/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/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:07:29,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:07:29,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:07:29,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:07:29,382 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 14:07:29,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:07:29,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:07:29,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:07:29,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:07:29,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:07:29,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:07:29,400 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:07:29,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:07:29,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:07:29,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:07:29,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:07:29,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:07:29,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:07:29,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:07:29,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:07:29,401 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:07:29,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:07:29,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:07:29,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:07:29,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:07:29,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:07:29,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:07:29,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:07:29,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:07:29,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:07:29,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:07:29,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:07:29,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:07:29,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:07:29,403 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:07:29,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:07:29,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:07:29,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:07:29,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:07:29,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:07:29,701 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:07:29,707 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:07:29,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-08-06 14:07:29,708 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-08-06 14:07:29,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:07:29,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:07:29,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:07:29,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:07:29,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:07:29,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:07:29,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:07:29,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:07:29,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:07:29,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:07:29,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:07:29,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:07:29,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:07:29,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/1) ... [2021-08-06 14:07:29,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:07:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:29,798 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 14:07:29,806 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 14:07:29,828 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:07:29,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:07:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:07:29,829 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:07:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:07:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:07:29,829 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:07:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:07:29,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:07:29,830 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 14:07:29,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:07:29,963 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:07:29,964 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:07:29 BoogieIcfgContainer [2021-08-06 14:07:29,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:07:29,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:07:29,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:07:29,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:07:29,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:07:29" (1/2) ... [2021-08-06 14:07:29,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfaac43 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:07:29, skipping insertion in model container [2021-08-06 14:07:29,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:07:29" (2/2) ... [2021-08-06 14:07:29,969 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-08-06 14:07:29,972 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:07:29,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:07:29,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:07:29,973 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:07:29,996 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 14:07:30,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:07:30,033 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 14:07:30,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 14:07:30,039 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-08-06 14:07:30,051 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:07:30,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:30,079 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:30,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash -167955401, now seen corresponding path program 1 times [2021-08-06 14:07:30,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:30,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395457797] [2021-08-06 14:07:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:30,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:30,238 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 14:07:30,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:30,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395457797] [2021-08-06 14:07:30,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395457797] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:30,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:30,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:07:30,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595556869] [2021-08-06 14:07:30,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:07:30,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:07:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:07:30,253 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:30,289 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-08-06 14:07:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:07:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:07:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:30,298 INFO L225 Difference]: With dead ends: 102 [2021-08-06 14:07:30,298 INFO L226 Difference]: Without dead ends: 95 [2021-08-06 14:07:30,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:07:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-06 14:07:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-08-06 14:07:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-08-06 14:07:30,326 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-08-06 14:07:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:30,327 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-08-06 14:07:30,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-08-06 14:07:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:07:30,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:30,328 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:30,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:07:30,328 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1051815822, now seen corresponding path program 1 times [2021-08-06 14:07:30,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:30,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065816973] [2021-08-06 14:07:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:30,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:30,443 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 14:07:30,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:30,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065816973] [2021-08-06 14:07:30,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065816973] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:30,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:30,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:07:30,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686979953] [2021-08-06 14:07:30,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:07:30,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:07:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:07:30,451 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:30,508 INFO L93 Difference]: Finished difference Result 128 states and 286 transitions. [2021-08-06 14:07:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:07:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:07:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:30,510 INFO L225 Difference]: With dead ends: 128 [2021-08-06 14:07:30,510 INFO L226 Difference]: Without dead ends: 128 [2021-08-06 14:07:30,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:07:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-06 14:07:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2021-08-06 14:07:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 88 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 204 transitions. [2021-08-06 14:07:30,520 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 204 transitions. Word has length 14 [2021-08-06 14:07:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:30,520 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 204 transitions. [2021-08-06 14:07:30,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 204 transitions. [2021-08-06 14:07:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:07:30,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:30,527 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:30,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:07:30,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:30,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1207263346, now seen corresponding path program 2 times [2021-08-06 14:07:30,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:30,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601864060] [2021-08-06 14:07:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:30,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:30,607 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 14:07:30,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:30,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601864060] [2021-08-06 14:07:30,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601864060] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:30,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:30,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:07:30,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541268324] [2021-08-06 14:07:30,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:07:30,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:07:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:30,609 INFO L87 Difference]: Start difference. First operand 89 states and 204 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:30,654 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2021-08-06 14:07:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:07:30,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:07:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:30,656 INFO L225 Difference]: With dead ends: 152 [2021-08-06 14:07:30,656 INFO L226 Difference]: Without dead ends: 152 [2021-08-06 14:07:30,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-06 14:07:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 94. [2021-08-06 14:07:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-08-06 14:07:30,669 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-08-06 14:07:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:30,669 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-08-06 14:07:30,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-08-06 14:07:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:07:30,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:30,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:30,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:07:30,671 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:30,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:30,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1376889075, now seen corresponding path program 1 times [2021-08-06 14:07:30,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:30,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765478853] [2021-08-06 14:07:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:30,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:30,748 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 14:07:30,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:30,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765478853] [2021-08-06 14:07:30,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765478853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:30,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:30,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:07:30,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310946472] [2021-08-06 14:07:30,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:07:30,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:30,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:07:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:07:30,750 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:30,802 INFO L93 Difference]: Finished difference Result 138 states and 314 transitions. [2021-08-06 14:07:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:07:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:07:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:30,806 INFO L225 Difference]: With dead ends: 138 [2021-08-06 14:07:30,806 INFO L226 Difference]: Without dead ends: 130 [2021-08-06 14:07:30,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-06 14:07:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-08-06 14:07:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.292929292929293) internal successors, (227), 99 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2021-08-06 14:07:30,824 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 14 [2021-08-06 14:07:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:30,824 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2021-08-06 14:07:30,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2021-08-06 14:07:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:07:30,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:30,827 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:30,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:07:30,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash 633913395, now seen corresponding path program 2 times [2021-08-06 14:07:30,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:30,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245213358] [2021-08-06 14:07:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:30,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:30,917 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 14:07:30,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:30,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245213358] [2021-08-06 14:07:30,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245213358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:30,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956167392] [2021-08-06 14:07:30,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:07:30,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:30,919 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 14:07:30,937 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 14:07:30,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:07:30,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:30,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 14:07:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:31,205 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 14:07:31,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956167392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:31,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:31,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 14:07:31,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687281010] [2021-08-06 14:07:31,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:07:31,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:07:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:07:31,208 INFO L87 Difference]: Start difference. First operand 100 states and 227 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:31,302 INFO L93 Difference]: Finished difference Result 150 states and 346 transitions. [2021-08-06 14:07:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:07:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:07:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:31,304 INFO L225 Difference]: With dead ends: 150 [2021-08-06 14:07:31,304 INFO L226 Difference]: Without dead ends: 150 [2021-08-06 14:07:31,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-06 14:07:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2021-08-06 14:07:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-08-06 14:07:31,308 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-08-06 14:07:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:31,308 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-08-06 14:07:31,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-08-06 14:07:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:07:31,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:31,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:31,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:07:31,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:31,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:31,528 INFO L82 PathProgramCache]: Analyzing trace with hash 56537190, now seen corresponding path program 3 times [2021-08-06 14:07:31,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:31,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559079427] [2021-08-06 14:07:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:31,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:31,574 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 14:07:31,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:31,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559079427] [2021-08-06 14:07:31,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559079427] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:31,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:31,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:07:31,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275299682] [2021-08-06 14:07:31,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:07:31,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:07:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:07:31,575 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:31,607 INFO L93 Difference]: Finished difference Result 134 states and 303 transitions. [2021-08-06 14:07:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:07:31,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:07:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:31,609 INFO L225 Difference]: With dead ends: 134 [2021-08-06 14:07:31,609 INFO L226 Difference]: Without dead ends: 132 [2021-08-06 14:07:31,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-06 14:07:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2021-08-06 14:07:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-08-06 14:07:31,612 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-08-06 14:07:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:31,613 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-08-06 14:07:31,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-08-06 14:07:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:07:31,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:31,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:31,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:07:31,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:31,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:31,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2012435128, now seen corresponding path program 1 times [2021-08-06 14:07:31,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:31,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133696196] [2021-08-06 14:07:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:31,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:31,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:31,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133696196] [2021-08-06 14:07:31,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133696196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:31,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385007584] [2021-08-06 14:07:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:31,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:31,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:31,677 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 14:07:31,678 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 14:07:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:31,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:31,915 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 14:07:31,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385007584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:31,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:31,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-06 14:07:31,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124283786] [2021-08-06 14:07:31,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:31,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:31,917 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 14:07:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:32,001 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-08-06 14:07:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:07:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 17 [2021-08-06 14:07:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:32,003 INFO L225 Difference]: With dead ends: 300 [2021-08-06 14:07:32,004 INFO L226 Difference]: Without dead ends: 286 [2021-08-06 14:07:32,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-06 14:07:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-08-06 14:07:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-08-06 14:07:32,009 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-08-06 14:07:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:32,015 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-08-06 14:07:32,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 14:07:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-08-06 14:07:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:07:32,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:32,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:32,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 14:07:32,233 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,SelfDestructingSolverStorable6 [2021-08-06 14:07:32,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:32,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash 617878888, now seen corresponding path program 1 times [2021-08-06 14:07:32,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:32,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127390923] [2021-08-06 14:07:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:32,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:32,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:32,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127390923] [2021-08-06 14:07:32,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127390923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:32,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987689267] [2021-08-06 14:07:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:32,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:32,306 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 14:07:32,307 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 14:07:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:32,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:32,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:32,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987689267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:32,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:32,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-06 14:07:32,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611161724] [2021-08-06 14:07:32,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:32,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:32,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:32,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:32,490 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:32,556 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-08-06 14:07:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:07:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:07:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:32,557 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:07:32,557 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 14:07:32,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:07:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 14:07:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-08-06 14:07:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-08-06 14:07:32,563 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-08-06 14:07:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:32,563 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-08-06 14:07:32,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-08-06 14:07:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:07:32,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:32,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:32,584 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 14:07:32,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:32,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash 456277538, now seen corresponding path program 2 times [2021-08-06 14:07:32,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:32,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974306757] [2021-08-06 14:07:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:32,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:07:32,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:32,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974306757] [2021-08-06 14:07:32,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974306757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:32,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:32,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:07:32,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166673406] [2021-08-06 14:07:32,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:07:32,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:07:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:07:32,809 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:32,834 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-08-06 14:07:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:07:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:07:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:32,836 INFO L225 Difference]: With dead ends: 311 [2021-08-06 14:07:32,836 INFO L226 Difference]: Without dead ends: 304 [2021-08-06 14:07:32,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:07:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-06 14:07:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-08-06 14:07:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-08-06 14:07:32,842 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-08-06 14:07:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:32,842 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-08-06 14:07:32,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-08-06 14:07:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:07:32,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:32,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:32,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 14:07:32,843 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash 614663528, now seen corresponding path program 1 times [2021-08-06 14:07:32,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:32,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634102452] [2021-08-06 14:07:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:32,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:32,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:32,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634102452] [2021-08-06 14:07:32,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634102452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:32,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413712553] [2021-08-06 14:07:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:32,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:32,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:32,881 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 14:07:32,916 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 14:07:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:32,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:33,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413712553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:33,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:33,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-06 14:07:33,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702937278] [2021-08-06 14:07:33,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:07:33,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:07:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:07:33,059 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:33,116 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-08-06 14:07:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:07:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:07:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:33,117 INFO L225 Difference]: With dead ends: 243 [2021-08-06 14:07:33,117 INFO L226 Difference]: Without dead ends: 208 [2021-08-06 14:07:33,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-06 14:07:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-08-06 14:07:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-08-06 14:07:33,121 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-08-06 14:07:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:33,121 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-08-06 14:07:33,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-08-06 14:07:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:07:33,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:33,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:33,141 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 14:07:33,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:33,323 