=3719, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:01:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-08-06 15:01:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-08-06 15:01:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-08-06 15:01:24,662 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-08-06 15:01:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:24,662 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-08-06 15:01:24,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-08-06 15:01:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:24,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:24,663 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:24,686 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 15:01:24,877 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 15:01:24,877 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1376724856, now seen corresponding path program 48 times [2021-08-06 15:01:24,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:24,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974666796] [2021-08-06 15:01:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:24,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:25,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:25,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974666796] [2021-08-06 15:01:25,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974666796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:25,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711880753] [2021-08-06 15:01:25,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:01:25,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:25,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:25,210 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 15:01:25,211 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 15:01:27,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:01:27,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:01:27,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:27,981 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:01:27,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:01:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:28,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711880753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:28,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:28,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:28,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516545845] [2021-08-06 15:01:28,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:28,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:28,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:28,274 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:30,156 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-08-06 15:01:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:01:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:30,157 INFO L225 Difference]: With dead ends: 829 [2021-08-06 15:01:30,157 INFO L226 Difference]: Without dead ends: 753 [2021-08-06 15:01:30,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1630.7ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:01:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-08-06 15:01:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-08-06 15:01:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-08-06 15:01:30,163 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-08-06 15:01:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:30,163 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-08-06 15:01:30,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-08-06 15:01:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:30,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:30,164 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:30,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 15:01:30,365 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 15:01:30,365 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:30,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2003609694, now seen corresponding path program 49 times [2021-08-06 15:01:30,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:30,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167588642] [2021-08-06 15:01:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:30,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:30,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:30,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167588642] [2021-08-06 15:01:30,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167588642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:30,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873481251] [2021-08-06 15:01:30,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:01:30,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:30,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:30,737 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 15:01:30,738 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 15:01:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:33,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:33,475 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:33,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:33,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873481251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:33,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:33,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:33,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210918101] [2021-08-06 15:01:33,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:33,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:33,789 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:35,145 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-08-06 15:01:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:01:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:35,146 INFO L225 Difference]: With dead ends: 652 [2021-08-06 15:01:35,146 INFO L226 Difference]: Without dead ends: 596 [2021-08-06 15:01:35,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1309.2ms TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:01:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-06 15:01:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-08-06 15:01:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-08-06 15:01:35,152 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-08-06 15:01:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:35,153 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-08-06 15:01:35,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-08-06 15:01:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:35,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:35,153 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:35,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 15:01:35,354 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 15:01:35,354 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash 420173180, now seen corresponding path program 50 times [2021-08-06 15:01:35,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:35,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749414519] [2021-08-06 15:01:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:35,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:35,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:35,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749414519] [2021-08-06 15:01:35,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749414519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:35,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463220414] [2021-08-06 15:01:35,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:01:35,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:35,733 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 15:01:35,780 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 15:01:38,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:01:38,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:38,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:38,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:38,811 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:38,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:39,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463220414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:39,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:39,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:39,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129722088] [2021-08-06 15:01:39,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:39,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:39,027 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:39,833 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-08-06 15:01:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:01:39,834 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:39,835 INFO L225 Difference]: With dead ends: 637 [2021-08-06 15:01:39,835 INFO L226 Difference]: Without dead ends: 589 [2021-08-06 15:01:39,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 881.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:01:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-06 15:01:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-08-06 15:01:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-08-06 15:01:39,840 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-08-06 15:01:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:39,841 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-08-06 15:01:39,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-08-06 15:01:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:39,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:39,841 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:39,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 15:01:40,042 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 15:01:40,042 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:40,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1805795770, now seen corresponding path program 51 times [2021-08-06 15:01:40,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:40,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542445415] [2021-08-06 15:01:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:40,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:40,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:40,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542445415] [2021-08-06 15:01:40,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542445415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:40,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555105122] [2021-08-06 15:01:40,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:01:40,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:40,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:40,367 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 15:01:40,368 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 15:01:42,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:01:42,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:42,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:43,398 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:43,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555105122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:43,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:43,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:43,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380801833] [2021-08-06 15:01:43,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:43,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:43,603 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:45,018 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-08-06 15:01:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:01:45,018 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:45,020 INFO L225 Difference]: With dead ends: 764 [2021-08-06 15:01:45,020 INFO L226 Difference]: Without dead ends: 669 [2021-08-06 15:01:45,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1312.9ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:01:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-08-06 15:01:45,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-08-06 15:01:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-08-06 15:01:45,026 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-08-06 15:01:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:45,026 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-08-06 15:01:45,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-08-06 15:01:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:45,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:45,027 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:45,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 15:01:45,227 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 15:01:45,227 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:45,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1164685180, now seen corresponding path program 52 times [2021-08-06 15:01:45,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:45,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62212416] [2021-08-06 15:01:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:45,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:45,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:45,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62212416] [2021-08-06 15:01:45,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62212416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:45,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205470895] [2021-08-06 15:01:45,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:01:45,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:45,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:45,573 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 15:01:45,573 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 15:01:48,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:01:48,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:48,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:01:48,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:48,545 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:01:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:01:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:48,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205470895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:48,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:48,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:48,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812600515] [2021-08-06 15:01:48,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:48,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:48,819 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:50,640 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-08-06 15:01:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:01:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:50,642 INFO L225 Difference]: With dead ends: 788 [2021-08-06 15:01:50,642 INFO L226 Difference]: Without dead ends: 720 [2021-08-06 15:01:50,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1461.7ms TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:01:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-08-06 15:01:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-08-06 15:01:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-08-06 15:01:50,648 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-08-06 15:01:50,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:50,648 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-08-06 15:01:50,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-08-06 15:01:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:50,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:50,649 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:50,675 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 15:01:50,864 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 15:01:50,865 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1704039750, now seen corresponding path program 53 times [2021-08-06 15:01:50,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:50,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211389446] [2021-08-06 15:01:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:50,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:51,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:51,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211389446] [2021-08-06 15:01:51,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211389446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:51,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642804301] [2021-08-06 15:01:51,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:01:51,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:51,208 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 15:01:51,209 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 15:01:53,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:01:53,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:53,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:01:53,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:54,242 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:01:54,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:01:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:54,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642804301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:54,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:54,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:01:54,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257786879] [2021-08-06 15:01:54,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:01:54,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:01:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:01:54,513 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:57,040 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-08-06 15:01:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 15:01:57,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:01:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:57,042 INFO L225 Difference]: With dead ends: 888 [2021-08-06 15:01:57,042 INFO L226 Difference]: Without dead ends: 812 [2021-08-06 15:01:57,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 1853.9ms TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-08-06 15:01:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-08-06 15:01:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-08-06 15:01:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-08-06 15:01:57,049 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-08-06 15:01:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:57,049 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-08-06 15:01:57,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:01:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-08-06 15:01:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:01:57,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:57,050 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:57,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 15:01:57,250 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 15:01:57,250 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:01:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:57,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1676294800, now seen corresponding path program 54 times [2021-08-06 15:01:57,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:57,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413361176] [2021-08-06 15:01:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:57,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:57,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:57,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413361176] [2021-08-06 15:01:57,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413361176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:57,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809824883] [2021-08-06 15:01:57,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:01:57,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:57,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:57,605 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 15:01:57,605 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 15:02:00,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:02:00,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:00,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:02:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:00,696 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:02:00,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:02:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:01,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809824883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:01,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:01,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:02:01,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733386235] [2021-08-06 15:02:01,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:02:01,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:02:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:02:01,006 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:02,326 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-08-06 15:02:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:02:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:02:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:02,327 INFO L225 Difference]: With dead ends: 715 [2021-08-06 15:02:02,327 INFO L226 Difference]: Without dead ends: 659 [2021-08-06 15:02:02,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1257.1ms TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:02:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-08-06 15:02:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-08-06 15:02:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-08-06 15:02:02,333 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-08-06 15:02:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:02,333 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-08-06 15:02:02,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-08-06 15:02:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:02,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:02,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:02,357 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 15:02:02,534 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 15:02:02,535 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1679711078, now seen corresponding path program 55 times [2021-08-06 15:02:02,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:02,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483074702] [2021-08-06 15:02:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:02,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:02,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:02,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483074702] [2021-08-06 15:02:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483074702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:02,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690682265] [2021-08-06 15:02:02,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:02:02,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:02,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:02,891 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 15:02:02,891 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 15:02:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:05,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:06,111 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:06,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:06,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690682265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:06,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:06,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:02:06,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243304707] [2021-08-06 15:02:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:02:06,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:02:06,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:02:06,326 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:07,959 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-08-06 15:02:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:02:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:02:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:07,961 INFO L225 Difference]: With dead ends: 766 [2021-08-06 15:02:07,961 INFO L226 Difference]: Without dead ends: 678 [2021-08-06 15:02:07,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1504.6ms TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:02:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-06 15:02:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-08-06 15:02:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-08-06 15:02:07,967 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-08-06 15:02:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:07,967 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-08-06 15:02:07,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-08-06 15:02:07,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:07,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:07,968 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:07,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:08,188 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 15:02:08,188 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1038600488, now seen corresponding path program 56 times [2021-08-06 15:02:08,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:08,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666640907] [2021-08-06 15:02:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:08,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:08,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:08,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666640907] [2021-08-06 15:02:08,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666640907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:08,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178195797] [2021-08-06 15:02:08,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:02:08,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:08,515 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 15:02:08,515 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 15:02:11,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:02:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:11,648 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:11,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:11,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178195797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:11,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:11,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:02:11,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749205199] [2021-08-06 15:02:11,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:02:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:02:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:02:11,923 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:13,670 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-08-06 15:02:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:02:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:02:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:13,672 INFO L225 Difference]: With dead ends: 771 [2021-08-06 15:02:13,672 INFO L226 Difference]: Without dead ends: 707 [2021-08-06 15:02:13,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1442.3ms TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:02:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-06 15:02:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-08-06 15:02:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-08-06 15:02:13,678 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-08-06 15:02:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:13,678 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-08-06 15:02:13,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-08-06 15:02:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:13,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:13,679 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:13,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 15:02:13,879 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 15:02:13,879 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1830124442, now seen corresponding path program 57 times [2021-08-06 15:02:13,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:13,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325955810] [2021-08-06 15:02:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:13,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:14,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:14,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325955810] [2021-08-06 15:02:14,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325955810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:14,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097354760] [2021-08-06 15:02:14,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:02:14,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:14,238 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 15:02:14,239 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 15:02:16,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:02:16,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:16,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:17,427 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:17,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:17,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097354760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:17,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:17,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:02:17,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30432319] [2021-08-06 15:02:17,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:02:17,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:02:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:02:17,685 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:19,889 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-08-06 15:02:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:02:19,889 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:02:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:19,890 INFO L225 Difference]: With dead ends: 823 [2021-08-06 15:02:19,890 INFO L226 Difference]: Without dead ends: 767 [2021-08-06 15:02:19,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1681.5ms TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:02:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-08-06 15:02:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-08-06 15:02:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-08-06 15:02:19,896 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-08-06 15:02:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:19,897 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-08-06 15:02:19,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-08-06 15:02:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:19,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:19,897 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:19,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:20,098 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 15:02:20,098 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:20,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1934971060, now seen corresponding path program 58 times [2021-08-06 15:02:20,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:20,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303887472] [2021-08-06 15:02:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:20,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:20,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:20,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303887472] [2021-08-06 15:02:20,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303887472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:20,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045752182] [2021-08-06 15:02:20,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:02:20,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:20,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:20,460 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 15:02:20,461 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 15:02:23,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:02:23,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:23,647 