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash -38242968, now seen corresponding path program 2 times [2021-08-06 14:07:33,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:33,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693800422] [2021-08-06 14:07:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:33,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:33,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:33,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693800422] [2021-08-06 14:07:33,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693800422] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:33,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:33,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:07:33,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542880717] [2021-08-06 14:07:33,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:07:33,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:07:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:33,361 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:33,396 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-08-06 14:07:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:07:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:07:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:33,398 INFO L225 Difference]: With dead ends: 222 [2021-08-06 14:07:33,398 INFO L226 Difference]: Without dead ends: 222 [2021-08-06 14:07:33,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:07:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-06 14:07:33,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-08-06 14:07:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 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 14:07:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-08-06 14:07:33,404 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-08-06 14:07:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:33,404 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-08-06 14:07:33,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-08-06 14:07:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:33,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:33,405 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:33,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 14:07:33,406 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash 417389902, now seen corresponding path program 3 times [2021-08-06 14:07:33,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:33,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682803224] [2021-08-06 14:07:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:33,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:33,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:33,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682803224] [2021-08-06 14:07:33,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682803224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:33,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132414533] [2021-08-06 14:07:33,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:07:33,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:33,465 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 14:07:33,466 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 14:07:33,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:07:33,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:33,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:33,998 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 14:07:33,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132414533] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:33,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:07:33,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-08-06 14:07:33,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295638681] [2021-08-06 14:07:33,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:07:33,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:07:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:07:33,999 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:34,161 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-08-06 14:07:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:07:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:34,163 INFO L225 Difference]: With dead ends: 421 [2021-08-06 14:07:34,163 INFO L226 Difference]: Without dead ends: 414 [2021-08-06 14:07:34,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:07:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-06 14:07:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-08-06 14:07:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-08-06 14:07:34,169 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-08-06 14:07:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:34,169 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-08-06 14:07:34,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-08-06 14:07:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:34,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:34,170 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:34,189 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 14:07:34,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 14:07:34,378 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:34,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1841689266, now seen corresponding path program 4 times [2021-08-06 14:07:34,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:34,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274512646] [2021-08-06 14:07:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:34,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:34,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:34,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274512646] [2021-08-06 14:07:34,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274512646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:34,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400668662] [2021-08-06 14:07:34,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:07:34,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:34,450 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 14:07:34,450 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 14:07:34,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:07:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:07:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:34,782 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 14:07:34,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400668662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:34,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:07:34,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-06 14:07:34,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278951819] [2021-08-06 14:07:34,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:34,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:34,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:34,785 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:34,863 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-08-06 14:07:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:07:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:34,865 INFO L225 Difference]: With dead ends: 592 [2021-08-06 14:07:34,866 INFO L226 Difference]: Without dead ends: 592 [2021-08-06 14:07:34,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:07:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-06 14:07:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-08-06 14:07:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-08-06 14:07:34,874 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-08-06 14:07:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:34,874 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-08-06 14:07:34,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-08-06 14:07:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:34,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:34,876 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:34,895 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 14:07:35,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:35,089 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1408864728, now seen corresponding path program 5 times [2021-08-06 14:07:35,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:35,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893168274] [2021-08-06 14:07:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:35,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:35,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:35,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893168274] [2021-08-06 14:07:35,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893168274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:35,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914146282] [2021-08-06 14:07:35,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:07:35,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:35,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:35,153 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 14:07:35,232 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 14:07:35,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:07:35,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:35,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914146282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:35,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:35,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 14:07:35,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055752320] [2021-08-06 14:07:35,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:07:35,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:07:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:07:35,522 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:35,674 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-08-06 14:07:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:07:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:35,678 INFO L225 Difference]: With dead ends: 751 [2021-08-06 14:07:35,678 INFO L226 Difference]: Without dead ends: 751 [2021-08-06 14:07:35,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:07:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-06 14:07:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-08-06 14:07:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-08-06 14:07:35,691 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-08-06 14:07:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:35,691 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-08-06 14:07:35,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-08-06 14:07:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:35,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:35,693 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:35,720 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 14:07:35,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:35,912 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:35,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2078534299, now seen corresponding path program 6 times [2021-08-06 14:07:35,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:35,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102280164] [2021-08-06 14:07:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:35,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:35,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:35,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102280164] [2021-08-06 14:07:35,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102280164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:35,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381113649] [2021-08-06 14:07:35,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:07:35,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:35,955 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 14:07:35,956 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 14:07:36,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:07:36,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:36,216 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 14:07:36,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381113649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:36,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:36,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:07:36,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125875790] [2021-08-06 14:07:36,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:36,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:36,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:36,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:36,217 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:36,297 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-08-06 14:07:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:07:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:36,302 INFO L225 Difference]: With dead ends: 960 [2021-08-06 14:07:36,302 INFO L226 Difference]: Without dead ends: 956 [2021-08-06 14:07:36,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:07:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-08-06 14:07:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-08-06 14:07:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-08-06 14:07:36,328 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-08-06 14:07:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:36,328 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-08-06 14:07:36,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-08-06 14:07:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:36,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:36,331 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:36,352 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 14:07:36,548 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,SelfDestructingSolverStorable14 [2021-08-06 14:07:36,549 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1456653889, now seen corresponding path program 7 times [2021-08-06 14:07:36,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:36,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342510019] [2021-08-06 14:07:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:36,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:36,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:36,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342510019] [2021-08-06 14:07:36,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342510019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:36,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365625394] [2021-08-06 14:07:36,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:07:36,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:36,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:36,604 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 14:07:36,623 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 14:07:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:36,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:36,890 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 14:07:36,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365625394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:36,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:36,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:07:36,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255381395] [2021-08-06 14:07:36,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:36,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:36,892 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:37,008 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-08-06 14:07:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:07:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:37,012 INFO L225 Difference]: With dead ends: 966 [2021-08-06 14:07:37,013 INFO L226 Difference]: Without dead ends: 966 [2021-08-06 14:07:37,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-08-06 14:07:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-08-06 14:07:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-08-06 14:07:37,036 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-08-06 14:07:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:37,037 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-08-06 14:07:37,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-08-06 14:07:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:37,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:37,038 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:37,065 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 14:07:37,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 14:07:37,257 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:37,257 INFO L82 PathProgramCache]: Analyzing trace with hash 524837442, now seen corresponding path program 8 times [2021-08-06 14:07:37,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:37,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198003399] [2021-08-06 14:07:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:37,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:37,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:37,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198003399] [2021-08-06 14:07:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198003399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:37,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193773515] [2021-08-06 14:07:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:07:37,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:37,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:37,305 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 14:07:37,305 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 14:07:37,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:07:37,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:37,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:37,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:37,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193773515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:37,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:37,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:07:37,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724057587] [2021-08-06 14:07:37,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:07:37,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:07:37,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:07:37,606 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:37,658 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-08-06 14:07:37,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:07:37,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:37,662 INFO L225 Difference]: With dead ends: 861 [2021-08-06 14:07:37,662 INFO L226 Difference]: Without dead ends: 858 [2021-08-06 14:07:37,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-08-06 14:07:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-08-06 14:07:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-08-06 14:07:37,677 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-08-06 14:07:37,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:37,677 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-08-06 14:07:37,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-08-06 14:07:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:37,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:37,678 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:37,698 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 14:07:37,885 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,SelfDestructingSolverStorable16 [2021-08-06 14:07:37,885 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash -855067826, now seen corresponding path program 9 times [2021-08-06 14:07:37,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:37,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601587896] [2021-08-06 14:07:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:37,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:37,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:37,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601587896] [2021-08-06 14:07:37,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601587896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:37,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589790477] [2021-08-06 14:07:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:07:37,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:37,934 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 14:07:37,958 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 14:07:38,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:07:38,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:38,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589790477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:38,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:38,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:07:38,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715577746] [2021-08-06 14:07:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:07:38,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:07:38,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:07:38,241 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:38,311 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-08-06 14:07:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:07:38,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:38,315 INFO L225 Difference]: With dead ends: 1114 [2021-08-06 14:07:38,316 INFO L226 Difference]: Without dead ends: 1114 [2021-08-06 14:07:38,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-08-06 14:07:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-08-06 14:07:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-08-06 14:07:38,334 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-08-06 14:07:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:38,334 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-08-06 14:07:38,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-08-06 14:07:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:38,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:38,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:38,354 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 14:07:38,551 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,SelfDestructingSolverStorable17 [2021-08-06 14:07:38,551 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1432444031, now seen corresponding path program 10 times [2021-08-06 14:07:38,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:38,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339273491] [2021-08-06 14:07:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:38,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:38,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:38,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339273491] [2021-08-06 14:07:38,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339273491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:38,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595511384] [2021-08-06 14:07:38,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:07:38,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:38,594 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 14:07:38,594 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 14:07:38,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:07:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:38,896 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 14:07:38,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595511384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:38,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:07:38,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885723223] [2021-08-06 14:07:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:38,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:38,900 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:38,990 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-08-06 14:07:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:07:38,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:38,995 INFO L225 Difference]: With dead ends: 1380 [2021-08-06 14:07:38,995 INFO L226 Difference]: Without dead ends: 1370 [2021-08-06 14:07:38,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-08-06 14:07:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-08-06 14:07:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-08-06 14:07:39,020 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-08-06 14:07:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:39,020 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-08-06 14:07:39,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-08-06 14:07:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:39,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:39,022 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:39,043 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 14:07:39,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:39,237 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2054324441, now seen corresponding path program 11 times [2021-08-06 14:07:39,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:39,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502468566] [2021-08-06 14:07:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:39,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:39,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:39,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502468566] [2021-08-06 14:07:39,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502468566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:39,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120404121] [2021-08-06 14:07:39,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:07:39,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:39,281 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 14:07:39,291 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 14:07:39,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:07:39,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:39,574 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 14:07:39,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120404121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:39,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:39,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:07:39,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333136086] [2021-08-06 14:07:39,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:39,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:39,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:39,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:39,575 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:39,669 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-08-06 14:07:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:07:39,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:39,675 INFO L225 Difference]: With dead ends: 1400 [2021-08-06 14:07:39,675 INFO L226 Difference]: Without dead ends: 1400 [2021-08-06 14:07:39,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-08-06 14:07:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-08-06 14:07:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-08-06 14:07:39,714 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-08-06 14:07:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:39,714 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-08-06 14:07:39,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-08-06 14:07:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:39,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:39,717 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:39,736 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 14:07:39,932 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,SelfDestructingSolverStorable19 [2021-08-06 14:07:39,933 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1308826408, now seen corresponding path program 12 times [2021-08-06 14:07:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:39,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175849222] [2021-08-06 14:07:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:39,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:39,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:39,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175849222] [2021-08-06 14:07:39,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175849222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:39,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720320663] [2021-08-06 14:07:39,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:07:39,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:39,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:39,975 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 14:07:40,013 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 14:07:40,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:07:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720320663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:40,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:40,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:07:40,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888595380] [2021-08-06 14:07:40,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:07:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:07:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:07:40,290 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:40,348 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-08-06 14:07:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:07:40,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:40,354 INFO L225 Difference]: With dead ends: 1485 [2021-08-06 14:07:40,354 INFO L226 Difference]: Without dead ends: 1482 [2021-08-06 14:07:40,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-08-06 14:07:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-08-06 14:07:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-08-06 14:07:40,378 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-08-06 14:07:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-08-06 14:07:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-08-06 14:07:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:40,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:40,380 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:40,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:07:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:40,597 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash 603070399, now seen corresponding path program 13 times [2021-08-06 14:07:40,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:40,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742320326] [2021-08-06 14:07:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:40,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:40,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:40,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742320326] [2021-08-06 14:07:40,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742320326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:40,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972163917] [2021-08-06 14:07:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:07:40,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:40,647 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 14:07:40,647 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 14:07:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:40,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:40,963 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 14:07:40,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972163917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:40,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:40,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 14:07:40,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61542787] [2021-08-06 14:07:40,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:07:40,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:40,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:07:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:07:40,964 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:41,099 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-08-06 14:07:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:07:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:41,104 INFO L225 Difference]: With dead ends: 1426 [2021-08-06 14:07:41,104 INFO L226 Difference]: Without dead ends: 1426 [2021-08-06 14:07:41,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:07:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-08-06 14:07:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-08-06 14:07:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-08-06 14:07:41,126 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-08-06 14:07:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:41,126 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-08-06 14:07:41,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-08-06 14:07:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:07:41,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:41,128 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:41,148 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 14:07:41,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:41,337 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1515888974, now seen corresponding path program 14 times [2021-08-06 14:07:41,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:41,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985260563] [2021-08-06 14:07:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:41,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:41,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:41,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985260563] [2021-08-06 14:07:41,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985260563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:41,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360446281] [2021-08-06 14:07:41,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:07:41,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:41,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:41,391 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 14:07:41,392 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 14:07:41,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:07:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:07:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:41,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360446281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:41,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:41,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:07:41,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252603618] [2021-08-06 14:07:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:41,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:41,747 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:41,849 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-08-06 14:07:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:07:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:07:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:41,854 INFO L225 Difference]: With dead ends: 1396 [2021-08-06 14:07:41,855 INFO L226 Difference]: Without dead ends: 1382 [2021-08-06 14:07:41,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-08-06 14:07:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-08-06 14:07:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-08-06 14:07:41,877 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-08-06 14:07:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:41,877 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-08-06 14:07:41,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-08-06 14:07:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:41,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:41,879 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 14:07:41,898 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 14:07:42,092 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,SelfDestructingSolverStorable22 [2021-08-06 14:07:42,093 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1957491467, now seen corresponding path program 1 times [2021-08-06 14:07:42,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:42,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309867377] [2021-08-06 14:07:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:42,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:42,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:42,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309867377] [2021-08-06 14:07:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309867377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:42,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713524671] [2021-08-06 14:07:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:42,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:42,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:42,169 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 14:07:42,170 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 14:07:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:42,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:42,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713524671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:42,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:42,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 14:07:42,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138312048] [2021-08-06 14:07:42,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:07:42,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:07:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:07:42,576 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:42,891 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-08-06 14:07:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:07:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:42,897 INFO L225 Difference]: With dead ends: 1620 [2021-08-06 14:07:42,897 INFO L226 Difference]: Without dead ends: 1620 [2021-08-06 14:07:42,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:07:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-08-06 14:07:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-08-06 14:07:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.6908957415565347) internal successors, (3665), 1362 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-08-06 14:07:42,937 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-08-06 14:07:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:42,938 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-08-06 14:07:42,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-08-06 14:07:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:42,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:42,940 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:42,961 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 14:07:43,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:43,157 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1617196245, now seen corresponding path program 15 times [2021-08-06 14:07:43,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:43,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478906818] [2021-08-06 14:07:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:43,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:07:43,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:43,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478906818] [2021-08-06 14:07:43,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478906818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:43,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844960745] [2021-08-06 14:07:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:07:43,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:43,201 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 14:07:43,225 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 14:07:43,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:07:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:43,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:07:43,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844960745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:43,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:43,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-06 14:07:43,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693604430] [2021-08-06 14:07:43,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:07:43,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:07:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:43,592 INFO L87 Difference]: Start difference. First operand 1363 states and 3665 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 14:07:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:43,662 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-08-06 14:07:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:07:43,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 14:07:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:43,669 INFO L225 Difference]: With dead ends: 1903 [2021-08-06 14:07:43,669 INFO L226 Difference]: Without dead ends: 1896 [2021-08-06 14:07:43,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-08-06 14:07:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-08-06 14:07:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 2.693207126948775) internal successors, (4837), 1796 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-08-06 14:07:43,702 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-08-06 14:07:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:43,702 INFO L470 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-08-06 14:07:43,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 14:07:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-08-06 14:07:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:43,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:43,704 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:43,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:07:43,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:43,924 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1684522285, now seen corresponding path program 16 times [2021-08-06 14:07:43,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:43,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405688527] [2021-08-06 14:07:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:43,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:07:43,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:43,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405688527] [2021-08-06 14:07:43,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405688527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:43,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773209908] [2021-08-06 14:07:43,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:07:43,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:43,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:43,966 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 14:07:44,012 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 14:07:44,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:07:44,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:07:44,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773209908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:44,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:44,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-06 14:07:44,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646643452] [2021-08-06 14:07:44,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:07:44,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:07:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:44,382 INFO L87 Difference]: Start difference. First operand 1797 states and 4837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:44,451 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-08-06 14:07:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:07:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:44,456 INFO L225 Difference]: With dead ends: 2099 [2021-08-06 14:07:44,456 INFO L226 Difference]: Without dead ends: 2092 [2021-08-06 14:07:44,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-08-06 14:07:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-08-06 14:07:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.700859291084855) internal successors, (5029), 1862 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-08-06 14:07:44,493 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-08-06 14:07:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:44,493 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-08-06 14:07:44,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-08-06 14:07:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:44,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:44,496 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 14:07:44,514 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 14:07:44,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:44,709 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 709154997, now seen corresponding path program 1 times [2021-08-06 14:07:44,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:44,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917299104] [2021-08-06 14:07:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:44,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:44,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:44,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917299104] [2021-08-06 14:07:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917299104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:44,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162454561] [2021-08-06 14:07:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:44,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:44,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:44,778 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 14:07:44,780 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 14:07:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:45,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162454561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:45,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:45,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:07:45,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488052589] [2021-08-06 14:07:45,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:07:45,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:07:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:45,186 INFO L87 Difference]: Start difference. First operand 1863 states and 5029 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:45,366 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-08-06 14:07:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:07:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:45,370 INFO L225 Difference]: With dead ends: 1530 [2021-08-06 14:07:45,370 INFO L226 Difference]: Without dead ends: 1391 [2021-08-06 14:07:45,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:07:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-08-06 14:07:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-08-06 14:07:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.7109144542772863) internal successors, (3676), 1356 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-08-06 14:07:45,390 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-08-06 14:07:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:45,391 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-08-06 14:07:45,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-08-06 14:07:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:45,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:45,393 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 14:07:45,426 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 14:07:45,626 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,SelfDestructingSolverStorable26 [2021-08-06 14:07:45,626 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:45,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:45,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1265080065, now seen corresponding path program 2 times [2021-08-06 14:07:45,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:45,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058995260] [2021-08-06 14:07:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:45,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:45,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:45,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058995260] [2021-08-06 14:07:45,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058995260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:45,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572090148] [2021-08-06 14:07:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:07:45,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:45,705 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 14:07:45,715 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 14:07:45,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:07:45,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:46,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572090148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:46,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:46,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:07:46,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934587395] [2021-08-06 14:07:46,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:07:46,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:46,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:07:46,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:46,136 INFO L87 Difference]: Start difference. First operand 1357 states and 3676 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:07:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:46,294 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-08-06 14:07:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:07:46,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 23 [2021-08-06 14:07:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:46,297 INFO L225 Difference]: With dead ends: 1538 [2021-08-06 14:07:46,297 INFO L226 Difference]: Without dead ends: 1538 [2021-08-06 14:07:46,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:07:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-08-06 14:07:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-08-06 14:07:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.703328509406657) internal successors, (3736), 1382 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-08-06 14:07:46,319 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-08-06 14:07:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:46,319 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-08-06 14:07:46,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:07:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-08-06 14:07:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:46,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:46,321 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:46,340 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 14:07:46,532 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,SelfDestructingSolverStorable27 [2021-08-06 14:07:46,533 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash 767996040, now seen corresponding path program 2 times [2021-08-06 14:07:46,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:46,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432485568] [2021-08-06 14:07:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:46,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:46,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:46,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432485568] [2021-08-06 14:07:46,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432485568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:46,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636278914] [2021-08-06 14:07:46,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:07:46,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:46,584 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 14:07:46,585 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 14:07:46,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:07:46,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:46,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:07:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:47,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636278914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:47,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:47,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-06 14:07:47,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065501222] [2021-08-06 14:07:47,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:07:47,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:07:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:47,053 INFO L87 Difference]: Start difference. First operand 1383 states and 3736 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:47,140 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-08-06 14:07:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:07:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:47,143 INFO L225 Difference]: With dead ends: 1546 [2021-08-06 14:07:47,143 INFO L226 Difference]: Without dead ends: 1526 [2021-08-06 14:07:47,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:07:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-08-06 14:07:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-08-06 14:07:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.6886657101865135) internal successors, (3748), 1394 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-08-06 14:07:47,162 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-08-06 14:07:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:47,162 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-08-06 14:07:47,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-08-06 14:07:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:47,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:47,164 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 14:07:47,182 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 14:07:47,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 14:07:47,381 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1930655477, now seen corresponding path program 3 times [2021-08-06 14:07:47,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:47,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650459225] [2021-08-06 14:07:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:47,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:07:47,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:47,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650459225] [2021-08-06 14:07:47,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650459225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:47,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916325183] [2021-08-06 14:07:47,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:07:47,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:47,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:47,445 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 14:07:47,446 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 14:07:47,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:07:47,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:47,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:47,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:47,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916325183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:47,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:47,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:07:47,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566373587] [2021-08-06 14:07:47,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:07:47,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:07:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:47,898 INFO L87 Difference]: Start difference. First operand 1395 states and 3748 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:48,091 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-08-06 14:07:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:07:48,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:48,095 INFO L225 Difference]: With dead ends: 1913 [2021-08-06 14:07:48,095 INFO L226 Difference]: Without dead ends: 1913 [2021-08-06 14:07:48,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:07:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-08-06 14:07:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-08-06 14:07:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.6824368114063515) internal successors, (4139), 1543 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-08-06 14:07:48,120 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-08-06 14:07:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:48,120 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-08-06 14:07:48,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-08-06 14:07:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:48,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:48,123 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 14:07:48,142 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 14:07:48,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:48,337 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash -863978827, now seen corresponding path program 3 times [2021-08-06 14:07:48,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:48,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860687057] [2021-08-06 14:07:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:48,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:07:48,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:48,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860687057] [2021-08-06 14:07:48,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860687057] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:07:48,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:07:48,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:07:48,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715755282] [2021-08-06 14:07:48,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:07:48,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:07:48,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:48,406 INFO L87 Difference]: Start difference. First operand 1544 states and 4139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:48,453 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-08-06 14:07:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:07:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:48,455 INFO L225 Difference]: With dead ends: 1492 [2021-08-06 14:07:48,456 INFO L226 Difference]: Without dead ends: 1411 [2021-08-06 14:07:48,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:07:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-08-06 14:07:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-08-06 14:07:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.6231884057971016) internal successors, (3620), 1380 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-08-06 14:07:48,516 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-08-06 14:07:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:48,516 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-08-06 14:07:48,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-08-06 14:07:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:48,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:48,519 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 14:07:48,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-06 14:07:48,519 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1477515007, now seen corresponding path program 4 times [2021-08-06 14:07:48,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:48,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23476510] [2021-08-06 14:07:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:48,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:07:48,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:48,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23476510] [2021-08-06 14:07:48,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23476510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:48,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346228789] [2021-08-06 14:07:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:07:48,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:48,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:48,582 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 14:07:48,589 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 14:07:48,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:07:48,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:48,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:49,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346228789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:49,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:49,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:07:49,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580219787] [2021-08-06 14:07:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:07:49,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:07:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:49,015 INFO L87 Difference]: Start difference. First operand 1381 states and 3620 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:49,204 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-08-06 14:07:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:07:49,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:49,208 INFO L225 Difference]: With dead ends: 1624 [2021-08-06 14:07:49,208 INFO L226 Difference]: Without dead ends: 1612 [2021-08-06 14:07:49,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:07:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-08-06 14:07:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-08-06 14:07:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.6203966005665724) internal successors, (3700), 1412 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-08-06 14:07:49,231 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-08-06 14:07:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:49,231 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-08-06 14:07:49,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-08-06 14:07:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:49,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:49,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:49,253 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 14:07:49,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:49,451 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1626597001, now seen corresponding path program 17 times [2021-08-06 14:07:49,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:49,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388570286] [2021-08-06 14:07:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:49,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:07:49,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:49,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388570286] [2021-08-06 14:07:49,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388570286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:49,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627405897] [2021-08-06 14:07:49,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:07:49,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:49,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:49,498 