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:23,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:23,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045752182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:23,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:23,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-08-06 15:02:23,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262340996] [2021-08-06 15:02:23,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:02:23,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:02:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:02:23,952 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:25,321 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-08-06 15:02:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:02:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-08-06 15:02:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:25,323 INFO L225 Difference]: With dead ends: 729 [2021-08-06 15:02:25,323 INFO L226 Difference]: Without dead ends: 673 [2021-08-06 15:02:25,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1269.4ms TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:02:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-08-06 15:02:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-08-06 15:02:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-08-06 15:02:25,329 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-08-06 15:02:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:25,329 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-08-06 15:02:25,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 15:02:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-08-06 15:02:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:25,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:25,330 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:25,353 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 15:02:25,536 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 15:02:25,536 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1614609616, now seen corresponding path program 59 times [2021-08-06 15:02:25,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:25,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682565106] [2021-08-06 15:02:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:25,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:25,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:25,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682565106] [2021-08-06 15:02:25,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682565106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:25,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480889916] [2021-08-06 15:02:25,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:02:25,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:25,893 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 15:02:25,893 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 15:02:28,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:02:28,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:28,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:02:28,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:29,397 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:02:29,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:02:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:29,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480889916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:29,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:29,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:02:29,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766137794] [2021-08-06 15:02:29,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:02:29,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:29,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:02:29,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:02:29,616 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:30,437 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-08-06 15:02:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:02:30,437 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:02:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:30,438 INFO L225 Difference]: With dead ends: 722 [2021-08-06 15:02:30,438 INFO L226 Difference]: Without dead ends: 674 [2021-08-06 15:02:30,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:02:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-08-06 15:02:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-08-06 15:02:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-08-06 15:02:30,444 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-08-06 15:02:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:30,444 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-08-06 15:02:30,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-08-06 15:02:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:30,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:30,445 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:30,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 15:02:30,645 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 15:02:30,646 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1400985966, now seen corresponding path program 60 times [2021-08-06 15:02:30,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:30,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949394715] [2021-08-06 15:02:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:30,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:31,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:31,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949394715] [2021-08-06 15:02:31,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949394715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:31,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831103471] [2021-08-06 15:02:31,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:02:31,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:31,012 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 15:02:31,013 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 15:02:33,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:02:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:34,623 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:34,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831103471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:34,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:34,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:02:34,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264157283] [2021-08-06 15:02:34,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:02:34,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:02:34,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:02:34,832 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:35,731 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-08-06 15:02:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:02:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:02:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:35,732 INFO L225 Difference]: With dead ends: 759 [2021-08-06 15:02:35,732 INFO L226 Difference]: Without dead ends: 711 [2021-08-06 15:02:35,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 929.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:02:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-08-06 15:02:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-08-06 15:02:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-08-06 15:02:35,738 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-08-06 15:02:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-08-06 15:02:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-08-06 15:02:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:35,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:35,739 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:35,765 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 15:02:35,939 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 15:02:35,939 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash -15363376, now seen corresponding path program 61 times [2021-08-06 15:02:35,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:35,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230099670] [2021-08-06 15:02:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:35,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:36,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:36,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230099670] [2021-08-06 15:02:36,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230099670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:36,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030073216] [2021-08-06 15:02:36,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:02:36,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:36,298 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 15:02:36,298 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 15:02:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:39,979 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:39,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:40,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030073216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:40,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:40,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:02:40,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600417144] [2021-08-06 15:02:40,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:02:40,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:02:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:02:40,197 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:41,211 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-08-06 15:02:41,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:02:41,211 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:02:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:41,212 INFO L225 Difference]: With dead ends: 797 [2021-08-06 15:02:41,212 INFO L226 Difference]: Without dead ends: 749 [2021-08-06 15:02:41,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 992.0ms TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:02:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-08-06 15:02:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-08-06 15:02:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-08-06 15:02:41,218 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-08-06 15:02:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:41,218 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-08-06 15:02:41,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-08-06 15:02:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:41,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:41,219 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:41,243 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 15:02:41,432 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 15:02:41,433 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash -656473966, now seen corresponding path program 62 times [2021-08-06 15:02:41,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:41,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875651193] [2021-08-06 15:02:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:41,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:41,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:41,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875651193] [2021-08-06 15:02:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875651193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:41,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665430120] [2021-08-06 15:02:41,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:02:41,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:41,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:41,766 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 15:02:41,766 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 15:02:44,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:02:44,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:44,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:44,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:45,294 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:45,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:45,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665430120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:45,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:45,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:02:45,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343835016] [2021-08-06 15:02:45,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:02:45,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:02:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:02:45,579 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:46,641 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-08-06 15:02:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:02:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:02:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:46,642 INFO L225 Difference]: With dead ends: 830 [2021-08-06 15:02:46,643 INFO L226 Difference]: Without dead ends: 798 [2021-08-06 15:02:46,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1018.6ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:02:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-08-06 15:02:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-08-06 15:02:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-08-06 15:02:46,649 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-08-06 15:02:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:46,649 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-08-06 15:02:46,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-08-06 15:02:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:46,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:46,650 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:46,678 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 15:02:46,864 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 15:02:46,865 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:46,865 INFO L82 PathProgramCache]: Analyzing trace with hash 769768400, now seen corresponding path program 63 times [2021-08-06 15:02:46,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:46,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480785277] [2021-08-06 15:02:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:46,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:47,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:47,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480785277] [2021-08-06 15:02:47,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480785277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:47,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431287515] [2021-08-06 15:02:47,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:02:47,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:47,216 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 15:02:47,216 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 15:02:50,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:02:50,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:50,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:50,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:50,806 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:50,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:51,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431287515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:51,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:51,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:02:51,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330279757] [2021-08-06 15:02:51,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:02:51,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:02:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:02:51,082 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:52,578 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-08-06 15:02:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:02:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:02:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:52,580 INFO L225 Difference]: With dead ends: 897 [2021-08-06 15:02:52,580 INFO L226 Difference]: Without dead ends: 853 [2021-08-06 15:02:52,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1239.0ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:02:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-08-06 15:02:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-08-06 15:02:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-08-06 15:02:52,586 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-08-06 15:02:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:52,586 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-08-06 15:02:52,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-08-06 15:02:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:52,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:52,587 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:52,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:52,787 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 15:02:52,788 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash 132052688, now seen corresponding path program 64 times [2021-08-06 15:02:52,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:52,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687033277] [2021-08-06 15:02:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:52,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:53,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:53,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687033277] [2021-08-06 15:02:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687033277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:53,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190123847] [2021-08-06 15:02:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:02:53,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:53,138 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 15:02:53,139 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 15:02:56,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:02:56,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:56,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:56,739 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:02:56,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:02:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:57,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190123847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:57,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:57,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:02:57,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535830716] [2021-08-06 15:02:57,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:02:57,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:57,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:02:57,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:02:57,061 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:57,959 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-08-06 15:02:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:02:57,960 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:02:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:57,961 INFO L225 Difference]: With dead ends: 720 [2021-08-06 15:02:57,961 INFO L226 Difference]: Without dead ends: 692 [2021-08-06 15:02:57,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 941.7ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:02:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-08-06 15:02:57,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-08-06 15:02:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-08-06 15:02:57,966 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-08-06 15:02:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:57,966 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-08-06 15:02:57,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:02:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-08-06 15:02:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:02:57,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:57,967 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:57,991 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 15:02:58,167 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 15:02:58,168 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:02:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1686290802, now seen corresponding path program 65 times [2021-08-06 15:02:58,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:58,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252550023] [2021-08-06 15:02:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:58,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:58,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:58,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252550023] [2021-08-06 15:02:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252550023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:58,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422531618] [2021-08-06 15:02:58,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:02:58,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:58,535 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 15:02:58,535 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 15:03:01,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:03:01,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:03:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:02,402 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:03:02,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:03:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:02,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422531618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:02,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:02,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-06 15:03:02,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884904541] [2021-08-06 15:03:02,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:03:02,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:03:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:03:02,675 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 15:03:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:03,804 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-08-06 15:03:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:03:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 33 [2021-08-06 15:03:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:03,806 INFO L225 Difference]: With dead ends: 760 [2021-08-06 15:03:03,806 INFO L226 Difference]: Without dead ends: 664 [2021-08-06 15:03:03,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1177.3ms TimeCoverageRelationStatistics Valid=302, Invalid=3238, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:03:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-08-06 15:03:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-08-06 15:03:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-08-06 15:03:03,812 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-08-06 15:03:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:03,812 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-08-06 15:03:03,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 15:03:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-08-06 15:03:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:03,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:03,813 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:03,842 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 15:03:04,028 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 15:03:04,029 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash -300668212, now seen corresponding path program 66 times [2021-08-06 15:03:04,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:04,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018929443] [2021-08-06 15:03:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:04,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:04,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:04,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018929443] [2021-08-06 15:03:04,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018929443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:04,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421580433] [2021-08-06 15:03:04,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:03:04,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:04,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:04,400 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 15:03:04,401 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 15:03:07,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:03:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:03:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:08,302 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:03:08,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:03:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:08,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421580433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:08,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:08,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:03:08,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015305112] [2021-08-06 15:03:08,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:03:08,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:03:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:03:08,514 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:09,887 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-08-06 15:03:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:03:09,887 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:03:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:09,888 INFO L225 Difference]: With dead ends: 806 [2021-08-06 15:03:09,889 INFO L226 Difference]: Without dead ends: 711 [2021-08-06 15:03:09,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1338.4ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:03:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-08-06 15:03:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-08-06 15:03:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-08-06 15:03:09,894 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-08-06 15:03:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:09,894 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-08-06 15:03:09,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-08-06 15:03:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:09,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:09,895 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:09,922 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 15:03:10,111 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 15:03:10,111 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash -941778802, now seen corresponding path program 67 times [2021-08-06 15:03:10,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:10,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823500780] [2021-08-06 15:03:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:10,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:10,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:10,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823500780] [2021-08-06 15:03:10,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823500780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:10,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385659150] [2021-08-06 15:03:10,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:03:10,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:10,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:10,474 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 15:03:10,474 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 15:03:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:13,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:03:13,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:14,287 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:03:14,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:03:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:14,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385659150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:14,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:14,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:03:14,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057362815] [2021-08-06 15:03:14,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:03:14,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:03:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:03:14,567 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:16,122 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-08-06 15:03:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:03:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:03:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:16,123 INFO L225 Difference]: With dead ends: 830 [2021-08-06 15:03:16,123 INFO L226 Difference]: Without dead ends: 762 [2021-08-06 15:03:16,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1344.0ms TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:03:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-06 15:03:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-08-06 15:03:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-08-06 15:03:16,129 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-08-06 15:03:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:16,130 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-08-06 15:03:16,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-08-06 15:03:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:16,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:16,130 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:16,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 15:03:16,340 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 15:03:16,340 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 484463564, now seen corresponding path program 68 times [2021-08-06 15:03:16,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:16,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524839647] [2021-08-06 15:03:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:16,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:16,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:16,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524839647] [2021-08-06 15:03:16,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524839647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:16,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586820156] [2021-08-06 15:03:16,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:03:16,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:16,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:16,682 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 15:03:16,683 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 15:03:19,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:03:19,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:19,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:03:19,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:20,535 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:03:20,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:03:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586820156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:20,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:20,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:03:20,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909691305] [2021-08-06 15:03:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:03:20,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:03:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:03:20,804 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:22,729 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-08-06 15:03:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:03:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:03:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:22,730 INFO L225 Difference]: With dead ends: 939 [2021-08-06 15:03:22,730 INFO L226 Difference]: Without dead ends: 863 [2021-08-06 15:03:22,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1644.6ms TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:03:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-08-06 15:03:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-08-06 15:03:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-08-06 15:03:22,736 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-08-06 15:03:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-08-06 15:03:22,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-08-06 15:03:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:22,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:22,737 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:22,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 15:03:22,944 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 15:03:22,944 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash -430169182, now seen corresponding path program 69 times [2021-08-06 15:03:22,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:22,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072608028] [2021-08-06 15:03:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:22,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:23,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:23,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072608028] [2021-08-06 15:03:23,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072608028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:23,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577312331] [2021-08-06 15:03:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:03:23,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:23,280 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 15:03:23,281 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 15:03:26,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:03:26,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:03:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:27,179 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:03:27,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:03:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:27,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577312331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:27,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:27,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-06 15:03:27,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692266347] [2021-08-06 15:03:27,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:03:27,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:03:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:03:27,556 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 15:03:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:28,910 INFO L93 Difference]: Finished difference Result 775 states and 1529 transitions. [2021-08-06 15:03:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:03:28,910 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 33 [2021-08-06 15:03:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:28,911 INFO L225 Difference]: With dead ends: 775 [2021-08-06 15:03:28,911 INFO L226 Difference]: Without dead ends: 705 [2021-08-06 15:03:28,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1327.5ms TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:03:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-08-06 15:03:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 595. [2021-08-06 15:03:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-08-06 15:03:28,917 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-08-06 15:03:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:28,917 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-08-06 15:03:28,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 15:03:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-08-06 15:03:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:28,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:28,918 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:28,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 15:03:29,118 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 15:03:29,118 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:29,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2013605696, now seen corresponding path program 70 times [2021-08-06 15:03:29,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:29,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586220297] [2021-08-06 15:03:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:29,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:29,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:29,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586220297] [2021-08-06 15:03:29,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586220297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:29,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086414809] [2021-08-06 15:03:29,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:03:29,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:29,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:29,486 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 15:03:29,486 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 15:03:32,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:03:32,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:03:32,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:33,619 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:03:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:03:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:33,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086414809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:33,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:33,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:03:33,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133265793] [2021-08-06 15:03:33,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:03:33,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:03:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:03:33,825 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:34,921 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-08-06 15:03:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:03:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:03:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:34,922 INFO L225 Difference]: With dead ends: 781 [2021-08-06 15:03:34,922 INFO L226 Difference]: Without dead ends: 685 [2021-08-06 15:03:34,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1087.3ms TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:03:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-06 15:03:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-08-06 15:03:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-08-06 15:03:34,927 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-08-06 15:03:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:34,928 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-08-06 15:03:34,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-08-06 15:03:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:34,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:34,928 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:34,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 15:03:35,129 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 15:03:35,129 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:35,129 INFO L82 PathProgramCache]: Analyzing trace with hash -627983106, now seen corresponding path program 71 times [2021-08-06 15:03:35,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:35,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443315679] [2021-08-06 15:03:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:35,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:35,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:35,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443315679] [2021-08-06 15:03:35,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443315679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:35,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586065993] [2021-08-06 15:03:35,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:03:35,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:35,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:35,469 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 15:03:35,470 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 15:03:38,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:03:38,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:38,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:03:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:39,653 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:03:39,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:03:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:39,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586065993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:39,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:39,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:03:39,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223724877] [2021-08-06 15:03:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:03:39,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:03:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:03:39,854 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:41,583 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-08-06 15:03:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:03:41,584 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:03:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:41,585 INFO L225 Difference]: With dead ends: 862 [2021-08-06 15:03:41,585 INFO L226 Difference]: Without dead ends: 760 [2021-08-06 15:03:41,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1475.5ms TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:03:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-08-06 15:03:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-08-06 15:03:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-08-06 15:03:41,591 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-08-06 15:03:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:41,592 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-08-06 15:03:41,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-08-06 15:03:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:41,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:41,592 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:41,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 15:03:41,793 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 15:03:41,793 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1269093696, now seen corresponding path program 72 times [2021-08-06 15:03:41,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:41,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806831054] [2021-08-06 15:03:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:41,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:42,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:42,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806831054] [2021-08-06 15:03:42,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806831054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:42,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308734728] [2021-08-06 15:03:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:03:42,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:42,136 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 15:03:42,136 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 15:03:45,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:03:45,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:03:45,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:46,238 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:03:46,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:03:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:46,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308734728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:46,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:46,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:03:46,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883765154] [2021-08-06 15:03:46,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:03:46,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:03:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:03:46,508 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:48,654 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-08-06 15:03:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 15:03:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:03:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:48,655 INFO L225 Difference]: With dead ends: 971 [2021-08-06 15:03:48,655 INFO L226 Difference]: Without dead ends: 884 [2021-08-06 15:03:48,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 1860.5ms TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 15:03:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-08-06 15:03:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-08-06 15:03:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-08-06 15:03:48,662 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-08-06 15:03:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:48,662 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-08-06 15:03:48,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-08-06 15:03:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:48,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:48,663 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:48,688 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 15:03:48,863 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 15:03:48,863 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash 157148670, now seen corresponding path program 73 times [2021-08-06 15:03:48,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:48,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591059401] [2021-08-06 15:03:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:48,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:49,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:49,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591059401] [2021-08-06 15:03:49,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591059401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:49,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373790111] [2021-08-06 15:03:49,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:03:49,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:49,198 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 15:03:49,198 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 15:03:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:52,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:03:52,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:53,348 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:03:53,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:03:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373790111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:53,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:53,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:03:53,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919088801] [2021-08-06 15:03:53,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:03:53,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:03:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:03:53,623 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:56,483 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-08-06 15:03:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 15:03:56,483 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:03:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:56,484 INFO L225 Difference]: With dead ends: 1084 [2021-08-06 15:03:56,484 INFO L226 Difference]: Without dead ends: 1005 [2021-08-06 15:03:56,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2295.4ms TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-08-06 15:03:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-08-06 15:03:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-08-06 15:03:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-08-06 15:03:56,492 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-08-06 15:03:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:56,492 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-08-06 15:03:56,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:03:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-08-06 15:03:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:03:56,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:56,493 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:56,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 15:03:56,693 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 15:03:56,693 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:03:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash -757484076, now seen corresponding path program 74 times [2021-08-06 15:03:56,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:56,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206006544] [2021-08-06 15:03:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:56,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:57,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:57,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206006544] [2021-08-06 15:03:57,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206006544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:57,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857679718] [2021-08-06 15:03:57,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:03:57,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:57,030 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 15:03:57,031 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 15:04:00,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:04:00,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:00,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:04:00,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:01,229 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:01,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:01,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857679718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:01,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:01,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:01,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862403152] [2021-08-06 15:04:01,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:01,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:01,537 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:02,984 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-08-06 15:04:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:04:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:04:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:02,985 INFO L225 Difference]: With dead ends: 858 [2021-08-06 15:04:02,985 INFO L226 Difference]: Without dead ends: 799 [2021-08-06 15:04:02,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1352.7ms TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:04:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-08-06 15:04:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-08-06 15:04:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-08-06 15:04:02,992 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-08-06 15:04:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:02,992 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-08-06 15:04:02,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-08-06 15:04:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:02,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:02,993 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:03,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 15:04:03,193 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 15:04:03,193 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash -754067798, now seen corresponding path program 75 times [2021-08-06 15:04:03,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:03,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460818131] [2021-08-06 15:04:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:03,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:03,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:03,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460818131] [2021-08-06 15:04:03,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460818131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:03,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577805042] [2021-08-06 15:04:03,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:04:03,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:03,540 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 15:04:03,541 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 15:04:07,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:04:07,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:04:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:07,931 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:07,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:08,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577805042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:08,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:08,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:08,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264649487] [2021-08-06 15:04:08,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:08,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:08,153 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:10,333 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-08-06 15:04:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 15:04:10,334 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:04:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:10,335 INFO L225 Difference]: With dead ends: 923 [2021-08-06 15:04:10,335 INFO L226 Difference]: Without dead ends: 835 [2021-08-06 15:04:10,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 1838.8ms TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 15:04:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-08-06 15:04:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-08-06 15:04:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-08-06 15:04:10,341 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-08-06 15:04:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:10,342 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-08-06 15:04:10,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-08-06 15:04:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:10,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:10,343 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:10,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 15:04:10,543 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 15:04:10,543 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1395178388, now seen corresponding path program 76 times [2021-08-06 15:04:10,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:10,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112696829] [2021-08-06 15:04:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:10,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:10,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:10,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112696829] [2021-08-06 15:04:10,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112696829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:10,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867874292] [2021-08-06 15:04:10,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:04:10,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:10,909 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 15:04:10,923 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 15:04:14,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:04:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:04:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:15,202 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:15,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:15,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867874292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:15,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:15,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:15,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679430168] [2021-08-06 15:04:15,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:15,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:15,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:15,477 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:17,796 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-08-06 15:04:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 15:04:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:04:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:17,798 INFO L225 Difference]: With dead ends: 1025 [2021-08-06 15:04:17,798 INFO L226 Difference]: Without dead ends: 945 [2021-08-06 15:04:17,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 1953.4ms TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:04:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-08-06 15:04:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-08-06 15:04:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-08-06 15:04:17,805 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-08-06 15:04:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:17,805 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-08-06 15:04:17,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-08-06 15:04:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:17,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:17,806 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:17,836 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 15:04:18,019 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 15:04:18,019 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 31063978, now seen corresponding path program 77 times [2021-08-06 15:04:18,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:18,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637662516] [2021-08-06 15:04:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:18,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:18,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:18,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637662516] [2021-08-06 15:04:18,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637662516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:18,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916334417] [2021-08-06 15:04:18,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:04:18,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:18,349 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 15:04:18,357 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 15:04:22,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:04:22,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:22,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:04:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:22,713 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:22,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:23,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916334417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:23,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:23,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-06 15:04:23,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562497704] [2021-08-06 15:04:23,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:04:23,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:04:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:04:23,035 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 15:04:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:25,678 INFO L93 Difference]: Finished difference Result 1012 states and 2023 transitions. [2021-08-06 15:04:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 15:04:25,678 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 33 [2021-08-06 15:04:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:25,679 INFO L225 Difference]: With dead ends: 1012 [2021-08-06 15:04:25,679 INFO L226 Difference]: Without dead ends: 942 [2021-08-06 15:04:25,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 2205.8ms TimeCoverageRelationStatistics Valid=752, Invalid=7804, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 15:04:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-08-06 15:04:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 734. [2021-08-06 15:04:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-08-06 15:04:25,687 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-08-06 15:04:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:25,687 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-08-06 15:04:25,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 15:04:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-08-06 15:04:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:25,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:25,688 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:25,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 15:04:25,896 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 15:04:25,897 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash -73782640, now seen corresponding path program 78 times [2021-08-06 15:04:25,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:25,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933661494] [2021-08-06 15:04:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:25,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:26,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:26,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933661494] [2021-08-06 15:04:26,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933661494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:26,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116444197] [2021-08-06 15:04:26,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:04:26,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:26,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:26,253 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 15:04:26,257 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 15:04:30,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:04:30,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:30,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:04:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:30,629 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:04:30,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:04:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:30,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116444197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:30,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:30,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:30,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749131102] [2021-08-06 15:04:30,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:30,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:30,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:30,948 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:32,612 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-08-06 15:04:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:04:32,612 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:04:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:32,613 INFO L225 Difference]: With dead ends: 987 [2021-08-06 15:04:32,614 INFO L226 Difference]: Without dead ends: 931 [2021-08-06 15:04:32,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1395.5ms TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:04:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-08-06 15:04:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-08-06 15:04:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-08-06 15:04:32,621 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-08-06 15:04:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-08-06 15:04:32,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-08-06 15:04:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:32,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:32,623 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:32,650 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 15:04:32,823 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 15:04:32,823 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1284545878, now seen corresponding path program 79 times [2021-08-06 15:04:32,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:32,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553711747] [2021-08-06 15:04:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:32,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:33,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:33,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553711747] [2021-08-06 15:04:33,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553711747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:33,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485551307] [2021-08-06 15:04:33,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:04:33,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:33,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:33,218 