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 14:07:49,498 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 14:07:49,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:07:49,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:49,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:50,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627405897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:50,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:50,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-08-06 14:07:50,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058794705] [2021-08-06 14:07:50,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:07:50,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:07:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:07:50,052 INFO L87 Difference]: Start difference. First operand 1413 states and 3700 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:50,533 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-08-06 14:07:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:07:50,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:50,539 INFO L225 Difference]: With dead ends: 2940 [2021-08-06 14:07:50,539 INFO L226 Difference]: Without dead ends: 2926 [2021-08-06 14:07:50,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:07:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-06 14:07:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-08-06 14:07:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.618204804045512) internal successors, (4142), 1582 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-08-06 14:07:50,570 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-08-06 14:07:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:50,570 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-08-06 14:07:50,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-08-06 14:07:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:50,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:50,572 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 14:07:50,616 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 14:07:50,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 14:07:50,789 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash 664402327, now seen corresponding path program 5 times [2021-08-06 14:07:50,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:50,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011474366] [2021-08-06 14:07:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:50,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:50,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:50,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011474366] [2021-08-06 14:07:50,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011474366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:50,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917034694] [2021-08-06 14:07:50,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:07:50,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:50,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:50,837 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 14:07:50,838 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 14:07:51,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:07:51,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:51,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917034694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:51,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:51,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 14:07:51,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942581165] [2021-08-06 14:07:51,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:07:51,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:07:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:07:51,315 INFO L87 Difference]: Start difference. First operand 1583 states and 4142 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:51,585 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-08-06 14:07:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:07:51,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:51,588 INFO L225 Difference]: With dead ends: 1758 [2021-08-06 14:07:51,588 INFO L226 Difference]: Without dead ends: 1746 [2021-08-06 14:07:51,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:07:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-08-06 14:07:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-08-06 14:07:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.597493036211699) internal successors, (3730), 1436 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-08-06 14:07:51,607 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-08-06 14:07:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:51,607 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-08-06 14:07:51,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-08-06 14:07:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:07:51,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:51,608 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 14:07:51,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:07:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-06 14:07:51,821 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1869408663, now seen corresponding path program 4 times [2021-08-06 14:07:51,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:51,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811732749] [2021-08-06 14:07:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:51,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:51,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:51,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811732749] [2021-08-06 14:07:51,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811732749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:51,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655044896] [2021-08-06 14:07:51,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:07:51,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:51,901 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 14:07:51,940 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 14:07:52,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:07:52,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:07:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:52,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655044896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:52,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:52,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:07:52,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756334309] [2021-08-06 14:07:52,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:07:52,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:07:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:07:52,415 INFO L87 Difference]: Start difference. First operand 1437 states and 3730 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:52,512 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-08-06 14:07:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:07:52,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:07:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:52,514 INFO L225 Difference]: With dead ends: 1432 [2021-08-06 14:07:52,514 INFO L226 Difference]: Without dead ends: 1365 [2021-08-06 14:07:52,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:07:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-08-06 14:07:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-08-06 14:07:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.607380073800738) internal successors, (3533), 1355 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-08-06 14:07:52,530 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-08-06 14:07:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:52,530 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-08-06 14:07:52,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-08-06 14:07:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:52,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:52,532 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:52,549 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 14:07:52,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 14:07:52,742 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1790576731, now seen corresponding path program 18 times [2021-08-06 14:07:52,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:52,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029008585] [2021-08-06 14:07:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:52,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:52,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:52,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029008585] [2021-08-06 14:07:52,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029008585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:52,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631159302] [2021-08-06 14:07:52,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:07:52,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:52,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:52,825 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 14:07:52,840 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 14:07:53,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:07:53,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:53,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:53,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631159302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:53,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:53,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:07:53,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913953458] [2021-08-06 14:07:53,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:07:53,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:53,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:07:53,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:53,398 INFO L87 Difference]: Start difference. First operand 1356 states and 3533 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 14:07:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:53,555 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-08-06 14:07:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:07:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:07:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:53,557 INFO L225 Difference]: With dead ends: 1715 [2021-08-06 14:07:53,557 INFO L226 Difference]: Without dead ends: 1715 [2021-08-06 14:07:53,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:07:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-08-06 14:07:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-08-06 14:07:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.6129722024233786) internal successors, (3666), 1403 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-08-06 14:07:53,574 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-08-06 14:07:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-08-06 14:07:53,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 14:07:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-08-06 14:07:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:53,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:53,576 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:53,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 14:07:53,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:53,790 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:53,790 INFO L82 PathProgramCache]: Analyzing trace with hash 420088814, now seen corresponding path program 19 times [2021-08-06 14:07:53,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:53,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584955313] [2021-08-06 14:07:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:53,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:53,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:53,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584955313] [2021-08-06 14:07:53,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584955313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:53,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756285118] [2021-08-06 14:07:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:07:53,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:53,856 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 14:07:53,857 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 14:07:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:54,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:54,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756285118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:54,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:54,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-06 14:07:54,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820918686] [2021-08-06 14:07:54,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:07:54,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:07:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:54,407 INFO L87 Difference]: Start difference. First operand 1404 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 14:07:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:54,532 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-08-06 14:07:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:07:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:07:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:54,536 INFO L225 Difference]: With dead ends: 2473 [2021-08-06 14:07:54,536 INFO L226 Difference]: Without dead ends: 2455 [2021-08-06 14:07:54,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:07:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-08-06 14:07:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-08-06 14:07:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.707982151710461) internal successors, (5462), 2017 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-08-06 14:07:54,569 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-08-06 14:07:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:54,570 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-08-06 14:07:54,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 14:07:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-08-06 14:07:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:54,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:54,572 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:54,616 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 14:07:54,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 14:07:54,789 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash -537103826, now seen corresponding path program 20 times [2021-08-06 14:07:54,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:54,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171192134] [2021-08-06 14:07:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:54,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:54,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:54,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171192134] [2021-08-06 14:07:54,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171192134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:54,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986994543] [2021-08-06 14:07:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:07:54,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:54,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:54,848 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 14:07:54,849 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 14:07:55,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:07:55,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:55,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986994543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:55,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:55,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:07:55,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520543584] [2021-08-06 14:07:55,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:07:55,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:55,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:07:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:07:55,389 INFO L87 Difference]: Start difference. First operand 2018 states and 5462 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 14:07:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:55,514 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-08-06 14:07:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:07:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:07:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:55,518 INFO L225 Difference]: With dead ends: 2447 [2021-08-06 14:07:55,518 INFO L226 Difference]: Without dead ends: 2447 [2021-08-06 14:07:55,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:07:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-08-06 14:07:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-08-06 14:07:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.6905384213277577) internal successors, (5147), 1913 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-08-06 14:07:55,546 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-08-06 14:07:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:55,546 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-08-06 14:07:55,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 14:07:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-08-06 14:07:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:55,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:55,549 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:55,568 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 14:07:55,753 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,SelfDestructingSolverStorable37 [2021-08-06 14:07:55,753 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1468920273, now seen corresponding path program 21 times [2021-08-06 14:07:55,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:55,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980165446] [2021-08-06 14:07:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:55,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:55,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:55,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980165446] [2021-08-06 14:07:55,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980165446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:55,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189250779] [2021-08-06 14:07:55,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:07:55,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:55,814 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 14:07:55,815 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 14:07:56,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:07:56,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:56,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:56,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189250779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:56,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:56,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:07:56,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730871114] [2021-08-06 14:07:56,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:56,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:56,419 INFO L87 Difference]: Start difference. First operand 1914 states and 5147 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 14:07:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:56,505 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-08-06 14:07:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:07:56,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:07:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:56,508 INFO L225 Difference]: With dead ends: 2092 [2021-08-06 14:07:56,508 INFO L226 Difference]: Without dead ends: 2089 [2021-08-06 14:07:56,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-06 14:07:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-08-06 14:07:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.684931506849315) internal successors, (5096), 1898 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-08-06 14:07:56,534 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-08-06 14:07:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-08-06 14:07:56,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 14:07:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-08-06 14:07:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:56,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:56,536 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:56,555 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 14:07:56,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 14:07:56,755 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1453216515, now seen corresponding path program 22 times [2021-08-06 14:07:56,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:56,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732679108] [2021-08-06 14:07:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:56,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:56,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:56,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732679108] [2021-08-06 14:07:56,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732679108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:56,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157745302] [2021-08-06 14:07:56,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:07:56,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:56,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:56,823 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 14:07:56,824 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 14:07:57,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:07:57,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:57,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:57,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:07:57,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157745302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:57,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:57,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:07:57,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183304254] [2021-08-06 14:07:57,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:07:57,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:57,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:07:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:07:57,446 INFO L87 Difference]: Start difference. First operand 1899 states and 5096 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:57,568 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-08-06 14:07:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:07:57,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:07:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:57,572 INFO L225 Difference]: With dead ends: 2552 [2021-08-06 14:07:57,572 INFO L226 Difference]: Without dead ends: 2552 [2021-08-06 14:07:57,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:07:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-08-06 14:07:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-08-06 14:07:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.713534194165471) internal successors, (5674), 2091 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-08-06 14:07:57,603 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-08-06 14:07:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:57,603 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-08-06 14:07:57,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-08-06 14:07:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:57,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:57,606 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:57,626 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 14:07:57,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 14:07:57,817 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2030592720, now seen corresponding path program 23 times [2021-08-06 14:07:57,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:57,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535436823] [2021-08-06 14:07:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:57,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:57,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:57,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535436823] [2021-08-06 14:07:57,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535436823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:57,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091263054] [2021-08-06 14:07:57,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:07:57,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:57,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:57,867 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 14:07:57,868 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 14:07:58,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:07:58,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:58,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:58,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:07:58,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091263054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:58,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:58,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-06 14:07:58,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556448235] [2021-08-06 14:07:58,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:07:58,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:07:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:58,463 INFO L87 Difference]: Start difference. First operand 2092 states and 5674 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:07:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:58,578 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-08-06 14:07:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:07:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:07:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:58,584 INFO L225 Difference]: With dead ends: 3728 [2021-08-06 14:07:58,584 INFO L226 Difference]: Without dead ends: 3712 [2021-08-06 14:07:58,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:07:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-08-06 14:07:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-08-06 14:07:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.8134375) internal successors, (9003), 3200 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-08-06 14:07:58,645 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-08-06 14:07:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:58,645 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-08-06 14:07:58,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:07:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-08-06 14:07:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:58,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:58,649 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:58,669 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 14:07:58,864 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,SelfDestructingSolverStorable40 [2021-08-06 14:07:58,865 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1642494166, now seen corresponding path program 24 times [2021-08-06 14:07:58,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:58,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134413799] [2021-08-06 14:07:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:58,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:58,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:58,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134413799] [2021-08-06 14:07:58,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134413799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:58,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864539625] [2021-08-06 14:07:58,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:07:58,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:58,929 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 14:07:58,929 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 14:07:59,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:07:59,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:07:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:07:59,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:07:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:59,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864539625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:59,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:07:59,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-06 14:07:59,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814692442] [2021-08-06 14:07:59,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:07:59,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:07:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:07:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:07:59,500 INFO L87 Difference]: Start difference. First operand 3201 states and 9003 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:07:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:07:59,652 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-08-06 14:07:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:07:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:07:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:07:59,659 INFO L225 Difference]: With dead ends: 3830 [2021-08-06 14:07:59,659 INFO L226 Difference]: Without dead ends: 3830 [2021-08-06 14:07:59,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:07:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-08-06 14:07:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-08-06 14:07:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 2.805909797822706) internal successors, (9021), 3215 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:07:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-08-06 14:07:59,713 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-08-06 14:07:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:07:59,713 INFO L470 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-08-06 14:07:59,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:07:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-08-06 14:07:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:07:59,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:07:59,717 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:07:59,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 14:07:59,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:59,931 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:07:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:07:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 710677719, now seen corresponding path program 25 times [2021-08-06 14:07:59,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:07:59,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904222374] [2021-08-06 14:07:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:07:59,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:07:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:07:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:07:59,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:07:59,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904222374] [2021-08-06 14:07:59,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904222374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:07:59,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305564043] [2021-08-06 14:07:59,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:07:59,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:07:59,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:07:59,981 