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 15:04:33,219 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 15:04:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:37,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:04:37,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:37,851 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:37,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:38,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485551307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:38,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:38,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:38,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99450601] [2021-08-06 15:04:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:38,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:38,058 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:39,133 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-08-06 15:04:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:04:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:04:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:39,134 INFO L225 Difference]: With dead ends: 1026 [2021-08-06 15:04:39,134 INFO L226 Difference]: Without dead ends: 930 [2021-08-06 15:04:39,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1042.6ms TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:04:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-06 15:04:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-08-06 15:04:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-08-06 15:04:39,142 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-08-06 15:04:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:39,142 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-08-06 15:04:39,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-08-06 15:04:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:39,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:39,143 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:39,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 15:04:39,356 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 15:04:39,357 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1624798828, now seen corresponding path program 80 times [2021-08-06 15:04:39,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:39,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840029423] [2021-08-06 15:04:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:39,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:39,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:39,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840029423] [2021-08-06 15:04:39,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840029423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:39,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794671729] [2021-08-06 15:04:39,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:04:39,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:39,736 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 15:04:39,737 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 15:04:43,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:04:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:04:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:44,414 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:44,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794671729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:44,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:44,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966271467] [2021-08-06 15:04:44,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:44,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:44,621 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:45,795 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-08-06 15:04:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:04:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:04:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:45,797 INFO L225 Difference]: With dead ends: 1041 [2021-08-06 15:04:45,797 INFO L226 Difference]: Without dead ends: 953 [2021-08-06 15:04:45,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1087.2ms TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:04:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-08-06 15:04:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-08-06 15:04:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-08-06 15:04:45,805 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-08-06 15:04:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:45,805 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-08-06 15:04:45,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-08-06 15:04:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:45,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:45,806 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:45,836 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 15:04:46,007 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 15:04:46,007 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:46,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2029057878, now seen corresponding path program 81 times [2021-08-06 15:04:46,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:46,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89701498] [2021-08-06 15:04:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:46,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:46,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:46,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89701498] [2021-08-06 15:04:46,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89701498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:46,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607182562] [2021-08-06 15:04:46,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:04:46,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:46,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:46,377 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 15:04:46,379 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 15:04:50,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:04:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:04:50,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:50,974 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:50,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:51,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607182562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:51,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:51,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:51,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910022011] [2021-08-06 15:04:51,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:51,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:51,243 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:52,833 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-08-06 15:04:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:04:52,833 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:04:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:52,835 INFO L225 Difference]: With dead ends: 1128 [2021-08-06 15:04:52,835 INFO L226 Difference]: Without dead ends: 1032 [2021-08-06 15:04:52,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1451.0ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:04:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-08-06 15:04:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-08-06 15:04:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-08-06 15:04:52,843 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-08-06 15:04:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:52,843 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-08-06 15:04:52,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:04:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-08-06 15:04:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:04:52,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:52,844 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:52,871 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 15:04:53,044 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 15:04:53,044 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:04:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:53,045 INFO L82 PathProgramCache]: Analyzing trace with hash -839667052, now seen corresponding path program 82 times [2021-08-06 15:04:53,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:53,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290031853] [2021-08-06 15:04:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:53,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:53,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:53,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290031853] [2021-08-06 15:04:53,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290031853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:53,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363301003] [2021-08-06 15:04:53,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:04:53,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:53,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:53,380 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 15:04:53,381 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 15:04:57,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:04:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:04:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:58,054 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:04:58,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:04:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:58,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363301003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:58,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:58,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:04:58,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731658118] [2021-08-06 15:04:58,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:04:58,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:58,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:04:58,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:04:58,317 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:05:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:00,631 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-08-06 15:05:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 15:05:00,631 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:05:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:00,633 INFO L225 Difference]: With dead ends: 1294 [2021-08-06 15:05:00,633 INFO L226 Difference]: Without dead ends: 1216 [2021-08-06 15:05:00,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1915.4ms TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 15:05:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-08-06 15:05:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-08-06 15:05:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-08-06 15:05:00,642 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-08-06 15:05:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:00,642 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-08-06 15:05:00,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:05:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-08-06 15:05:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:00,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:00,643 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:00,670 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 15:05:00,843 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 15:05:00,843 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1754299798, now seen corresponding path program 83 times [2021-08-06 15:05:00,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:00,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112339144] [2021-08-06 15:05:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:00,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:01,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:01,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112339144] [2021-08-06 15:05:01,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112339144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:01,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393234342] [2021-08-06 15:05:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:05:01,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:01,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:01,183 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 15:05:01,183 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 15:05:05,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:05:05,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:05:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:05,889 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:05:05,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:05:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:06,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393234342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:06,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:06,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-06 15:05:06,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633211996] [2021-08-06 15:05:06,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:05:06,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:05:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:05:06,196 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:05:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:07,999 INFO L93 Difference]: Finished difference Result 1058 states and 2111 transitions. [2021-08-06 15:05:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:05:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-08-06 15:05:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:08,001 INFO L225 Difference]: With dead ends: 1058 [2021-08-06 15:05:08,001 INFO L226 Difference]: Without dead ends: 996 [2021-08-06 15:05:08,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 1490.4ms TimeCoverageRelationStatistics Valid=487, Invalid=4625, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:05:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-08-06 15:05:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 862. [2021-08-06 15:05:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-08-06 15:05:08,010 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-08-06 15:05:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:08,010 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-08-06 15:05:08,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 15:05:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-08-06 15:05:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:08,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:08,011 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:08,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 15:05:08,211 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 15:05:08,212 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:08,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1258121136, now seen corresponding path program 84 times [2021-08-06 15:05:08,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:08,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704718469] [2021-08-06 15:05:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:08,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:08,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:08,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704718469] [2021-08-06 15:05:08,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704718469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:08,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062014192] [2021-08-06 15:05:08,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:05:08,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:08,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:08,550 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 15:05:08,551 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 15:05:12,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:05:12,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:12,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:05:12,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:13,541 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:05:13,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 15:05:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:13,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062014192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:13,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:13,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-06 15:05:13,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625069514] [2021-08-06 15:05:13,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:05:13,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:05:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:05:13,751 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:14,897 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-08-06 15:05:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:05:14,898 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:05:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:14,899 INFO L225 Difference]: With dead ends: 1056 [2021-08-06 15:05:14,899 INFO L226 Difference]: Without dead ends: 968 [2021-08-06 15:05:14,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1091.1ms TimeCoverageRelationStatistics Valid=305, Invalid=2887, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:05:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-08-06 15:05:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-08-06 15:05:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-08-06 15:05:14,907 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-08-06 15:05:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:14,907 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-08-06 15:05:14,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-08-06 15:05:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:14,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:14,908 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:14,940 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 15:05:15,120 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 15:05:15,121 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1899231726, now seen corresponding path program 85 times [2021-08-06 15:05:15,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:15,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812700763] [2021-08-06 15:05:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:15,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:15,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:15,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812700763] [2021-08-06 15:05:15,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812700763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:15,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2162894] [2021-08-06 15:05:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:05:15,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:15,454 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 15:05:15,455 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 15:05:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:19,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:05:19,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:20,312 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:05:20,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:05:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:20,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2162894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:20,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:20,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-08-06 15:05:20,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88324407] [2021-08-06 15:05:20,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:05:20,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:20,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:05:20,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:05:20,584 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 15:05:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:22,065 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-08-06 15:05:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:05:22,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-08-06 15:05:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:22,067 INFO L225 Difference]: With dead ends: 1078 [2021-08-06 15:05:22,067 INFO L226 Difference]: Without dead ends: 1006 [2021-08-06 15:05:22,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1347.6ms TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:05:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-08-06 15:05:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-08-06 15:05:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-08-06 15:05:22,075 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-08-06 15:05:22,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:22,075 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-08-06 15:05:22,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 15:05:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-08-06 15:05:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:22,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:22,077 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:22,104 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 15:05:22,277 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 15:05:22,277 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:22,277 INFO L82 PathProgramCache]: Analyzing trace with hash -472989360, now seen corresponding path program 86 times [2021-08-06 15:05:22,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:22,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471525041] [2021-08-06 15:05:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:22,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:22,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:22,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471525041] [2021-08-06 15:05:22,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471525041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:22,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613295649] [2021-08-06 15:05:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:05:22,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:22,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:22,635 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 15:05:22,635 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 15:05:27,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:05:27,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:05:27,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:27,506 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:05:27,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-08-06 15:05:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:27,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613295649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:27,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:27,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-08-06 15:05:27,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512901534] [2021-08-06 15:05:27,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:05:27,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:27,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:05:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:05:27,768 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 15:05:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:29,490 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-08-06 15:05:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:05:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-08-06 15:05:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:29,492 INFO L225 Difference]: With dead ends: 1116 [2021-08-06 15:05:29,492 INFO L226 Difference]: Without dead ends: 1054 [2021-08-06 15:05:29,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1594.1ms TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:05:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-08-06 15:05:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-08-06 15:05:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-08-06 15:05:29,500 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-08-06 15:05:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:29,500 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-08-06 15:05:29,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 15:05:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-08-06 15:05:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:29,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:29,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:29,530 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 15:05:29,702 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 15:05:29,702 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:29,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1044174664, now seen corresponding path program 87 times [2021-08-06 15:05:29,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:29,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178588324] [2021-08-06 15:05:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:29,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:30,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:30,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178588324] [2021-08-06 15:05:30,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178588324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:30,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750683306] [2021-08-06 15:05:30,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:05:30,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:30,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:30,039 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 15:05:30,040 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 15:05:34,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:05:34,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:05:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:34,993 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:05:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:05:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750683306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:35,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:35,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:05:35,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18130804] [2021-08-06 15:05:35,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:05:35,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:05:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:05:35,212 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:36,006 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-08-06 15:05:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:05:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:05:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:36,008 INFO L225 Difference]: With dead ends: 1029 [2021-08-06 15:05:36,008 INFO L226 Difference]: Without dead ends: 981 [2021-08-06 15:05:36,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:05:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-08-06 15:05:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-08-06 15:05:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-08-06 15:05:36,016 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-08-06 15:05:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:36,016 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-08-06 15:05:36,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-08-06 15:05:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:36,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:36,017 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:36,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 15:05:36,218 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 15:05:36,218 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:36,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1971420918, now seen corresponding path program 88 times [2021-08-06 15:05:36,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:36,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066037001] [2021-08-06 15:05:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:36,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:36,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066037001] [2021-08-06 15:05:36,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066037001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371376207] [2021-08-06 15:05:36,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:05:36,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:36,555 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 15:05:36,556 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 15:05:41,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:05:41,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:05:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:41,539 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:05:41,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:05:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:41,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371376207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:41,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:41,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:05:41,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921877268] [2021-08-06 15:05:41,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:05:41,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:05:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:05:41,745 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:42,707 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-08-06 15:05:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:05:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:05:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:42,709 INFO L225 Difference]: With dead ends: 1066 [2021-08-06 15:05:42,709 INFO L226 Difference]: Without dead ends: 1018 [2021-08-06 15:05:42,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:05:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-08-06 15:05:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-08-06 15:05:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-08-06 15:05:42,717 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-08-06 15:05:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:42,717 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-08-06 15:05:42,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-08-06 15:05:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:42,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:42,718 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:42,747 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 15:05:42,919 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 15:05:42,919 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash -585798328, now seen corresponding path program 89 times [2021-08-06 15:05:42,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:42,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731419059] [2021-08-06 15:05:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:42,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:43,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:43,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731419059] [2021-08-06 15:05:43,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731419059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:43,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974164832] [2021-08-06 15:05:43,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:05:43,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:43,257 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 15:05:43,257 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 15:05:47,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:05:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:47,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:05:47,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:48,437 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:05:48,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:05:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:48,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974164832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:48,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:48,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-06 15:05:48,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889813494] [2021-08-06 15:05:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:05:48,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:05:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:05:48,647 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 15:05:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:49,670 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-08-06 15:05:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:05:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 33 [2021-08-06 15:05:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:49,672 INFO L225 Difference]: With dead ends: 1104 [2021-08-06 15:05:49,672 INFO L226 Difference]: Without dead ends: 1056 [2021-08-06 15:05:49,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=229, Invalid=2423, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:05:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-08-06 15:05:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-08-06 15:05:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-08-06 15:05:49,680 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-08-06 15:05:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:49,680 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-08-06 15:05:49,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 15:05:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-08-06 15:05:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:49,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:49,681 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:49,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 15:05:49,882 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 15:05:49,882 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1226908918, now seen corresponding path program 90 times [2021-08-06 15:05:49,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:49,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991810060] [2021-08-06 15:05:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:49,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:50,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:50,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991810060] [2021-08-06 15:05:50,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991810060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:50,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058647798] [2021-08-06 15:05:50,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:05:50,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:50,224 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 15:05:50,225 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 15:05:54,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:05:54,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:05:54,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:55,249 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:05:55,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:05:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:55,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058647798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:55,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:55,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:05:55,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957248788] [2021-08-06 15:05:55,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:05:55,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:05:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:05:55,532 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:56,625 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-08-06 15:05:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:05:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:05:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:56,627 INFO L225 Difference]: With dead ends: 1137 [2021-08-06 15:05:56,627 INFO L226 Difference]: Without dead ends: 1105 [2021-08-06 15:05:56,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 976.4ms TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:05:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-08-06 15:05:56,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-08-06 15:05:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-08-06 15:05:56,635 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-08-06 15:05:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:56,635 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-08-06 15:05:56,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-08-06 15:05:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:05:56,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:56,637 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:56,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 15:05:56,837 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 15:05:56,837 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:05:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:56,837 INFO L82 PathProgramCache]: Analyzing trace with hash 199333448, now seen corresponding path program 91 times [2021-08-06 15:05:56,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:56,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578124966] [2021-08-06 15:05:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:56,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:57,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:57,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578124966] [2021-08-06 15:05:57,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578124966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:57,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302357506] [2021-08-06 15:05:57,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:05:57,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:57,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:57,172 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 15:05:57,172 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 15:06:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:06:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:02,260 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:06:02,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:06:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:02,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302357506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:02,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:02,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:06:02,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084338700] [2021-08-06 15:06:02,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:06:02,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:06:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:06:02,534 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:03,869 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-08-06 15:06:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:06:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:06:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:03,870 INFO L225 Difference]: With dead ends: 1204 [2021-08-06 15:06:03,870 INFO L226 Difference]: Without dead ends: 1160 [2021-08-06 15:06:03,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1149.8ms TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:06:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-08-06 15:06:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-08-06 15:06:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-08-06 15:06:03,879 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-08-06 15:06:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:03,879 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-08-06 15:06:03,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-08-06 15:06:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:03,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:03,880 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:03,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 15:06:04,080 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 15:06:04,081 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash -438382264, now seen corresponding path program 92 times [2021-08-06 15:06:04,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:04,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310536568] [2021-08-06 15:06:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:04,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:04,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:04,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310536568] [2021-08-06 15:06:04,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310536568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:04,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814742438] [2021-08-06 15:06:04,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:06:04,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:04,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:04,457 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 15:06:04,480 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 15:06:09,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:06:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:06:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:09,556 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:06:09,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:06:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:09,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814742438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:09,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:09,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:06:09,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468608117] [2021-08-06 15:06:09,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:06:09,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:09,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:06:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:06:09,870 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:10,740 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-08-06 15:06:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:06:10,740 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:06:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:10,741 INFO L225 Difference]: With dead ends: 1027 [2021-08-06 15:06:10,741 INFO L226 Difference]: Without dead ends: 999 [2021-08-06 15:06:10,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 929.2ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:06:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-08-06 15:06:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-08-06 15:06:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-08-06 15:06:10,749 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-08-06 15:06:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:10,750 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-08-06 15:06:10,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-08-06 15:06:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:10,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:10,751 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:10,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 15:06:10,951 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 15:06:10,951 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:10,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:10,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2038241542, now seen corresponding path program 93 times [2021-08-06 15:06:10,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:10,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092843048] [2021-08-06 15:06:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:10,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:11,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:11,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092843048] [2021-08-06 15:06:11,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092843048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:11,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399991882] [2021-08-06 15:06:11,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:06:11,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:11,325 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 15:06:11,326 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 15:06:16,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:06:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:06:16,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:16,617 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:06:16,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:06:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:16,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399991882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:16,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:16,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:06:16,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721956277] [2021-08-06 15:06:16,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:06:16,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:06:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:06:16,830 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:17,937 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-08-06 15:06:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:06:17,937 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:06:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:17,938 INFO L225 Difference]: With dead ends: 1070 [2021-08-06 15:06:17,938 INFO L226 Difference]: Without dead ends: 974 [2021-08-06 15:06:17,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1082.1ms TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:06:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-08-06 15:06:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-08-06 15:06:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-08-06 15:06:17,946 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-08-06 15:06:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:17,946 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-08-06 15:06:17,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-08-06 15:06:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:17,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:17,947 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:17,977 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 15:06:18,150 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 15:06:18,150 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:18,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash -871103164, now seen corresponding path program 94 times [2021-08-06 15:06:18,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:18,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178666655] [2021-08-06 15:06:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:18,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:18,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:18,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178666655] [2021-08-06 15:06:18,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178666655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:18,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271922537] [2021-08-06 15:06:18,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:06:18,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:18,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:18,537 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 15:06:18,538 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 15:06:23,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:06:23,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:06:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:23,808 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:06:23,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:06:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:24,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271922537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:24,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:24,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:06:24,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4989081] [2021-08-06 15:06:24,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:06:24,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:06:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:06:24,015 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:25,607 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-08-06 15:06:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:06:25,607 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:06:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:25,609 INFO L225 Difference]: With dead ends: 1128 [2021-08-06 15:06:25,609 INFO L226 Difference]: Without dead ends: 1033 [2021-08-06 15:06:25,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1379.0ms TimeCoverageRelationStatistics Valid=383, Invalid=3907, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:06:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-08-06 15:06:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-08-06 15:06:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-08-06 15:06:25,618 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-08-06 15:06:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:25,618 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-08-06 15:06:25,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-08-06 15:06:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:25,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:25,619 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:25,650 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 15:06:25,820 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 15:06:25,820 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1512213754, now seen corresponding path program 95 times [2021-08-06 15:06:25,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:25,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339034861] [2021-08-06 15:06:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:25,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:26,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:26,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339034861] [2021-08-06 15:06:26,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339034861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:26,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803414533] [2021-08-06 15:06:26,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:06:26,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:26,159 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 15:06:26,160 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 15:06:31,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:06:31,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:31,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:06:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:31,491 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:06:31,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:06:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:31,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803414533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:31,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:31,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-06 15:06:31,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632070112] [2021-08-06 15:06:31,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:06:31,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:06:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:06:31,823 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 15:06:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:33,507 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-08-06 15:06:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:06:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 33 [2021-08-06 15:06:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:33,508 INFO L225 Difference]: With dead ends: 1153 [2021-08-06 15:06:33,508 INFO L226 Difference]: Without dead ends: 1073 [2021-08-06 15:06:33,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 1574.3ms TimeCoverageRelationStatistics Valid=564, Invalid=4838, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:06:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-06 15:06:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-08-06 15:06:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-08-06 15:06:33,517 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-08-06 15:06:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:33,517 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-08-06 15:06:33,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 15:06:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-08-06 15:06:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:33,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:33,518 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:33,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 15:06:33,718 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 15:06:33,719 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash -85971388, now seen corresponding path program 96 times [2021-08-06 15:06:33,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:33,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129680926] [2021-08-06 15:06:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:33,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:34,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:34,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129680926] [2021-08-06 15:06:34,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129680926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:34,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286256213] [2021-08-06 15:06:34,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:06:34,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:34,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:34,061 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 15:06:34,062 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 15:06:38,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:06:38,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:38,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:06:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:39,414 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:06:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:06:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:39,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286256213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:39,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:39,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:06:39,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792623766] [2021-08-06 15:06:39,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:06:39,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:06:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:06:39,677 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:41,573 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-08-06 15:06:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:06:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:06:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:41,575 INFO L225 Difference]: With dead ends: 1223 [2021-08-06 15:06:41,575 INFO L226 Difference]: Without dead ends: 1164 [2021-08-06 15:06:41,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 1593.6ms TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:06:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-08-06 15:06:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-08-06 15:06:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-08-06 15:06:41,584 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-08-06 15:06:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:41,584 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-08-06 15:06:41,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-08-06 15:06:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:41,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:41,585 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:41,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 15:06:41,785 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 15:06:41,785 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:41,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1000604134, now seen corresponding path program 97 times [2021-08-06 15:06:41,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:41,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493410049] [2021-08-06 15:06:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:41,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:42,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:42,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493410049] [2021-08-06 15:06:42,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493410049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:42,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193465915] [2021-08-06 15:06:42,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:06:42,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:42,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:42,153 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 15:06:42,154 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 15:06:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:06:47,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:47,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:06:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:06:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:47,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193465915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:47,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:47,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:06:47,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371145248] [2021-08-06 15:06:47,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:06:47,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:06:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:06:47,804 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:49,344 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-08-06 15:06:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:06:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:06:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:49,346 INFO L225 Difference]: With dead ends: 1093 [2021-08-06 15:06:49,346 INFO L226 Difference]: Without dead ends: 1034 [2021-08-06 15:06:49,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1361.2ms TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:06:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-08-06 15:06:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-08-06 15:06:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-08-06 15:06:49,354 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-08-06 15:06:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:49,354 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-08-06 15:06:49,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-08-06 15:06:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:49,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:49,355 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:49,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 15:06:49,555 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 15:06:49,556 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1710926648, now seen corresponding path program 98 times [2021-08-06 15:06:49,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:49,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876831040] [2021-08-06 15:06:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:49,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:49,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:49,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876831040] [2021-08-06 15:06:49,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876831040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:49,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232848938] [2021-08-06 15:06:49,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:06:49,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:49,888 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 15:06:49,889 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 15:06:54,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:06:54,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:54,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:06:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:55,427 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:06:55,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:06:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:55,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232848938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:55,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:55,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:06:55,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838502377] [2021-08-06 15:06:55,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:06:55,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:06:55,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:06:55,644 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:56,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:56,823 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-08-06 15:06:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:06:56,824 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:06:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:56,825 INFO L225 Difference]: With dead ends: 1156 [2021-08-06 15:06:56,825 INFO L226 Difference]: Without dead ends: 1060 [2021-08-06 15:06:56,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1033.4ms TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:06:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-08-06 15:06:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-08-06 15:06:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-08-06 15:06:56,834 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-08-06 15:06:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:56,834 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-08-06 15:06:56,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-08-06 15:06:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:06:56,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:56,835 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:56,865 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 15:06:57,035 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 15:06:57,035 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:06:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1198418058, now seen corresponding path program 99 times [2021-08-06 15:06:57,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:57,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582642099] [2021-08-06 15:06:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:57,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:57,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:57,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582642099] [2021-08-06 15:06:57,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582642099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:57,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255738435] [2021-08-06 15:06:57,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:06:57,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:57,368 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 15:06:57,368 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 15:07:02,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:07:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:02,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:07:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:02,944 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:07:02,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:07:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255738435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:03,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:03,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:07:03,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327629821] [2021-08-06 15:07:03,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:07:03,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:03,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:07:03,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:07:03,149 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:04,912 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-08-06 15:07:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:07:04,913 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:07:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:04,914 