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 14:07:59,997 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 14:08:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:00,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:08:00,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305564043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:00,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:00,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:08:00,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343502233] [2021-08-06 14:08:00,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:00,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:00,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:00,644 INFO L87 Difference]: Start difference. First operand 3216 states and 9021 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:00,756 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-08-06 14:08:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:08:00,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:00,762 INFO L225 Difference]: With dead ends: 3629 [2021-08-06 14:08:00,762 INFO L226 Difference]: Without dead ends: 3617 [2021-08-06 14:08:00,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-08-06 14:08:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-08-06 14:08:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.7979207277452893) internal successors, (8612), 3078 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-08-06 14:08:00,805 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-08-06 14:08:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:00,806 INFO L470 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-08-06 14:08:00,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-08-06 14:08:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:00,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:00,809 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:00,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:01,027 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,SelfDestructingSolverStorable42 [2021-08-06 14:08:01,027 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash 4921710, now seen corresponding path program 26 times [2021-08-06 14:08:01,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:01,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314040584] [2021-08-06 14:08:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:01,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:01,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:01,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314040584] [2021-08-06 14:08:01,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314040584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:01,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073462957] [2021-08-06 14:08:01,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:01,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:01,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:01,096 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 14:08:01,097 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 14:08:01,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:01,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:01,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:01,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073462957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:01,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:01,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:08:01,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551934622] [2021-08-06 14:08:01,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:01,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:01,709 INFO L87 Difference]: Start difference. First operand 3079 states and 8612 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 14:08:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:01,879 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-08-06 14:08:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:08:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:01,887 INFO L225 Difference]: With dead ends: 4208 [2021-08-06 14:08:01,887 INFO L226 Difference]: Without dead ends: 4208 [2021-08-06 14:08:01,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:08:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-08-06 14:08:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-08-06 14:08:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.8185449358059915) internal successors, (9879), 3505 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-08-06 14:08:01,945 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-08-06 14:08:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:01,945 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-08-06 14:08:01,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 14:08:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-08-06 14:08:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:01,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:01,949 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:01,984 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 14:08:02,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:02,165 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash 917740285, now seen corresponding path program 27 times [2021-08-06 14:08:02,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:02,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666660529] [2021-08-06 14:08:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:02,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:02,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:02,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666660529] [2021-08-06 14:08:02,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666660529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:02,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864912284] [2021-08-06 14:08:02,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:08:02,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:02,237 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 14:08:02,252 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 14:08:02,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:08:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:02,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:02,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864912284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:02,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:02,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:08:02,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099162018] [2021-08-06 14:08:02,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:08:02,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:08:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:08:02,919 INFO L87 Difference]: Start difference. First operand 3506 states and 9879 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:03,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:03,040 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-08-06 14:08:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:03,055 INFO L225 Difference]: With dead ends: 3876 [2021-08-06 14:08:03,056 INFO L226 Difference]: Without dead ends: 3864 [2021-08-06 14:08:03,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-08-06 14:08:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-08-06 14:08:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.811401020986954) internal successors, (9913), 3526 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-08-06 14:08:03,106 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-08-06 14:08:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:03,106 INFO L470 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-08-06 14:08:03,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-08-06 14:08:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:03,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:03,109 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:03,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 14:08:03,311 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,SelfDestructingSolverStorable44 [2021-08-06 14:08:03,311 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1605831935, now seen corresponding path program 28 times [2021-08-06 14:08:03,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:03,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601878724] [2021-08-06 14:08:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:03,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:03,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:03,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601878724] [2021-08-06 14:08:03,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601878724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:03,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393252397] [2021-08-06 14:08:03,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:08:03,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:03,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:03,369 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 14:08:03,372 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 14:08:03,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:08:03,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:08:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393252397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:04,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:04,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:08:04,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061180730] [2021-08-06 14:08:04,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:08:04,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:08:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:04,132 INFO L87 Difference]: Start difference. First operand 3527 states and 9913 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:04,354 INFO L93 Difference]: Finished difference Result 4290 states and 11609 transitions. [2021-08-06 14:08:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:08:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:04,361 INFO L225 Difference]: With dead ends: 4290 [2021-08-06 14:08:04,361 INFO L226 Difference]: Without dead ends: 4290 [2021-08-06 14:08:04,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:08:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2021-08-06 14:08:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 3636. [2021-08-06 14:08:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.817881705639615) internal successors, (10243), 3635 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-08-06 14:08:04,419 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-08-06 14:08:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:04,419 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-08-06 14:08:04,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-08-06 14:08:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:04,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:04,423 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:04,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 14:08:04,623 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,SelfDestructingSolverStorable45 [2021-08-06 14:08:04,623 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -876334610, now seen corresponding path program 29 times [2021-08-06 14:08:04,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:04,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549327670] [2021-08-06 14:08:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:04,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:04,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:04,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549327670] [2021-08-06 14:08:04,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549327670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:04,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024362395] [2021-08-06 14:08:04,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:04,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:04,689 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 14:08:04,690 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 14:08:05,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:08:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:05,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024362395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:05,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:05,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:08:05,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761907415] [2021-08-06 14:08:05,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:08:05,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:08:05,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:05,418 INFO L87 Difference]: Start difference. First operand 3636 states and 10243 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:08:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:05,569 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-08-06 14:08:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:08:05,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:05,578 INFO L225 Difference]: With dead ends: 4890 [2021-08-06 14:08:05,578 INFO L226 Difference]: Without dead ends: 4858 [2021-08-06 14:08:05,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:08:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-08-06 14:08:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-08-06 14:08:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 2.8424010791366907) internal successors, (12643), 4448 states have internal predecessors, (12643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-08-06 14:08:05,643 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-08-06 14:08:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:05,644 INFO L470 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-08-06 14:08:05,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:08:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-08-06 14:08:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:05,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:05,647 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:05,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 14:08:05,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 14:08:05,847 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1917033433, now seen corresponding path program 30 times [2021-08-06 14:08:05,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:05,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604037213] [2021-08-06 14:08:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:05,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:05,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604037213] [2021-08-06 14:08:05,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604037213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093135391] [2021-08-06 14:08:05,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:05,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:05,911 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 14:08:05,911 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 14:08:06,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:08:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:06,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093135391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:06,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:06,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:08:06,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974847253] [2021-08-06 14:08:06,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:06,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:06,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:06,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:06,636 INFO L87 Difference]: Start difference. First operand 4449 states and 12643 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 14:08:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:06,758 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-08-06 14:08:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:08:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:06,770 INFO L225 Difference]: With dead ends: 5697 [2021-08-06 14:08:06,770 INFO L226 Difference]: Without dead ends: 5697 [2021-08-06 14:08:06,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-08-06 14:08:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-08-06 14:08:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.8657784847882284) internal successors, (14412), 5029 states have internal predecessors, (14412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-08-06 14:08:06,857 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-08-06 14:08:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:06,857 INFO L470 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-08-06 14:08:06,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 14:08:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-08-06 14:08:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:06,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:06,861 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:06,881 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 14:08:07,062 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,SelfDestructingSolverStorable47 [2021-08-06 14:08:07,062 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1339657228, now seen corresponding path program 31 times [2021-08-06 14:08:07,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:07,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730237577] [2021-08-06 14:08:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:07,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:07,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:07,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730237577] [2021-08-06 14:08:07,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730237577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:07,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591238285] [2021-08-06 14:08:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:07,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:07,133 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 14:08:07,141 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 14:08:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:07,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:07,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591238285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:07,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:07,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:08:07,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584729927] [2021-08-06 14:08:07,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:08:07,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:08:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:08:07,875 INFO L87 Difference]: Start difference. First operand 5030 states and 14412 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 14:08:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:08,013 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-08-06 14:08:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:08:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:08,024 INFO L225 Difference]: With dead ends: 6176 [2021-08-06 14:08:08,024 INFO L226 Difference]: Without dead ends: 6160 [2021-08-06 14:08:08,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-08-06 14:08:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-08-06 14:08:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.8816199376947043) internal successors, (16650), 5778 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-08-06 14:08:08,111 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-08-06 14:08:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:08,111 INFO L470 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-08-06 14:08:08,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 14:08:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-08-06 14:08:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:08,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:08,115 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:08,139 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 14:08:08,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 14:08:08,329 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 717776818, now seen corresponding path program 32 times [2021-08-06 14:08:08,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:08,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882801338] [2021-08-06 14:08:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:08,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:08,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:08,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882801338] [2021-08-06 14:08:08,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882801338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:08,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317817720] [2021-08-06 14:08:08,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:08,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:08,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:08,382 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 14:08:08,384 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 14:08:08,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:08,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:09,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317817720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:09,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:09,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:08:09,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043939386] [2021-08-06 14:08:09,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:08:09,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:08:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:08:09,122 INFO L87 Difference]: Start difference. First operand 5779 states and 16650 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 14:08:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:09,269 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-08-06 14:08:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:08:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:09,279 INFO L225 Difference]: With dead ends: 6311 [2021-08-06 14:08:09,280 INFO L226 Difference]: Without dead ends: 6311 [2021-08-06 14:08:09,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:08:09,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-08-06 14:08:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-08-06 14:08:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 2.8807592752372737) internal successors, (16694), 5795 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-08-06 14:08:09,362 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-08-06 14:08:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:09,362 INFO L470 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-08-06 14:08:09,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 14:08:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-08-06 14:08:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:09,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:09,365 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:09,383 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 14:08:09,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 14:08:09,566 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash -214039629, now seen corresponding path program 33 times [2021-08-06 14:08:09,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:09,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721058182] [2021-08-06 14:08:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:09,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:09,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:09,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721058182] [2021-08-06 14:08:09,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721058182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:09,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506023672] [2021-08-06 14:08:09,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:08:09,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:09,617 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 14:08:09,617 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 14:08:10,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:08:10,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:10,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:10,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:10,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506023672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:10,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:10,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:08:10,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485566881] [2021-08-06 14:08:10,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:10,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:10,411 INFO L87 Difference]: Start difference. First operand 5796 states and 16694 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 14:08:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:10,489 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-08-06 14:08:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:08:10,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:10,500 INFO L225 Difference]: With dead ends: 6492 [2021-08-06 14:08:10,501 INFO L226 Difference]: Without dead ends: 6489 [2021-08-06 14:08:10,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:08:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-08-06 14:08:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-08-06 14:08:10,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 2.8795305488436314) internal successors, (16684), 5794 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-08-06 14:08:10,591 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-08-06 14:08:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:10,591 INFO L470 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-08-06 14:08:10,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 14:08:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-08-06 14:08:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:10,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:10,595 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:10,613 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 14:08:10,812 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,SelfDestructingSolverStorable50 [2021-08-06 14:08:10,813 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash -919795638, now seen corresponding path program 34 times [2021-08-06 14:08:10,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:10,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677635126] [2021-08-06 14:08:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:10,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:10,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:10,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677635126] [2021-08-06 14:08:10,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677635126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:10,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017669039] [2021-08-06 14:08:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:08:10,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:10,871 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 14:08:10,888 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 14:08:11,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:08:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:11,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017669039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:11,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:11,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-06 14:08:11,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267199692] [2021-08-06 14:08:11,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:11,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:11,629 INFO L87 Difference]: Start difference. First operand 5795 states and 16684 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:08:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:11,838 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-08-06 14:08:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:08:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:11,852 INFO L225 Difference]: With dead ends: 6497 [2021-08-06 14:08:11,852 INFO L226 Difference]: Without dead ends: 6497 [2021-08-06 14:08:11,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:08:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-08-06 14:08:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-08-06 14:08:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.870848708487085) internal successors, (16338), 5691 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-08-06 14:08:11,954 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-08-06 14:08:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:11,954 INFO L470 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-08-06 14:08:11,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:08:11,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-08-06 14:08:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:11,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:11,958 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:11,977 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 14:08:12,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:12,177 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -6977063, now seen corresponding path program 35 times [2021-08-06 14:08:12,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:12,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032948739] [2021-08-06 14:08:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:12,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:12,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:12,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032948739] [2021-08-06 14:08:12,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032948739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:12,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281897398] [2021-08-06 14:08:12,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:12,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:12,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:12,231 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 14:08:12,232 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 14:08:12,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:08:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:12,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:12,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:13,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281897398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:13,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:13,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-06 14:08:13,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789601044] [2021-08-06 14:08:13,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:13,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:13,008 INFO L87 Difference]: Start difference. First operand 5692 states and 16338 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:13,157 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-08-06 14:08:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:08:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:13,173 INFO L225 Difference]: With dead ends: 8010 [2021-08-06 14:08:13,173 INFO L226 Difference]: Without dead ends: 7995 [2021-08-06 14:08:13,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:08:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-08-06 