INFO L225 Difference]: With dead ends: 1272 [2021-08-06 15:07:04,914 INFO L226 Difference]: Without dead ends: 1170 [2021-08-06 15:07:04,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1460.5ms TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:07:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-08-06 15:07:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-08-06 15:07:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-08-06 15:07:04,923 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-08-06 15:07:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:04,923 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-08-06 15:07:04,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-08-06 15:07:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:07:04,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:04,924 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:04,954 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 15:07:05,124 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 15:07:05,125 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1839528648, now seen corresponding path program 100 times [2021-08-06 15:07:05,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:05,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781368457] [2021-08-06 15:07:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:05,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:05,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:05,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781368457] [2021-08-06 15:07:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781368457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:05,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890716037] [2021-08-06 15:07:05,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:07:05,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:05,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:05,454 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 15:07:05,454 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 15:07:10,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:07:10,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:07:10,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:10,991 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:07:10,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:07:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:11,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890716037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:11,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:11,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:07:11,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288126915] [2021-08-06 15:07:11,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:07:11,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:07:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:07:11,263 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:13,627 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-08-06 15:07:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 15:07:13,628 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:07:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:13,629 INFO L225 Difference]: With dead ends: 1420 [2021-08-06 15:07:13,629 INFO L226 Difference]: Without dead ends: 1321 [2021-08-06 15:07:13,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1976.9ms TimeCoverageRelationStatistics Valid=758, Invalid=7074, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 15:07:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-08-06 15:07:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-08-06 15:07:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-08-06 15:07:13,639 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-08-06 15:07:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:13,639 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-08-06 15:07:13,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-08-06 15:07:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:07:13,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:13,640 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:13,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:13,841 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 15:07:13,841 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash -413286282, now seen corresponding path program 101 times [2021-08-06 15:07:13,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:13,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388431496] [2021-08-06 15:07:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:13,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:14,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:14,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388431496] [2021-08-06 15:07:14,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388431496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:14,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281765180] [2021-08-06 15:07:14,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:07:14,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:14,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:14,203 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 15:07:14,203 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 15:07:19,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:07:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:07:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:19,774 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:07:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:07:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:20,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281765180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:20,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:20,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:07:20,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053991965] [2021-08-06 15:07:20,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:07:20,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:20,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:07:20,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:07:20,039 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:22,733 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-08-06 15:07:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 15:07:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:07:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:22,735 INFO L225 Difference]: With dead ends: 1535 [2021-08-06 15:07:22,735 INFO L226 Difference]: Without dead ends: 1473 [2021-08-06 15:07:22,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 2112.9ms TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 15:07:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-08-06 15:07:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-08-06 15:07:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-08-06 15:07:22,746 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-08-06 15:07:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:22,746 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-08-06 15:07:22,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-08-06 15:07:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:07:22,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:22,747 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:22,778 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 15:07:22,948 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 15:07:22,949 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1327919028, now seen corresponding path program 102 times [2021-08-06 15:07:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693054207] [2021-08-06 15:07:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:22,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:23,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:23,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693054207] [2021-08-06 15:07:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693054207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:23,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931728754] [2021-08-06 15:07:23,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:07:23,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:23,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:23,279 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 15:07:23,279 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 15:07:28,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:07:28,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:07:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:28,832 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:07:28,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:07:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:29,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931728754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:29,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:29,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:07:29,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417689935] [2021-08-06 15:07:29,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:07:29,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:29,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:07:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:07:29,136 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:30,749 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-08-06 15:07:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:07:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:07:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:30,751 INFO L225 Difference]: With dead ends: 1427 [2021-08-06 15:07:30,751 INFO L226 Difference]: Without dead ends: 1371 [2021-08-06 15:07:30,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1354.5ms TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:07:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-08-06 15:07:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-08-06 15:07:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-08-06 15:07:30,762 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-08-06 15:07:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:30,762 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-08-06 15:07:30,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-08-06 15:07:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:07:30,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:30,763 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:30,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 15:07:30,963 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 15:07:30,964 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1324502750, now seen corresponding path program 103 times [2021-08-06 15:07:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:30,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684375218] [2021-08-06 15:07:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:30,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:31,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:31,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684375218] [2021-08-06 15:07:31,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684375218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:31,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779783039] [2021-08-06 15:07:31,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:07:31,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:31,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:31,292 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 15:07:31,293 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 15:07:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:36,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:07:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:37,067 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:07:37,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:07:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779783039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:37,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:37,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:07:37,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496042434] [2021-08-06 15:07:37,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:07:37,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:07:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:07:37,274 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:39,347 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-08-06 15:07:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 15:07:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:07:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:39,349 INFO L225 Difference]: With dead ends: 1723 [2021-08-06 15:07:39,349 INFO L226 Difference]: Without dead ends: 1635 [2021-08-06 15:07:39,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 1708.3ms TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 15:07:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-06 15:07:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-08-06 15:07:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-08-06 15:07:39,363 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-08-06 15:07:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:39,363 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-08-06 15:07:39,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-08-06 15:07:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:07:39,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:39,364 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:39,395 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 15:07:39,564 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 15:07:39,565 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1965613340, now seen corresponding path program 104 times [2021-08-06 15:07:39,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:39,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811926957] [2021-08-06 15:07:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:39,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:39,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:39,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811926957] [2021-08-06 15:07:39,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811926957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:39,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675842002] [2021-08-06 15:07:39,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:07:39,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:39,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:39,917 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 15:07:39,917 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 15:07:45,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:07:45,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:07:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:45,654 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:07:45,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:07:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:45,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675842002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:45,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:45,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:07:45,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803270278] [2021-08-06 15:07:45,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:07:45,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:07:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:07:45,928 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:48,160 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-08-06 15:07:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 15:07:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:07:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:48,163 INFO L225 Difference]: With dead ends: 1938 [2021-08-06 15:07:48,163 INFO L226 Difference]: Without dead ends: 1858 [2021-08-06 15:07:48,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1884.4ms TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 15:07:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-08-06 15:07:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-08-06 15:07:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-08-06 15:07:48,177 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-08-06 15:07:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:48,177 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-08-06 15:07:48,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-08-06 15:07:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:07:48,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:48,178 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:48,210 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 15:07:48,378 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 15:07:48,378 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:48,379 INFO L82 PathProgramCache]: Analyzing trace with hash -539370974, now seen corresponding path program 105 times [2021-08-06 15:07:48,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:48,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572650318] [2021-08-06 15:07:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:48,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:48,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:48,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572650318] [2021-08-06 15:07:48,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572650318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:48,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856949790] [2021-08-06 15:07:48,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:07:48,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:48,718 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 15:07:48,719 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 15:07:54,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:07:54,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:54,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:07:54,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:54,507 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:07:54,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:07:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:54,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856949790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:54,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:54,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:07:54,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860822163] [2021-08-06 15:07:54,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:07:54,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:07:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:07:54,769 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:57,093 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-08-06 15:07:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 15:07:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:07:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:57,096 INFO L225 Difference]: With dead ends: 1677 [2021-08-06 15:07:57,096 INFO L226 Difference]: Without dead ends: 1621 [2021-08-06 15:07:57,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 2034.1ms TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 15:07:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-08-06 15:07:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-08-06 15:07:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-08-06 15:07:57,109 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-08-06 15:07:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:57,109 INFO L470 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-08-06 15:07:57,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-08-06 15:07:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:07:57,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:57,110 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:57,142 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 15:07:57,310 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 15:07:57,311 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:07:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash -644217592, now seen corresponding path program 106 times [2021-08-06 15:07:57,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:57,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875942741] [2021-08-06 15:07:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:57,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:57,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:57,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875942741] [2021-08-06 15:07:57,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875942741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:57,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697655128] [2021-08-06 15:07:57,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:07:57,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:57,682 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 15:07:57,683 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 15:08:03,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:08:03,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:08:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:03,423 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:08:03,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:08:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:03,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697655128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:03,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:03,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:08:03,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395609158] [2021-08-06 15:08:03,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:08:03,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:08:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:08:03,725 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:05,189 INFO L93 Difference]: Finished difference Result 1761 states and 3540 transitions. [2021-08-06 15:08:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:08:05,190 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:08:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:05,192 INFO L225 Difference]: With dead ends: 1761 [2021-08-06 15:08:05,192 INFO L226 Difference]: Without dead ends: 1705 [2021-08-06 15:08:05,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1348.3ms TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:08:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-08-06 15:08:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-08-06 15:08:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-08-06 15:08:05,205 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-08-06 15:08:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:05,205 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-08-06 15:08:05,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:05,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-08-06 15:08:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:08:05,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:05,206 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:05,236 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 15:08:05,406 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 15:08:05,406 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash 714110926, now seen corresponding path program 107 times [2021-08-06 15:08:05,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:05,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653343062] [2021-08-06 15:08:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:05,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:05,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:05,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653343062] [2021-08-06 15:08:05,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653343062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:05,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764865734] [2021-08-06 15:08:05,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:08:05,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:05,778 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 15:08:05,778 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 15:08:11,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:08:11,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:11,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:08:11,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:11,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:08:11,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:08:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:11,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764865734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:11,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:11,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:08:11,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68492594] [2021-08-06 15:08:11,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:08:11,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:08:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:08:11,925 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:13,006 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-08-06 15:08:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:08:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:08:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:13,008 INFO L225 Difference]: With dead ends: 1677 [2021-08-06 15:08:13,008 INFO L226 Difference]: Without dead ends: 1581 [2021-08-06 15:08:13,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 990.4ms TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:08:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-08-06 15:08:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-08-06 15:08:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-08-06 15:08:13,020 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-08-06 15:08:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:13,020 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-08-06 15:08:13,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-08-06 15:08:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:08:13,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:13,022 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:13,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 15:08:13,222 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 15:08:13,222 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2099733516, now seen corresponding path program 108 times [2021-08-06 15:08:13,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:13,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873679787] [2021-08-06 15:08:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:13,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:13,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:13,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873679787] [2021-08-06 15:08:13,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873679787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:13,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146147796] [2021-08-06 15:08:13,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:08:13,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:13,559 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 15:08:13,559 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 15:08:19,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:08:19,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:08:19,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:19,593 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:08:19,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:08:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:19,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146147796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:19,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:19,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:08:19,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163085024] [2021-08-06 15:08:19,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:08:19,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:08:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:08:19,792 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:20,815 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-08-06 15:08:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:08:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:08:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:20,818 INFO L225 Difference]: With dead ends: 1692 [2021-08-06 15:08:20,818 INFO L226 Difference]: Without dead ends: 1604 [2021-08-06 15:08:20,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 998.8ms TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:08:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-08-06 15:08:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-08-06 15:08:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-08-06 15:08:20,831 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-08-06 15:08:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:20,831 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-08-06 15:08:20,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-08-06 15:08:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:08:20,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:20,832 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:20,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 15:08:21,033 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 15:08:21,033 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:21,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:21,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1458622926, now seen corresponding path program 109 times [2021-08-06 15:08:21,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:21,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502443996] [2021-08-06 15:08:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:21,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:21,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:21,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502443996] [2021-08-06 15:08:21,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502443996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:21,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256772402] [2021-08-06 15:08:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:08:21,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:21,430 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 15:08:21,430 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 15:08:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:08:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:27,348 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:08:27,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:08:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256772402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:27,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:27,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:08:27,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924791237] [2021-08-06 15:08:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:08:27,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:08:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:08:27,619 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:29,189 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-08-06 15:08:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:08:29,189 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:08:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:29,191 INFO L225 Difference]: With dead ends: 1779 [2021-08-06 15:08:29,191 INFO L226 Difference]: Without dead ends: 1683 [2021-08-06 15:08:29,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1373.8ms TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:08:29,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-08-06 15:08:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-08-06 15:08:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-08-06 15:08:29,204 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-08-06 15:08:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:29,204 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-08-06 15:08:29,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-08-06 15:08:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:08:29,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:29,206 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:29,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 15:08:29,406 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 15:08:29,406 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1410102004, now seen corresponding path program 110 times [2021-08-06 15:08:29,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:29,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472473542] [2021-08-06 15:08:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:29,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:29,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:29,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472473542] [2021-08-06 15:08:29,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472473542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:29,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923629051] [2021-08-06 15:08:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:08:29,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:29,747 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 15:08:29,747 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 15:08:35,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:08:35,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:35,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:08:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:35,748 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:08:35,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:08:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:36,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923629051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:36,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:36,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:08:36,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254518627] [2021-08-06 15:08:36,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:08:36,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:08:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:08:36,005 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:38,070 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-08-06 15:08:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 15:08:38,070 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:08:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:38,073 INFO L225 Difference]: With dead ends: 1945 [2021-08-06 15:08:38,073 INFO L226 Difference]: Without dead ends: 1867 [2021-08-06 15:08:38,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1776.2ms TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:08:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-08-06 15:08:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-08-06 15:08:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-08-06 15:08:38,091 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-08-06 15:08:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:38,091 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-08-06 15:08:38,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-08-06 15:08:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:08:38,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:38,092 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:38,124 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 15:08:38,293 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 15:08:38,293 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1970232546, now seen corresponding path program 111 times [2021-08-06 15:08:38,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:38,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776817353] [2021-08-06 15:08:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:38,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:38,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776817353] [2021-08-06 15:08:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776817353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546517970] [2021-08-06 15:08:38,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:08:38,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:38,628 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 15:08:38,628 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 15:08:44,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:08:44,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:08:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:44,678 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:08:44,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:08:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:45,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546517970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:45,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:45,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-06 15:08:45,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493046662] [2021-08-06 15:08:45,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:08:45,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:08:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:08:45,042 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 15:08:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:46,693 INFO L93 Difference]: Finished difference Result 1724 states and 3446 transitions. [2021-08-06 15:08:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:08:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 33 [2021-08-06 15:08:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:46,696 INFO L225 Difference]: With dead ends: 1724 [2021-08-06 15:08:46,696 INFO L226 Difference]: Without dead ends: 1646 [2021-08-06 15:08:46,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 1476.0ms TimeCoverageRelationStatistics Valid=556, Invalid=5144, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 15:08:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-08-06 15:08:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1473. [2021-08-06 15:08:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-08-06 15:08:46,708 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-08-06 15:08:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:46,708 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-08-06 15:08:46,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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 15:08:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-08-06 15:08:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:08:46,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:46,710 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:46,742 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 15:08:46,910 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 15:08:46,910 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1828556088, now seen corresponding path program 112 times [2021-08-06 15:08:46,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:46,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882023588] [2021-08-06 15:08:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:46,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:47,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:47,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882023588] [2021-08-06 15:08:47,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882023588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:47,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031609168] [2021-08-06 15:08:47,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:08:47,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:47,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:47,250 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 15:08:47,250 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 15:08:52,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:08:52,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:08:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:53,431 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:08:53,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:08:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:53,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031609168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:53,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:53,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-08-06 15:08:53,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799099576] [2021-08-06 15:08:53,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:08:53,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:08:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:08:53,632 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 15:08:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:55,008 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-08-06 15:08:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:08:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 33 [2021-08-06 15:08:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:55,010 INFO L225 Difference]: With dead ends: 1663 [2021-08-06 15:08:55,010 INFO L226 Difference]: Without dead ends: 1575 [2021-08-06 15:08:55,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1179.8ms TimeCoverageRelationStatistics Valid=336, Invalid=3204, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:08:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-08-06 15:08:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-08-06 15:08:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-08-06 15:08:55,023 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-08-06 15:08:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-08-06 15:08:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 15:08:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-08-06 15:08:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:08:55,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:55,024 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:55,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 15:08:55,236 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 15:08:55,237 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:08:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:55,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1825300618, now seen corresponding path program 113 times [2021-08-06 15:08:55,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:55,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204766874] [2021-08-06 15:08:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:55,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:55,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:55,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204766874] [2021-08-06 15:08:55,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204766874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:55,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144430030] [2021-08-06 15:08:55,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:08:55,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:55,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:55,563 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 15:08:55,563 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 15:09:01,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:09:01,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:09:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:01,705 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:09:01,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:09:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:02,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144430030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:02,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:02,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-08-06 15:09:02,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45288205] [2021-08-06 15:09:02,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:09:02,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:09:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:09:02,016 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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 15:09:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:03,417 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-08-06 15:09:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:09:03,418 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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 33 [2021-08-06 15:09:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:03,419 INFO L225 Difference]: With dead ends: 1683 [2021-08-06 15:09:03,419 INFO L226 Difference]: Without dead ends: 1611 [2021-08-06 15:09:03,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 1321.2ms TimeCoverageRelationStatistics Valid=457, Invalid=4235, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 15:09:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-08-06 15:09:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-08-06 15:09:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-08-06 15:09:03,432 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-08-06 15:09:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:03,432 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-08-06 15:09:03,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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 15:09:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-08-06 15:09:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:09:03,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:03,433 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:03,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 15:09:03,633 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 15:09:03,634 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:03,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:03,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1043424312, now seen corresponding path program 114 times [2021-08-06 15:09:03,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:03,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298283504] [2021-08-06 15:09:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:03,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:03,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:03,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298283504] [2021-08-06 15:09:03,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298283504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:03,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45777011] [2021-08-06 15:09:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:09:03,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:03,959 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 15:09:03,959 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 15:09:09,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:09:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:09:09,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:10,176 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:09:10,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-06 15:09:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:10,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45777011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:10,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:10,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-08-06 15:09:10,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136806689] [2021-08-06 15:09:10,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:09:10,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:09:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:09:10,430 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 15:09:12,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:12,132 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-08-06 15:09:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:09:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 33 [2021-08-06 15:09:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:12,134 INFO L225 Difference]: With dead ends: 1719 [2021-08-06 15:09:12,134 INFO L226 Difference]: Without dead ends: 1657 [2021-08-06 15:09:12,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1519.9ms TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:09:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-08-06 15:09:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-08-06 15:09:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-08-06 15:09:12,147 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-08-06 15:09:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:12,148 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-08-06 15:09:12,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 15:09:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-08-06 15:09:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:09:12,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:12,149 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:12,182 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 15:09:12,360 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 15:09:12,361 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:12,361 INFO L82 PathProgramCache]: Analyzing trace with hash 774026312, now seen corresponding path program 115 times [2021-08-06 15:09:12,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:12,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034098697] [2021-08-06 15:09:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:12,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:12,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:12,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034098697] [2021-08-06 15:09:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034098697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:12,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452338907] [2021-08-06 15:09:12,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:09:12,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:12,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:12,701 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 15:09:12,702 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 15:09:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:18,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:09:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:19,082 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:09:19,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-08-06 15:09:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:19,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452338907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:19,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:19,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:09:19,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727977072] [2021-08-06 15:09:19,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:09:19,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:19,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:09:19,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:09:19,344 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:20,252 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-08-06 15:09:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:09:20,253 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:09:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:20,254 INFO L225 Difference]: With dead ends: 1608 [2021-08-06 15:09:20,254 INFO L226 Difference]: Without dead ends: 1560 [2021-08-06 15:09:20,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 883.2ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:09:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-08-06 15:09:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-08-06 15:09:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-08-06 15:09:20,267 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-08-06 15:09:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:20,267 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-08-06 15:09:20,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-08-06 15:09:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:09:20,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:20,268 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:20,300 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 15:09:20,469 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 15:09:20,469 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2053398026, now seen corresponding path program 116 times [2021-08-06 15:09:20,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:20,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681579581] [2021-08-06 15:09:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:20,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:20,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:20,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681579581] [2021-08-06 15:09:20,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681579581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:20,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095908530] [2021-08-06 15:09:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:09:20,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:20,815 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 15:09:20,816 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 15:09:26,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:09:26,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:09:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:27,363 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:09:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-08-06 15:09:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:27,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095908530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:27,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:27,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:09:27,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915550039] [2021-08-06 15:09:27,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:09:27,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:27,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:09:27,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:09:27,626 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:28,656 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-08-06 15:09:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:09:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:09:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:28,658 INFO L225 Difference]: With dead ends: 1645 [2021-08-06 15:09:28,658 INFO L226 Difference]: Without dead ends: 1597 [2021-08-06 15:09:28,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 906.9ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:09:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-08-06 15:09:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-08-06 15:09:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-08-06 15:09:28,672 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-08-06 15:09:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:28,672 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-08-06 15:09:28,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-08-06 15:09:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:09:28,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:28,673 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:28,706 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 15:09:28,873 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 15:09:28,874 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:28,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:28,874 INFO L82 PathProgramCache]: Analyzing trace with hash -855946680, now seen corresponding path program 117 times [2021-08-06 15:09:28,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:28,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933375425] [2021-08-06 15:09:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:28,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:29,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:29,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933375425] [2021-08-06 15:09:29,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933375425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:29,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143832355] [2021-08-06 15:09:29,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:09:29,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:29,223 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 15:09:29,223 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 15:09:35,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:09:35,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:35,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:09:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:35,821 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:09:35,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-06 15:09:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:36,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143832355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:36,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:36,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:09:36,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029050807] [2021-08-06 15:09:36,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:09:36,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:09:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:09:36,085 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:37,219 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-08-06 15:09:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:09:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:09:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:37,221 INFO L225 Difference]: With dead ends: 1683 [2021-08-06 15:09:37,221 INFO L226 Difference]: Without dead ends: 1635 [2021-08-06 15:09:37,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 999.6ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:09:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-06 15:09:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-08-06 15:09:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-08-06 15:09:37,234 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-08-06 15:09:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-08-06 15:09:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-08-06 15:09:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:09:37,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:37,235 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:37,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 15:09:37,436 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 15:09:37,436 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1497057270, now seen corresponding path program 118 times [2021-08-06 15:09:37,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:37,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991608931] [2021-08-06 15:09:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:37,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:37,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:37,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991608931] [2021-08-06 15:09:37,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991608931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:37,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662779702] [2021-08-06 15:09:37,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:09:37,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:37,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:37,778 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 15:09:37,779 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 15:09:43,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:09:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:09:43,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:44,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:09:44,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-06 15:09:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662779702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:44,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:09:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429889334] [2021-08-06 15:09:44,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:09:44,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:09:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:09:44,682 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:46,024 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-08-06 15:09:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:09:46,025 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:09:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:46,027 INFO L225 Difference]: With dead ends: 1716 [2021-08-06 15:09:46,027 INFO L226 Difference]: Without dead ends: 1684 [2021-08-06 15:09:46,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1051.7ms TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:09:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-08-06 15:09:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-08-06 15:09:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-08-06 15:09:46,040 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-08-06 15:09:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:46,040 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-08-06 15:09:46,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:09:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-08-06 15:09:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:09:46,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:46,041 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:46,075 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 15:09:46,241 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 15:09:46,242 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash -70814904, now seen corresponding path program 119 times [2021-08-06 15:09:46,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:46,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826151489] [2021-08-06 15:09:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:46,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:46,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:46,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826151489] [2021-08-06 15:09:46,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826151489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:46,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742933267] [2021-08-06 15:09:46,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:09:46,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:46,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:46,628 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 15:09:46,629 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 15:09:52,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:09:52,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:52,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 15:09:52,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:53,295 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:09:53,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 29 [2021-08-06 15:09:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:53,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742933267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:53,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:53,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-06 15:09:53,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329481864] [2021-08-06 15:09:53,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:09:53,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:09:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:09:53,715 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 15:09:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:56,513 INFO L93 Difference]: Finished difference Result 1856 states and 3714 transitions. [2021-08-06 15:09:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 15:09:56,513 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 33 [2021-08-06 15:09:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:56,515 INFO L225 Difference]: With dead ends: 1856 [2021-08-06 15:09:56,515 INFO L226 Difference]: Without dead ends: 1792 [2021-08-06 15:09:56,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 2294.6ms TimeCoverageRelationStatistics Valid=564, Invalid=6242, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 15:09:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-08-06 15:09:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1496. [2021-08-06 15:09:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-08-06 15:09:56,529 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-08-06 15:09:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:56,529 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-08-06 15:09:56,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 15:09:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-08-06 15:09:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:09:56,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:56,531 