14:08:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-08-06 14:08:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.8919748965148884) internal successors, (21658), 7489 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-08-06 14:08:13,323 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-08-06 14:08:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:13,324 INFO L470 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-08-06 14:08:13,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-08-06 14:08:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:13,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:13,328 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:13,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:13,544 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,SelfDestructingSolverStorable52 [2021-08-06 14:08:13,545 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -573902674, now seen corresponding path program 36 times [2021-08-06 14:08:13,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:13,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092453358] [2021-08-06 14:08:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:13,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:13,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:13,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092453358] [2021-08-06 14:08:13,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092453358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:13,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681448142] [2021-08-06 14:08:13,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:13,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:13,617 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 14:08:13,618 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 14:08:14,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:08:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:14,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681448142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:14,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:14,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-06 14:08:14,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159453553] [2021-08-06 14:08:14,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:08:14,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:08:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:08:14,416 INFO L87 Difference]: Start difference. First operand 7490 states and 21658 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 14:08:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:14,682 INFO L93 Difference]: Finished difference Result 8607 states and 24438 transitions. [2021-08-06 14:08:14,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:08:14,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 14:08:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:14,699 INFO L225 Difference]: With dead ends: 8607 [2021-08-06 14:08:14,699 INFO L226 Difference]: Without dead ends: 8607 [2021-08-06 14:08:14,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:08:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8607 states. [2021-08-06 14:08:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8607 to 6930. [2021-08-06 14:08:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 2.893635445230192) internal successors, (20050), 6929 states have internal predecessors, (20050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 20050 transitions. [2021-08-06 14:08:14,827 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 20050 transitions. Word has length 26 [2021-08-06 14:08:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:14,828 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 20050 transitions. [2021-08-06 14:08:14,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 14:08:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 20050 transitions. [2021-08-06 14:08:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 14:08:14,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:14,832 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:14,850 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 14:08:15,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:15,037 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:15,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:15,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1605963187, now seen corresponding path program 37 times [2021-08-06 14:08:15,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:15,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395520536] [2021-08-06 14:08:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:15,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:15,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:15,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395520536] [2021-08-06 14:08:15,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395520536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:15,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910312032] [2021-08-06 14:08:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:15,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:15,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:15,095 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 14:08:15,096 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 14:08:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:08:15,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:15,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910312032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:15,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:15,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:08:15,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923362427] [2021-08-06 14:08:15,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:15,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:15,995 INFO L87 Difference]: Start difference. First operand 6930 states and 20050 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:08:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:16,116 INFO L93 Difference]: Finished difference Result 7602 states and 21466 transitions. [2021-08-06 14:08:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 14:08:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:16,130 INFO L225 Difference]: With dead ends: 7602 [2021-08-06 14:08:16,130 INFO L226 Difference]: Without dead ends: 7579 [2021-08-06 14:08:16,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:08:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7579 states. [2021-08-06 14:08:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7579 to 6963. [2021-08-06 14:08:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6962 states have (on average 2.8889686871588625) internal successors, (20113), 6962 states have internal predecessors, (20113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 20113 transitions. [2021-08-06 14:08:16,253 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 20113 transitions. Word has length 26 [2021-08-06 14:08:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:16,253 INFO L470 AbstractCegarLoop]: Abstraction has 6963 states and 20113 transitions. [2021-08-06 14:08:16,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 14:08:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 20113 transitions. [2021-08-06 14:08:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:16,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:16,258 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:16,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 14:08:16,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:16,473 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:16,473 INFO L82 PathProgramCache]: Analyzing trace with hash -726222136, now seen corresponding path program 5 times [2021-08-06 14:08:16,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:16,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189394782] [2021-08-06 14:08:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:16,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:16,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:16,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189394782] [2021-08-06 14:08:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189394782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:16,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250680310] [2021-08-06 14:08:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:16,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:16,533 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 14:08:16,555 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 14:08:17,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:08:17,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:17,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:17,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250680310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:17,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:17,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:08:17,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131398373] [2021-08-06 14:08:17,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:17,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:17,341 INFO L87 Difference]: Start difference. First operand 6963 states and 20113 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:17,574 INFO L93 Difference]: Finished difference Result 7475 states and 21037 transitions. [2021-08-06 14:08:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:08:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:17,587 INFO L225 Difference]: With dead ends: 7475 [2021-08-06 14:08:17,588 INFO L226 Difference]: Without dead ends: 7471 [2021-08-06 14:08:17,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:08:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2021-08-06 14:08:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 7059. [2021-08-06 14:08:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 7058 states have (on average 2.8620005667327857) internal successors, (20200), 7058 states have internal predecessors, (20200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 20200 transitions. [2021-08-06 14:08:17,699 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 20200 transitions. Word has length 29 [2021-08-06 14:08:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:17,699 INFO L470 AbstractCegarLoop]: Abstraction has 7059 states and 20200 transitions. [2021-08-06 14:08:17,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 20200 transitions. [2021-08-06 14:08:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:17,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:17,704 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:17,724 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 14:08:17,913 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,SelfDestructingSolverStorable55 [2021-08-06 14:08:17,913 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1247509848, now seen corresponding path program 38 times [2021-08-06 14:08:17,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:17,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610089216] [2021-08-06 14:08:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:17,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:17,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:17,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610089216] [2021-08-06 14:08:17,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610089216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:17,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024999684] [2021-08-06 14:08:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:17,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:17,963 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 14:08:17,977 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 14:08:18,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:18,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:08:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:18,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024999684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:18,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:18,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 14:08:18,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71271087] [2021-08-06 14:08:18,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:08:18,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:18,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:08:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:18,841 INFO L87 Difference]: Start difference. First operand 7059 states and 20200 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 14:08:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:18,960 INFO L93 Difference]: Finished difference Result 8152 states and 22970 transitions. [2021-08-06 14:08:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 14:08:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:18,976 INFO L225 Difference]: With dead ends: 8152 [2021-08-06 14:08:18,976 INFO L226 Difference]: Without dead ends: 8145 [2021-08-06 14:08:18,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-08-06 14:08:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7935. [2021-08-06 14:08:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7935 states, 7934 states have (on average 2.8453491303251828) internal successors, (22575), 7934 states have internal predecessors, (22575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7935 states to 7935 states and 22575 transitions. [2021-08-06 14:08:19,130 INFO L78 Accepts]: Start accepts. Automaton has 7935 states and 22575 transitions. Word has length 29 [2021-08-06 14:08:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:19,130 INFO L470 AbstractCegarLoop]: Abstraction has 7935 states and 22575 transitions. [2021-08-06 14:08:19,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 14:08:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7935 states and 22575 transitions. [2021-08-06 14:08:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:19,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:19,136 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:19,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:19,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 14:08:19,336 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 806035714, now seen corresponding path program 39 times [2021-08-06 14:08:19,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:19,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271348370] [2021-08-06 14:08:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:19,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:08:19,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:19,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271348370] [2021-08-06 14:08:19,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271348370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:19,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392498827] [2021-08-06 14:08:19,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:08:19,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:19,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:19,392 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 14:08:19,420 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 14:08:20,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:08:20,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:08:20,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392498827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:20,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:20,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-08-06 14:08:20,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886607303] [2021-08-06 14:08:20,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:08:20,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:20,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:08:20,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:08:20,541 INFO L87 Difference]: Start difference. First operand 7935 states and 22575 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:08:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:21,283 INFO L93 Difference]: Finished difference Result 18457 states and 50779 transitions. [2021-08-06 14:08:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:08:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 29 [2021-08-06 14:08:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:21,326 INFO L225 Difference]: With dead ends: 18457 [2021-08-06 14:08:21,326 INFO L226 Difference]: Without dead ends: 18374 [2021-08-06 14:08:21,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:08:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18374 states. [2021-08-06 14:08:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18374 to 11188. [2021-08-06 14:08:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11188 states, 11187 states have (on average 2.9059622776436935) internal successors, (32509), 11187 states have internal predecessors, (32509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11188 states to 11188 states and 32509 transitions. [2021-08-06 14:08:21,647 INFO L78 Accepts]: Start accepts. Automaton has 11188 states and 32509 transitions. Word has length 29 [2021-08-06 14:08:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:21,647 INFO L470 AbstractCegarLoop]: Abstraction has 11188 states and 32509 transitions. [2021-08-06 14:08:21,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:08:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 11188 states and 32509 transitions. [2021-08-06 14:08:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:21,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:21,684 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:21,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 14:08:21,885 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,SelfDestructingSolverStorable57 [2021-08-06 14:08:21,885 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1294668488, now seen corresponding path program 6 times [2021-08-06 14:08:21,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:21,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141921215] [2021-08-06 14:08:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:21,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:21,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:21,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141921215] [2021-08-06 14:08:21,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141921215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:21,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91144654] [2021-08-06 14:08:21,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:21,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:21,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:21,977 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 14:08:21,977 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 14:08:22,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:08:22,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:08:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:22,926 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 14:08:22,926 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 22 treesize of output 1 [2021-08-06 14:08:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:22,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91144654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:22,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:22,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:08:22,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145520396] [2021-08-06 14:08:22,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:08:22,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:08:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:22,951 INFO L87 Difference]: Start difference. First operand 11188 states and 32509 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:08:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:23,247 INFO L93 Difference]: Finished difference Result 7742 states and 21345 transitions. [2021-08-06 14:08:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:23,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 29 [2021-08-06 14:08:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:23,260 INFO L225 Difference]: With dead ends: 7742 [2021-08-06 14:08:23,260 INFO L226 Difference]: Without dead ends: 7597 [2021-08-06 14:08:23,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2021-08-06 14:08:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 4248. [2021-08-06 14:08:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.8704968212856135) internal successors, (12191), 4247 states have internal predecessors, (12191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12191 transitions. [2021-08-06 14:08:23,335 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12191 transitions. Word has length 29 [2021-08-06 14:08:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:23,335 INFO L470 AbstractCegarLoop]: Abstraction has 4248 states and 12191 transitions. [2021-08-06 14:08:23,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:08:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12191 transitions. [2021-08-06 14:08:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:23,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:23,339 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:23,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 14:08:23,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 14:08:23,539 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:23,539 INFO L82 PathProgramCache]: Analyzing trace with hash 850939720, now seen corresponding path program 7 times [2021-08-06 14:08:23,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:23,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567815492] [2021-08-06 14:08:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:23,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:23,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:23,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567815492] [2021-08-06 14:08:23,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567815492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:23,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074808116] [2021-08-06 14:08:23,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:23,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:23,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:23,641 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 14:08:23,643 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 14:08:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:24,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:24,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074808116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:24,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:24,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:08:24,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862580641] [2021-08-06 14:08:24,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:24,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:24,508 INFO L87 Difference]: Start difference. First operand 4248 states and 12191 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:24,595 INFO L93 Difference]: Finished difference Result 4352 states and 12414 transitions. [2021-08-06 14:08:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:24,602 INFO L225 Difference]: With dead ends: 4352 [2021-08-06 14:08:24,602 INFO L226 Difference]: Without dead ends: 4352 [2021-08-06 14:08:24,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-08-06 14:08:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 4274. [2021-08-06 14:08:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 4273 states have (on average 2.8673063421483733) internal successors, (12252), 4273 states have internal predecessors, (12252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 12252 transitions. [2021-08-06 14:08:24,664 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 12252 transitions. Word has length 29 [2021-08-06 14:08:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:24,665 INFO L470 AbstractCegarLoop]: Abstraction has 4274 states and 12252 transitions. [2021-08-06 14:08:24,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 12252 transitions. [2021-08-06 14:08:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:24,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:24,668 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:24,689 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 14:08:24,869 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,SelfDestructingSolverStorable59 [2021-08-06 14:08:24,869 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1992594714, now seen corresponding path program 6 times [2021-08-06 14:08:24,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:24,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326197963] [2021-08-06 14:08:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:24,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:08:24,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:24,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326197963] [2021-08-06 14:08:24,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326197963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:24,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889642204] [2021-08-06 14:08:24,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:24,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:24,951 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 14:08:24,951 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 14:08:25,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:08:25,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:08:25,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889642204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:25,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:25,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:08:25,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247632209] [2021-08-06 14:08:25,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:25,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:25,820 INFO L87 Difference]: Start difference. First operand 4274 states and 12252 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 14:08:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:25,939 INFO L93 Difference]: Finished difference Result 4713 states and 13141 transitions. [2021-08-06 14:08:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 14:08:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:25,947 INFO L225 Difference]: With dead ends: 4713 [2021-08-06 14:08:25,947 INFO L226 Difference]: Without dead ends: 4698 [2021-08-06 14:08:25,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-08-06 14:08:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4364. [2021-08-06 14:08:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 2.854457941783177) internal successors, (12454), 4363 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 12454 transitions. [2021-08-06 14:08:26,009 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 12454 transitions. Word has length 29 [2021-08-06 14:08:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:26,009 INFO L470 AbstractCegarLoop]: Abstraction has 4364 states and 12454 transitions. [2021-08-06 14:08:26,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 14:08:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 12454 transitions. [2021-08-06 14:08:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:26,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:26,012 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:26,031 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 14:08:26,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:26,213 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash -492261722, now seen corresponding path program 8 times [2021-08-06 14:08:26,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:26,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49367407] [2021-08-06 14:08:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:26,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:08:26,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:26,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49367407] [2021-08-06 14:08:26,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49367407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:26,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911277188] [2021-08-06 14:08:26,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:26,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:26,293 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 14:08:26,294 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 14:08:27,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:08:27,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911277188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:27,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:27,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:08:27,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511394082] [2021-08-06 14:08:27,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:27,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:27,194 INFO L87 Difference]: Start difference. First operand 4364 states and 12454 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 14:08:27,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:27,332 INFO L93 Difference]: Finished difference Result 4628 states and 12889 transitions. [2021-08-06 14:08:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:27,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 29 [2021-08-06 14:08:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:27,342 INFO L225 Difference]: With dead ends: 4628 [2021-08-06 14:08:27,342 INFO L226 Difference]: Without dead ends: 4544 [2021-08-06 14:08:27,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4544 states. [2021-08-06 14:08:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4544 to 4282. [2021-08-06 14:08:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 4281 states have (on average 2.8409250175192713) internal successors, (12162), 4281 states have internal predecessors, (12162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 12162 transitions. [2021-08-06 14:08:27,420 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 12162 transitions. Word has length 29 [2021-08-06 14:08:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:27,420 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 12162 transitions. [2021-08-06 14:08:27,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 14:08:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 12162 transitions. [2021-08-06 14:08:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:27,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:27,424 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:27,444 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 14:08:27,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:27,625 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1105797902, now seen corresponding path program 9 times [2021-08-06 14:08:27,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:27,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354926126] [2021-08-06 14:08:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:27,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:08:27,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:27,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354926126] [2021-08-06 14:08:27,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354926126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:27,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642770994] [2021-08-06 14:08:27,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:08:27,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:27,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:27,725 