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:56,566 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 15:09:56,744 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 15:09:56,744 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:09:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:56,744 INFO L82 PathProgramCache]: Analyzing trace with hash -708530616, now seen corresponding path program 120 times [2021-08-06 15:09:56,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:56,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198889615] [2021-08-06 15:09:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:56,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:57,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:57,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198889615] [2021-08-06 15:09:57,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198889615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:57,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717923596] [2021-08-06 15:09:57,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:09:57,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:57,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:57,078 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 15:09:57,078 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 15:10:03,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:10:03,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:03,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:10:03,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:03,633 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:10:03,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-06 15:10:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:04,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717923596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:04,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:04,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:10:04,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207348324] [2021-08-06 15:10:04,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:10:04,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:10:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:10:04,016 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:05,066 INFO L93 Difference]: Finished difference Result 1617 states and 3257 transitions. [2021-08-06 15:10:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:10:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:10:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:05,068 INFO L225 Difference]: With dead ends: 1617 [2021-08-06 15:10:05,068 INFO L226 Difference]: Without dead ends: 1589 [2021-08-06 15:10:05,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 906.0ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:10:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-08-06 15:10:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1488. [2021-08-06 15:10:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.0248823133826495) internal successors, (3011), 1487 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3011 transitions. [2021-08-06 15:10:05,081 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3011 transitions. Word has length 33 [2021-08-06 15:10:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:05,081 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 3011 transitions. [2021-08-06 15:10:05,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3011 transitions. [2021-08-06 15:10:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:10:05,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:05,083 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:05,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:05,283 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 15:10:05,284 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:10:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1768093190, now seen corresponding path program 121 times [2021-08-06 15:10:05,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:05,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408995047] [2021-08-06 15:10:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:05,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:05,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:05,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408995047] [2021-08-06 15:10:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408995047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:05,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115501434] [2021-08-06 15:10:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:10:05,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:05,679 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 15:10:05,680 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 15:10:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:10:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:12,426 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:10:12,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-08-06 15:10:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:12,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115501434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:12,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:12,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:10:12,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122869253] [2021-08-06 15:10:12,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:10:12,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:12,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:10:12,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:10:12,680 INFO L87 Difference]: Start difference. First operand 1488 states and 3011 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:13,816 INFO L93 Difference]: Finished difference Result 1640 states and 3279 transitions. [2021-08-06 15:10:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:10:13,816 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:10:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:13,818 INFO L225 Difference]: With dead ends: 1640 [2021-08-06 15:10:13,818 INFO L226 Difference]: Without dead ends: 1551 [2021-08-06 15:10:13,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1119.8ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:10:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2021-08-06 15:10:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1495. [2021-08-06 15:10:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0247657295850066) internal successors, (3025), 1494 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3025 transitions. [2021-08-06 15:10:13,831 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3025 transitions. Word has length 33 [2021-08-06 15:10:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:13,831 INFO L470 AbstractCegarLoop]: Abstraction has 1495 states and 3025 transitions. [2021-08-06 15:10:13,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3025 transitions. [2021-08-06 15:10:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:10:13,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:13,832 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:13,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 15:10:14,033 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 15:10:14,034 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:10:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1270752486, now seen corresponding path program 122 times [2021-08-06 15:10:14,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:14,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520064184] [2021-08-06 15:10:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:14,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:14,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:14,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520064184] [2021-08-06 15:10:14,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520064184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:14,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735302972] [2021-08-06 15:10:14,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:10:14,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:14,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:14,414 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 15:10:14,414 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 15:10:20,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:10:20,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:10:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:21,057 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:10:21,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-08-06 15:10:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:21,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735302972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:21,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:21,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:10:21,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080211687] [2021-08-06 15:10:21,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:10:21,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:10:21,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:10:21,431 INFO L87 Difference]: Start difference. First operand 1495 states and 3025 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:22,954 INFO L93 Difference]: Finished difference Result 1670 states and 3352 transitions. [2021-08-06 15:10:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:10:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:10:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:22,957 INFO L225 Difference]: With dead ends: 1670 [2021-08-06 15:10:22,957 INFO L226 Difference]: Without dead ends: 1611 [2021-08-06 15:10:22,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1375.4ms TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:10:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-08-06 15:10:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1495. [2021-08-06 15:10:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0247657295850066) internal successors, (3025), 1494 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3025 transitions. [2021-08-06 15:10:22,971 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3025 transitions. Word has length 33 [2021-08-06 15:10:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:22,971 INFO L470 AbstractCegarLoop]: Abstraction has 1495 states and 3025 transitions. [2021-08-06 15:10:22,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3025 transitions. [2021-08-06 15:10:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:10:22,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:22,972 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:23,007 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 15:10:23,177 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 15:10:23,177 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:10:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1440778296, now seen corresponding path program 123 times [2021-08-06 15:10:23,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:23,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263928589] [2021-08-06 15:10:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:23,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:23,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:23,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263928589] [2021-08-06 15:10:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263928589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:23,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135887281] [2021-08-06 15:10:23,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:10:23,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:23,521 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 15:10:23,523 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 15:10:29,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:10:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:10:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:30,391 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:10:30,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-06 15:10:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:30,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135887281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:30,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:30,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:10:30,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133432876] [2021-08-06 15:10:30,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:10:30,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:10:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:10:30,646 INFO L87 Difference]: Start difference. First operand 1495 states and 3025 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:31,988 INFO L93 Difference]: Finished difference Result 1715 states and 3430 transitions. [2021-08-06 15:10:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:10:31,988 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:10:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:31,990 INFO L225 Difference]: With dead ends: 1715 [2021-08-06 15:10:31,990 INFO L226 Difference]: Without dead ends: 1619 [2021-08-06 15:10:31,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1079.0ms TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:10:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-08-06 15:10:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1534. [2021-08-06 15:10:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 2.026092628832355) internal successors, (3106), 1533 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 3106 transitions. [2021-08-06 15:10:32,004 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 3106 transitions. Word has length 33 [2021-08-06 15:10:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:32,004 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 3106 transitions. [2021-08-06 15:10:32,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 3106 transitions. [2021-08-06 15:10:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:10:32,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:32,006 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:32,041 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 15:10:32,208 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 15:10:32,209 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:10:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1468566410, now seen corresponding path program 124 times [2021-08-06 15:10:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:32,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94033475] [2021-08-06 15:10:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:32,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:32,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:32,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94033475] [2021-08-06 15:10:32,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94033475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:32,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427434210] [2021-08-06 15:10:32,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:10:32,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:32,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:32,548 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 15:10:32,554 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 15:10:38,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:10:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:10:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:39,436 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:10:39,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-08-06 15:10:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:39,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427434210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:39,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:39,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:10:39,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781042234] [2021-08-06 15:10:39,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:10:39,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:39,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:10:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:10:39,710 INFO L87 Difference]: Start difference. First operand 1534 states and 3106 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:41,618 INFO L93 Difference]: Finished difference Result 1833 states and 3682 transitions. [2021-08-06 15:10:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:10:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:10:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:41,621 INFO L225 Difference]: With dead ends: 1833 [2021-08-06 15:10:41,621 INFO L226 Difference]: Without dead ends: 1731 [2021-08-06 15:10:41,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1545.0ms TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:10:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-08-06 15:10:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1577. [2021-08-06 15:10:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.029187817258883) internal successors, (3198), 1576 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 3198 transitions. [2021-08-06 15:10:41,635 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 3198 transitions. Word has length 33 [2021-08-06 15:10:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:41,635 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 3198 transitions. [2021-08-06 15:10:41,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:10:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 3198 transitions. [2021-08-06 15:10:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:10:41,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:41,636 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:41,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 15:10:41,855 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 15:10:41,855 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:10:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:41,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2109677000, now seen corresponding path program 125 times [2021-08-06 15:10:41,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:41,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634870884] [2021-08-06 15:10:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:41,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:42,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:42,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634870884] [2021-08-06 15:10:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634870884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:42,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31319798] [2021-08-06 15:10:42,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:10:42,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:42,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:42,252 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 15:10:42,253 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 15:10:48,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:10:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:10:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:49,056 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:10:49,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-08-06 15:10:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:49,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31319798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:49,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:49,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-06 15:10:49,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139420104] [2021-08-06 15:10:49,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:10:49,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:10:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:10:49,441 INFO L87 Difference]: Start difference. First operand 1577 states and 3198 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 15:10:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:52,021 INFO L93 Difference]: Finished difference Result 1986 states and 4002 transitions. [2021-08-06 15:10:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 15:10:52,021 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 33 [2021-08-06 15:10:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:52,024 INFO L225 Difference]: With dead ends: 1986 [2021-08-06 15:10:52,024 INFO L226 Difference]: Without dead ends: 1887 [2021-08-06 15:10:52,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2122.8ms TimeCoverageRelationStatistics Valid=793, Invalid=7579, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 15:10:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-08-06 15:10:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1598. [2021-08-06 15:10:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.026299311208516) internal successors, (3236), 1597 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 3236 transitions. [2021-08-06 15:10:52,039 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 3236 transitions. Word has length 33 [2021-08-06 15:10:52,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:52,039 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 3236 transitions. [2021-08-06 15:10:52,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 15:10:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 3236 transitions. [2021-08-06 15:10:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:10:52,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:52,041 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:52,076 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 15:10:52,261 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 15:10:52,261 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:10:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -683434634, now seen corresponding path program 126 times [2021-08-06 15:10:52,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:52,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944811849] [2021-08-06 15:10:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:52,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:52,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:52,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944811849] [2021-08-06 15:10:52,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944811849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:52,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506957317] [2021-08-06 15:10:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:10:52,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:52,643 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 15:10:52,643 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 15:10:59,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:10:59,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:10:59,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:59,518 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:10:59,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-06 15:10:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:59,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506957317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:59,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:59,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:10:59,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124283275] [2021-08-06 15:10:59,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:10:59,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:59,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:10:59,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:10:59,843 INFO L87 Difference]: Start difference. First operand 1598 states and 3236 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:11:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:11:02,666 INFO L93 Difference]: Finished difference Result 2100 states and 4228 transitions. [2021-08-06 15:11:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 15:11:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-08-06 15:11:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:11:02,668 INFO L225 Difference]: With dead ends: 2100 [2021-08-06 15:11:02,668 INFO L226 Difference]: Without dead ends: 2038 [2021-08-06 15:11:02,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 2238.6ms TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 15:11:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-08-06 15:11:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1688. [2021-08-06 15:11:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 2.028452874925904) internal successors, (3422), 1687 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:11:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 3422 transitions. [2021-08-06 15:11:02,684 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 3422 transitions. Word has length 33 [2021-08-06 15:11:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:11:02,684 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 3422 transitions. [2021-08-06 15:11:02,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 15:11:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 3422 transitions. [2021-08-06 15:11:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:11:02,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:11:02,686 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:11:02,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 15:11:02,887 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 15:11:02,887 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:11:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:11:02,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1598067380, now seen corresponding path program 127 times [2021-08-06 15:11:02,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:11:02,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971428537] [2021-08-06 15:11:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:11:02,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:11:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:03,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:11:03,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971428537] [2021-08-06 15:11:03,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971428537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:03,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441359171] [2021-08-06 15:11:03,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:11:03,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:11:03,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:11:03,223 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 15:11:03,223 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 15:11:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:11:09,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:11:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:11:10,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:11:10,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-06 15:11:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:11:10,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441359171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:11:10,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:11:10,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-06 15:11:10,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819889129] [2021-08-06 15:11:10,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:11:10,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:11:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:11:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:11:10,513 INFO L87 Difference]: Start difference. First operand 1688 states and 3422 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) Received shutdown request... [2021-08-06 15:11:11,123 WARN L223 SmtUtils]: Removed 3 from assertion stack [2021-08-06 15:11:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:11:11,124 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:11:11,136 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:11:11,136 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 15:11:11,158 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 15:11:11,324 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 15:11:11,324 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1688states) and FLOYD_HOARE automaton (currently 19 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 34ms.. [2021-08-06 15:11:11,326 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:11:11,326 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:11:11,329 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:11:11,329 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:11:11,330 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:11:11 BasicIcfg [2021-08-06 15:11:11,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:11:11,331 INFO L168 Benchmark]: Toolchain (without parser) took 730969.71 ms. Allocated memory was 206.6 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 186.5 MB in the beginning and 250.9 MB in the end (delta: -64.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-06 15:11:11,331 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:11:11,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.50 ms. Allocated memory is still 206.6 MB. Free memory was 186.4 MB in the beginning and 184.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:11:11,331 INFO L168 Benchmark]: Boogie Preprocessor took 14.98 ms. Allocated memory is still 206.6 MB. Free memory was 184.9 MB in the beginning and 184.0 MB in the end (delta: 937.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:11:11,331 INFO L168 Benchmark]: RCFGBuilder took 224.86 ms. Allocated memory is still 206.6 MB. Free memory was 183.9 MB in the beginning and 171.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:11:11,331 INFO L168 Benchmark]: TraceAbstraction took 730704.63 ms. Allocated memory was 206.6 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 170.5 MB in the beginning and 250.9 MB in the end (delta: -80.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-06 15:11:11,331 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 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.50 ms. Allocated memory is still 206.6 MB. Free memory was 186.4 MB in the beginning and 184.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.98 ms. Allocated memory is still 206.6 MB. Free memory was 184.9 MB in the beginning and 184.0 MB in the end (delta: 937.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 224.86 ms. Allocated memory is still 206.6 MB. Free memory was 183.9 MB in the beginning and 171.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 730704.63 ms. Allocated memory was 206.6 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 170.5 MB in the beginning and 250.9 MB in the end (delta: -80.5 MB). Peak memory consumption was 1.2 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: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1688states) and FLOYD_HOARE automaton (currently 19 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 34ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1688states) and FLOYD_HOARE automaton (currently 19 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 34ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1688states) and FLOYD_HOARE automaton (currently 19 states, 32 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 34ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 730616.7ms, OverallIterations: 133, TraceHistogramMax: 3, EmptinessCheckTime: 119.3ms, AutomataDifference: 166080.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6488 SDtfs, 19351 SDslu, 75266 SDs, 0 SdLazy, 160346 SolverSat, 8569 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57574.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9910 GetRequests, 2472 SyntacticMatches, 334 SemanticMatches, 7103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124595 ImplicationChecksByTransitivity, 146865.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1688occurred in iteration=132, InterpolantAutomatonStates: 5246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1007.8ms AutomataMinimizationTime, 132 MinimizatonAttempts, 18868 StatesRemovedByMinimization, 130 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 421.1ms SsaConstructionTime, 2017.2ms SatisfiabilityAnalysisTime, 136295.5ms InterpolantComputationTime, 8302 NumberOfCodeBlocks, 8302 NumberOfCodeBlocksAsserted, 412 NumberOfCheckSat, 8038 ConstructedInterpolants, 445 QuantifiedInterpolants, 122655 SizeOfPredicates, 1099 NumberOfNonLiveVariables, 9131 ConjunctsInSsa, 4045 ConjunctsInUnsatCore, 264 InterpolantComputations, 3 PerfectInterpolantSequences, 42/4595 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