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 14:08:27,780 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 14:08:28,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:08:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:28,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:08:28,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642770994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:28,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:28,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:08:28,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065126604] [2021-08-06 14:08:28,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:28,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:28,759 INFO L87 Difference]: Start difference. First operand 4282 states and 12162 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:28,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:28,896 INFO L93 Difference]: Finished difference Result 4840 states and 13446 transitions. [2021-08-06 14:08:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:28,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:28,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:28,905 INFO L225 Difference]: With dead ends: 4840 [2021-08-06 14:08:28,905 INFO L226 Difference]: Without dead ends: 4828 [2021-08-06 14:08:28,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-08-06 14:08:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4562. [2021-08-06 14:08:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.8241613681210262) internal successors, (12881), 4561 states have internal predecessors, (12881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 12881 transitions. [2021-08-06 14:08:28,992 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 12881 transitions. Word has length 29 [2021-08-06 14:08:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:28,993 INFO L470 AbstractCegarLoop]: Abstraction has 4562 states and 12881 transitions. [2021-08-06 14:08:28,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 12881 transitions. [2021-08-06 14:08:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:28,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:28,996 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:29,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:29,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:29,209 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:29,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2014627176, now seen corresponding path program 40 times [2021-08-06 14:08:29,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:29,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815038957] [2021-08-06 14:08:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:29,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:08:29,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:29,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815038957] [2021-08-06 14:08:29,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815038957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:29,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249282464] [2021-08-06 14:08:29,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:08:29,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:29,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:29,269 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 14:08:29,270 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 14:08:30,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:08:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:08:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:08:30,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249282464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:30,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:30,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 14:08:30,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681912452] [2021-08-06 14:08:30,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:08:30,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:08:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:30,298 INFO L87 Difference]: Start difference. First operand 4562 states and 12881 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:30,423 INFO L93 Difference]: Finished difference Result 5800 states and 16283 transitions. [2021-08-06 14:08:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:30,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:30,435 INFO L225 Difference]: With dead ends: 5800 [2021-08-06 14:08:30,436 INFO L226 Difference]: Without dead ends: 5787 [2021-08-06 14:08:30,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2021-08-06 14:08:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 5472. [2021-08-06 14:08:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5472 states, 5471 states have (on average 2.854322792908061) internal successors, (15616), 5471 states have internal predecessors, (15616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5472 states to 5472 states and 15616 transitions. [2021-08-06 14:08:30,537 INFO L78 Accepts]: Start accepts. Automaton has 5472 states and 15616 transitions. Word has length 29 [2021-08-06 14:08:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 5472 states and 15616 transitions. [2021-08-06 14:08:30,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5472 states and 15616 transitions. [2021-08-06 14:08:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:30,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:30,542 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:30,562 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 14:08:30,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:30,743 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:30,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:30,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1036119432, now seen corresponding path program 10 times [2021-08-06 14:08:30,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:30,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947033853] [2021-08-06 14:08:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:30,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:30,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:30,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947033853] [2021-08-06 14:08:30,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947033853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:30,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377798662] [2021-08-06 14:08:30,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:08:30,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:30,824 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 14:08:30,825 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 14:08:31,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:08:31,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:31,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:08:31,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:31,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:08:31,858 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 14:08:31,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:08:31,861 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-06 14:08:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:31,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377798662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:31,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:31,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:08:31,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410632988] [2021-08-06 14:08:31,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:08:31,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:31,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:08:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:31,896 INFO L87 Difference]: Start difference. First operand 5472 states and 15616 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:32,212 INFO L93 Difference]: Finished difference Result 9453 states and 26211 transitions. [2021-08-06 14:08:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:08:32,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:32,233 INFO L225 Difference]: With dead ends: 9453 [2021-08-06 14:08:32,233 INFO L226 Difference]: Without dead ends: 9426 [2021-08-06 14:08:32,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:08:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9426 states. [2021-08-06 14:08:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9426 to 8349. [2021-08-06 14:08:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 8348 states have (on average 2.843675131768088) internal successors, (23739), 8348 states have internal predecessors, (23739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 23739 transitions. [2021-08-06 14:08:32,495 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 23739 transitions. Word has length 29 [2021-08-06 14:08:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:32,495 INFO L470 AbstractCegarLoop]: Abstraction has 8349 states and 23739 transitions. [2021-08-06 14:08:32,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 23739 transitions. [2021-08-06 14:08:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:32,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:32,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:32,520 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 14:08:32,701 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,SelfDestructingSolverStorable64 [2021-08-06 14:08:32,702 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:32,702 INFO L82 PathProgramCache]: Analyzing trace with hash -188205470, now seen corresponding path program 7 times [2021-08-06 14:08:32,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:32,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137693809] [2021-08-06 14:08:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:32,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:32,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:32,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137693809] [2021-08-06 14:08:32,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137693809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:32,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539513001] [2021-08-06 14:08:32,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:32,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:32,797 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 14:08:32,852 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 14:08:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:08:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:33,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:08:33,959 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 14:08:33,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:08:33,962 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-06 14:08:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:33,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539513001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:33,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:33,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:08:33,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446334752] [2021-08-06 14:08:33,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:08:33,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:08:33,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:33,989 INFO L87 Difference]: Start difference. First operand 8349 states and 23739 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:34,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:34,266 INFO L93 Difference]: Finished difference Result 9430 states and 26142 transitions. [2021-08-06 14:08:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:08:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:34,285 INFO L225 Difference]: With dead ends: 9430 [2021-08-06 14:08:34,285 INFO L226 Difference]: Without dead ends: 9399 [2021-08-06 14:08:34,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:08:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9399 states. [2021-08-06 14:08:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9399 to 8709. [2021-08-06 14:08:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8709 states, 8708 states have (on average 2.833256775378962) internal successors, (24672), 8708 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8709 states to 8709 states and 24672 transitions. [2021-08-06 14:08:34,488 INFO L78 Accepts]: Start accepts. Automaton has 8709 states and 24672 transitions. Word has length 29 [2021-08-06 14:08:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:34,488 INFO L470 AbstractCegarLoop]: Abstraction has 8709 states and 24672 transitions. [2021-08-06 14:08:34,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 8709 states and 24672 transitions. [2021-08-06 14:08:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:34,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:34,493 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:34,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 14:08:34,693 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,SelfDestructingSolverStorable65 [2021-08-06 14:08:34,693 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1821501854, now seen corresponding path program 11 times [2021-08-06 14:08:34,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:34,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699860421] [2021-08-06 14:08:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:34,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:34,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:34,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699860421] [2021-08-06 14:08:34,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699860421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:34,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178150506] [2021-08-06 14:08:34,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:34,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:34,809 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 14:08:34,864 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 14:08:35,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:08:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:35,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:36,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178150506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:36,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:36,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:08:36,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591901983] [2021-08-06 14:08:36,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:36,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:36,063 INFO L87 Difference]: Start difference. First operand 8709 states and 24672 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 14:08:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:36,230 INFO L93 Difference]: Finished difference Result 8594 states and 24281 transitions. [2021-08-06 14:08:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:08:36,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 29 [2021-08-06 14:08:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:36,248 INFO L225 Difference]: With dead ends: 8594 [2021-08-06 14:08:36,249 INFO L226 Difference]: Without dead ends: 8560 [2021-08-06 14:08:36,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8560 states. [2021-08-06 14:08:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8560 to 8306. [2021-08-06 14:08:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8306 states, 8305 states have (on average 2.8570740517760385) internal successors, (23728), 8305 states have internal predecessors, (23728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8306 states to 8306 states and 23728 transitions. [2021-08-06 14:08:36,404 INFO L78 Accepts]: Start accepts. Automaton has 8306 states and 23728 transitions. Word has length 29 [2021-08-06 14:08:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:36,405 INFO L470 AbstractCegarLoop]: Abstraction has 8306 states and 23728 transitions. [2021-08-06 14:08:36,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 14:08:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 8306 states and 23728 transitions. [2021-08-06 14:08:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:36,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:36,433 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:36,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 14:08:36,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 14:08:36,634 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1968094858, now seen corresponding path program 8 times [2021-08-06 14:08:36,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:36,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635942843] [2021-08-06 14:08:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:36,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:36,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:36,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635942843] [2021-08-06 14:08:36,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635942843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:36,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201772469] [2021-08-06 14:08:36,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:36,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:36,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:36,713 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 14:08:36,723 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 14:08:37,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:37,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201772469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:37,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:37,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:08:37,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511200936] [2021-08-06 14:08:37,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:37,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:37,787 INFO L87 Difference]: Start difference. First operand 8306 states and 23728 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:37,945 INFO L93 Difference]: Finished difference Result 8693 states and 24496 transitions. [2021-08-06 14:08:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:37,964 INFO L225 Difference]: With dead ends: 8693 [2021-08-06 14:08:37,965 INFO L226 Difference]: Without dead ends: 8685 [2021-08-06 14:08:37,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2021-08-06 14:08:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8359. [2021-08-06 14:08:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8359 states, 8358 states have (on average 2.851519502273271) internal successors, (23833), 8358 states have internal predecessors, (23833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8359 states to 8359 states and 23833 transitions. [2021-08-06 14:08:38,124 INFO L78 Accepts]: Start accepts. Automaton has 8359 states and 23833 transitions. Word has length 29 [2021-08-06 14:08:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:38,124 INFO L470 AbstractCegarLoop]: Abstraction has 8359 states and 23833 transitions. [2021-08-06 14:08:38,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 8359 states and 23833 transitions. [2021-08-06 14:08:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:38,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:38,129 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:38,148 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 14:08:38,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:38,330 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:38,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:38,330 INFO L82 PathProgramCache]: Analyzing trace with hash -826539446, now seen corresponding path program 12 times [2021-08-06 14:08:38,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:38,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894436886] [2021-08-06 14:08:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:38,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:38,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:38,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894436886] [2021-08-06 14:08:38,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894436886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:38,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517141975] [2021-08-06 14:08:38,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:38,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:38,416 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 14:08:38,417 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 14:08:39,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:08:39,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:08:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:39,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517141975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:39,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:39,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:08:39,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528069278] [2021-08-06 14:08:39,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:39,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:39,535 INFO L87 Difference]: Start difference. First operand 8359 states and 23833 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 14:08:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:39,707 INFO L93 Difference]: Finished difference Result 7859 states and 21966 transitions. [2021-08-06 14:08:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 29 [2021-08-06 14:08:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:39,726 INFO L225 Difference]: With dead ends: 7859 [2021-08-06 14:08:39,726 INFO L226 Difference]: Without dead ends: 7738 [2021-08-06 14:08:39,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-08-06 14:08:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7313. [2021-08-06 14:08:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7313 states, 7312 states have (on average 2.8414934354485775) internal successors, (20777), 7312 states have internal predecessors, (20777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7313 states to 7313 states and 20777 transitions. [2021-08-06 14:08:39,876 INFO L78 Accepts]: Start accepts. Automaton has 7313 states and 20777 transitions. Word has length 29 [2021-08-06 14:08:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:39,876 INFO L470 AbstractCegarLoop]: Abstraction has 7313 states and 20777 transitions. [2021-08-06 14:08:39,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 14:08:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 7313 states and 20777 transitions. [2021-08-06 14:08:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:39,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:39,880 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:39,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 14:08:40,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:40,091 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1835185986, now seen corresponding path program 41 times [2021-08-06 14:08:40,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:40,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392366029] [2021-08-06 14:08:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:40,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:40,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:40,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392366029] [2021-08-06 14:08:40,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392366029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:40,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861885517] [2021-08-06 14:08:40,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:40,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:40,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:40,159 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 14:08:40,188 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 14:08:41,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:08:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:08:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:08:41,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861885517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:41,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:41,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 14:08:41,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521333968] [2021-08-06 14:08:41,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:08:41,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:08:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:41,323 INFO L87 Difference]: Start difference. First operand 7313 states and 20777 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 14:08:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:41,456 INFO L93 Difference]: Finished difference Result 9281 states and 26419 transitions. [2021-08-06 14:08:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 14:08:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:41,478 INFO L225 Difference]: With dead ends: 9281 [2021-08-06 14:08:41,478 INFO L226 Difference]: Without dead ends: 9268 [2021-08-06 14:08:41,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-08-06 14:08:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 8989. [2021-08-06 14:08:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8989 states, 8988 states have (on average 2.875611927013796) internal successors, (25846), 8988 states have internal predecessors, (25846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8989 states to 8989 states and 25846 transitions. [2021-08-06 14:08:41,649 INFO L78 Accepts]: Start accepts. Automaton has 8989 states and 25846 transitions. Word has length 29 [2021-08-06 14:08:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:41,649 INFO L470 AbstractCegarLoop]: Abstraction has 8989 states and 25846 transitions. [2021-08-06 14:08:41,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 14:08:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 8989 states and 25846 transitions. [2021-08-06 14:08:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:08:41,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:41,654 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:41,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 14:08:41,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 14:08:41,854 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:41,855 INFO L82 PathProgramCache]: Analyzing trace with hash 856678242, now seen corresponding path program 13 times [2021-08-06 14:08:41,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:41,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597961004] [2021-08-06 14:08:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:41,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:41,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:41,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597961004] [2021-08-06 14:08:41,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597961004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:41,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032246469] [2021-08-06 14:08:41,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:41,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:41,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:41,927 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 14:08:41,979 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 14:08:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:43,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032246469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:43,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:43,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:08:43,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135867494] [2021-08-06 14:08:43,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:43,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:43,067 INFO L87 Difference]: Start difference. First operand 8989 states and 25846 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:43,251 INFO L93 Difference]: Finished difference Result 7671 states and 21813 transitions. [2021-08-06 14:08:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:08:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:08:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:43,266 INFO L225 Difference]: With dead ends: 7671 [2021-08-06 14:08:43,266 INFO L226 Difference]: Without dead ends: 7617 [2021-08-06 14:08:43,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:08:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7617 states. [2021-08-06 14:08:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7617 to 7264. [2021-08-06 14:08:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7264 states, 7263 states have (on average 2.87870026159989) internal successors, (20908), 7263 states have internal predecessors, (20908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7264 states to 7264 states and 20908 transitions. [2021-08-06 14:08:43,383 INFO L78 Accepts]: Start accepts. Automaton has 7264 states and 20908 transitions. Word has length 29 [2021-08-06 14:08:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:43,383 INFO L470 AbstractCegarLoop]: Abstraction has 7264 states and 20908 transitions. [2021-08-06 14:08:43,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7264 states and 20908 transitions. [2021-08-06 14:08:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:43,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:43,387 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:43,412 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 14:08:43,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:43,588 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash -792536658, now seen corresponding path program 42 times [2021-08-06 14:08:43,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:43,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470795653] [2021-08-06 14:08:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:43,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:43,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:43,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470795653] [2021-08-06 14:08:43,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470795653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:43,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468717817] [2021-08-06 14:08:43,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:43,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:43,689 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 14:08:43,690 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 14:08:44,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:08:44,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:44,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468717817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:44,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:44,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:08:44,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285641234] [2021-08-06 14:08:44,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:08:44,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:08:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:44,971 INFO L87 Difference]: Start difference. First operand 7264 states and 20908 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:45,270 INFO L93 Difference]: Finished difference Result 7795 states and 21950 transitions. [2021-08-06 14:08:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:08:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:08:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:45,289 INFO L225 Difference]: With dead ends: 7795 [2021-08-06 14:08:45,289 INFO L226 Difference]: Without dead ends: 7795 [2021-08-06 14:08:45,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:08:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7795 states. [2021-08-06 14:08:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7795 to 7230. [2021-08-06 14:08:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 2.8781297551528566) internal successors, (20806), 7229 states have internal predecessors, (20806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 20806 transitions. [2021-08-06 14:08:45,443 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 20806 transitions. Word has length 32 [2021-08-06 14:08:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:45,443 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 20806 transitions. [2021-08-06 14:08:45,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 20806 transitions. [2021-08-06 14:08:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:45,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:45,449 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:45,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 14:08:45,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:45,665 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1038956229, now seen corresponding path program 43 times [2021-08-06 14:08:45,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:45,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61997164] [2021-08-06 14:08:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:45,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:45,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:45,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61997164] [2021-08-06 14:08:45,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61997164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:45,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695337886] [2021-08-06 14:08:45,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:45,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:45,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:45,752 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 14:08:45,752 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 14:08:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:46,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695337886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:46,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:46,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 14:08:46,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617074793] [2021-08-06 14:08:46,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:08:46,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:46,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:08:46,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:46,996 INFO L87 Difference]: Start difference. First operand 7230 states and 20806 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:47,171 INFO L93 Difference]: Finished difference Result 9791 states and 27150 transitions. [2021-08-06 14:08:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:08:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:08:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:47,225 INFO L225 Difference]: With dead ends: 9791 [2021-08-06 14:08:47,225 INFO L226 Difference]: Without dead ends: 9767 [2021-08-06 14:08:47,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:08:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-08-06 14:08:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 8255. [2021-08-06 14:08:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8255 states, 8254 states have (on average 2.8838139084080447) internal successors, (23803), 8254 states have internal predecessors, (23803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8255 states to 8255 states and 23803 transitions. [2021-08-06 14:08:47,366 INFO L78 Accepts]: Start accepts. Automaton has 8255 states and 23803 transitions. Word has length 32 [2021-08-06 14:08:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:47,367 INFO L470 AbstractCegarLoop]: Abstraction has 8255 states and 23803 transitions. [2021-08-06 14:08:47,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8255 states and 23803 transitions. [2021-08-06 14:08:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:47,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:47,372 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:47,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 14:08:47,572 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,SelfDestructingSolverStorable72 [2021-08-06 14:08:47,572 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:47,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1188862303, now seen corresponding path program 44 times [2021-08-06 14:08:47,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:47,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257738672] [2021-08-06 14:08:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:47,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:47,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:47,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257738672] [2021-08-06 14:08:47,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257738672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:47,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648732693] [2021-08-06 14:08:47,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:47,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:47,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:47,643 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 14:08:47,643 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 14:08:48,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:48,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:48,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:48,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:48,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648732693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:48,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:48,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:08:48,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57211607] [2021-08-06 14:08:48,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:48,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:48,859 INFO L87 Difference]: Start difference. First operand 8255 states and 23803 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:49,066 INFO L93 Difference]: Finished difference Result 9757 states and 27018 transitions. [2021-08-06 14:08:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:08:49,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:08:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:49,086 INFO L225 Difference]: With dead ends: 9757 [2021-08-06 14:08:49,086 INFO L226 Difference]: Without dead ends: 9757 [2021-08-06 14:08:49,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:08:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-08-06 14:08:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 8079. [2021-08-06 14:08:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 2.877940084179252) internal successors, (23248), 8078 states have internal predecessors, (23248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 23248 transitions. [2021-08-06 14:08:49,289 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 23248 transitions. Word has length 32 [2021-08-06 14:08:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:49,289 INFO L470 AbstractCegarLoop]: Abstraction has 8079 states and 23248 transitions. [2021-08-06 14:08:49,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 23248 transitions. [2021-08-06 14:08:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:49,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:49,295 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:49,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 14:08:49,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:49,495 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:49,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2120678750, now seen corresponding path program 45 times [2021-08-06 14:08:49,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:49,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870362253] [2021-08-06 14:08:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:49,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:49,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:49,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870362253] [2021-08-06 14:08:49,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870362253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:49,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024894954] [2021-08-06 14:08:49,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:08:49,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:49,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:49,585 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 14:08:49,637 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 14:08:50,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:08:50,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:50,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:50,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-06 14:08:51,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024894954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:51,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:51,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:08:51,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058342838] [2021-08-06 14:08:51,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:08:51,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:08:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:08:51,070 INFO L87 Difference]: Start difference. First operand 8079 states and 23248 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:51,574 INFO L93 Difference]: Finished difference Result 9017 states and 25037 transitions. [2021-08-06 14:08:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:08:51,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:08:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:51,591 INFO L225 Difference]: With dead ends: 9017 [2021-08-06 14:08:51,591 INFO L226 Difference]: Without dead ends: 8974 [2021-08-06 14:08:51,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:08:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-08-06 14:08:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8285. [2021-08-06 14:08:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8285 states, 8284 states have (on average 2.8491067117334623) internal successors, (23602), 8284 states have internal predecessors, (23602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8285 states to 8285 states and 23602 transitions. [2021-08-06 14:08:51,729 INFO L78 Accepts]: Start accepts. Automaton has 8285 states and 23602 transitions. Word has length 32 [2021-08-06 14:08:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:51,729 INFO L470 AbstractCegarLoop]: Abstraction has 8285 states and 23602 transitions. [2021-08-06 14:08:51,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 8285 states and 23602 transitions. [2021-08-06 14:08:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:51,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:51,734 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:51,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 14:08:51,935 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,SelfDestructingSolverStorable74 [2021-08-06 14:08:51,935 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2101483961, now seen corresponding path program 46 times [2021-08-06 14:08:51,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:51,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594390322] [2021-08-06 14:08:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:51,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:52,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:52,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594390322] [2021-08-06 14:08:52,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594390322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:52,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951052376] [2021-08-06 14:08:52,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:08:52,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:52,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:52,020 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 14:08:52,022 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 14:08:53,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:08:53,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:53,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:53,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951052376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:53,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:53,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 14:08:53,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672683619] [2021-08-06 14:08:53,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:08:53,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:08:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:53,314 INFO L87 Difference]: Start difference. First operand 8285 states and 23602 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:53,594 INFO L93 Difference]: Finished difference Result 14005 states and 38761 transitions. [2021-08-06 14:08:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:08:53,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:08:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:53,627 INFO L225 Difference]: With dead ends: 14005 [2021-08-06 14:08:53,627 INFO L226 Difference]: Without dead ends: 14005 [2021-08-06 14:08:53,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:08:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14005 states. [2021-08-06 14:08:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14005 to 11430. [2021-08-06 14:08:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11430 states, 11429 states have (on average 2.8950914340712224) internal successors, (33088), 11429 states have internal predecessors, (33088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11430 states to 11430 states and 33088 transitions. [2021-08-06 14:08:53,885 INFO L78 Accepts]: Start accepts. Automaton has 11430 states and 33088 transitions. Word has length 32 [2021-08-06 14:08:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:53,886 INFO L470 AbstractCegarLoop]: Abstraction has 11430 states and 33088 transitions. [2021-08-06 14:08:53,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11430 states and 33088 transitions. [2021-08-06 14:08:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:53,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:53,891 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:53,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 14:08:54,092 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,SelfDestructingSolverStorable75 [2021-08-06 14:08:54,092 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2004808120, now seen corresponding path program 47 times [2021-08-06 14:08:54,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:54,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218441914] [2021-08-06 14:08:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:54,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:54,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:54,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218441914] [2021-08-06 14:08:54,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218441914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:54,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308764820] [2021-08-06 14:08:54,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:54,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:54,181 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 14:08:54,211 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 14:08:55,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:08:55,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:55,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308764820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:55,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:55,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:08:55,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989827063] [2021-08-06 14:08:55,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:08:55,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:55,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:08:55,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:55,545 INFO L87 Difference]: Start difference. First operand 11430 states and 33088 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:55,781 INFO L93 Difference]: Finished difference Result 12548 states and 35366 transitions. [2021-08-06 14:08:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:08:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:08:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:55,818 INFO L225 Difference]: With dead ends: 12548 [2021-08-06 14:08:55,819 INFO L226 Difference]: Without dead ends: 12548 [2021-08-06 14:08:55,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:08:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12548 states. [2021-08-06 14:08:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12548 to 11416. [2021-08-06 14:08:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11416 states, 11415 states have (on average 2.8823477879982478) internal successors, (32902), 11415 states have internal predecessors, (32902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11416 states to 11416 states and 32902 transitions. [2021-08-06 14:08:56,080 INFO L78 Accepts]: Start accepts. Automaton has 11416 states and 32902 transitions. Word has length 32 [2021-08-06 14:08:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:56,080 INFO L470 AbstractCegarLoop]: Abstraction has 11416 states and 32902 transitions. [2021-08-06 14:08:56,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 11416 states and 32902 transitions. [2021-08-06 14:08:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:56,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:56,086 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:56,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 14:08:56,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:56,287 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:56,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1556724101, now seen corresponding path program 48 times [2021-08-06 14:08:56,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:56,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836768062] [2021-08-06 14:08:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:56,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:56,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:56,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836768062] [2021-08-06 14:08:56,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836768062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:56,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038031805] [2021-08-06 14:08:56,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:56,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:56,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:56,361 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 14:08:56,362 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 14:08:57,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:08:57,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:57,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:57,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038031805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:57,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:57,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:08:57,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536973944] [2021-08-06 14:08:57,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:57,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:57,719 INFO L87 Difference]: Start difference. First operand 11416 states and 32902 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:57,937 INFO L93 Difference]: Finished difference Result 17939 states and 50452 transitions. [2021-08-06 14:08:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:08:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:08:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:57,987 INFO L225 Difference]: With dead ends: 17939 [2021-08-06 14:08:57,987 INFO L226 Difference]: Without dead ends: 17907 [2021-08-06 14:08:57,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:08:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17907 states. [2021-08-06 14:08:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17907 to 14989. [2021-08-06 14:08:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14989 states, 14988 states have (on average 2.9194689084601015) internal successors, (43757), 14988 states have internal predecessors, (43757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14989 states to 14989 states and 43757 transitions. [2021-08-06 14:08:58,347 INFO L78 Accepts]: Start accepts. Automaton has 14989 states and 43757 transitions. Word has length 32 [2021-08-06 14:08:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:58,347 INFO L470 AbstractCegarLoop]: Abstraction has 14989 states and 43757 transitions. [2021-08-06 14:08:58,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 14989 states and 43757 transitions. [2021-08-06 14:08:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:08:58,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:58,354 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:58,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 14:08:58,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:58,555 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:08:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2116362785, now seen corresponding path program 49 times [2021-08-06 14:08:58,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:58,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254560861] [2021-08-06 14:08:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:58,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:58,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:58,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254560861] [2021-08-06 14:08:58,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254560861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:58,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988638872] [2021-08-06 14:08:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:58,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:58,636 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 14:08:58,637 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 14:08:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:08:59,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:00,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988638872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:00,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:00,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:09:00,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265775762] [2021-08-06 14:09:00,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:09:00,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:09:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:00,050 INFO L87 Difference]: Start difference. First operand 14989 states and 43757 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:00,300 INFO L93 Difference]: Finished difference Result 18393 states and 51276 transitions. [2021-08-06 14:09:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:09:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:00,345 INFO L225 Difference]: With dead ends: 18393 [2021-08-06 14:09:00,345 INFO L226 Difference]: Without dead ends: 18390 [2021-08-06 14:09:00,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:09:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18390 states. [2021-08-06 14:09:00,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18390 to 14441. [2021-08-06 14:09:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14441 states, 14440 states have (on average 2.903531855955679) internal successors, (41927), 14440 states have internal predecessors, (41927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14441 states to 14441 states and 41927 transitions. [2021-08-06 14:09:00,701 INFO L78 Accepts]: Start accepts. Automaton has 14441 states and 41927 transitions. Word has length 32 [2021-08-06 14:09:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:00,701 INFO L470 AbstractCegarLoop]: Abstraction has 14441 states and 41927 transitions. [2021-08-06 14:09:00,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 14441 states and 41927 transitions. [2021-08-06 14:09:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:09:00,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:00,707 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:00,726 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 14:09:00,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 14:09:00,908 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:00,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash 478790329, now seen corresponding path program 50 times [2021-08-06 14:09:00,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:00,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887278595] [2021-08-06 14:09:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:00,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:00,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:00,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887278595] [2021-08-06 14:09:00,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887278595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:00,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838471440] [2021-08-06 14:09:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:00,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:01,009 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 14:09:01,024 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 14:09:02,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:02,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:02,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:09:02,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:02,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838471440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:02,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:02,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 14:09:02,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662919064] [2021-08-06 14:09:02,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:02,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:02,412 INFO L87 Difference]: Start difference. First operand 14441 states and 41927 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:02,683 INFO L93 Difference]: Finished difference Result 17852 states and 49436 transitions. [2021-08-06 14:09:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:09:02,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:09:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:02,726 INFO L225 Difference]: With dead ends: 17852 [2021-08-06 14:09:02,726 INFO L226 Difference]: Without dead ends: 17849 [2021-08-06 14:09:02,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:09:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17849 states. [2021-08-06 14:09:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17849 to 14322. [2021-08-06 14:09:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14322 states, 14321 states have (on average 2.8967949165561064) internal successors, (41485), 14321 states have internal predecessors, (41485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 41485 transitions. [2021-08-06 14:09:03,106 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 41485 transitions. Word has length 32 [2021-08-06 14:09:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:03,106 INFO L470 AbstractCegarLoop]: Abstraction has 14322 states and 41485 transitions. [2021-08-06 14:09:03,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 41485 transitions. [2021-08-06 14:09:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 14:09:03,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:03,113 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:03,132 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 14:09:03,313 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,SelfDestructingSolverStorable79 [2021-08-06 14:09:03,313 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 824683293, now seen corresponding path program 51 times [2021-08-06 14:09:03,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:03,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239401512] [2021-08-06 14:09:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:03,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:03,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239401512] [2021-08-06 14:09:03,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239401512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169148735] [2021-08-06 14:09:03,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:03,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:03,413 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 14:09:03,414 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 14:09:04,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:09:04,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:04,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:09:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 14:09:05,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169148735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:05,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:05,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-06 14:09:05,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73894498] [2021-08-06 14:09:05,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:09:05,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:09:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:09:05,077 INFO L87 Difference]: Start difference. First operand 14322 states and 41485 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:06,162 INFO L93 Difference]: Finished difference Result 23585 states and 66749 transitions. [2021-08-06 14:09:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 14:09:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 14:09:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:06,220 INFO L225 Difference]: With dead ends: 23585 [2021-08-06 14:09:06,220 INFO L226 Difference]: Without dead ends: 23531 [2021-08-06 14:09:06,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=543, Invalid=1907, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 14:09:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23531 states. [2021-08-06 14:09:06,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23531 to 15895. [2021-08-06 14:09:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15895 states, 15894 states have (on average 2.8903359758399394) internal successors, (45939), 15894 states have internal predecessors, (45939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 45939 transitions. [2021-08-06 14:09:06,573 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 45939 transitions. Word has length 32 [2021-08-06 14:09:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:06,573 INFO L470 AbstractCegarLoop]: Abstraction has 15895 states and 45939 transitions. [2021-08-06 14:09:06,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 45939 transitions. [2021-08-06 14:09:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:06,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:06,581 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:06,606 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 14:09:06,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:06,781 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:06,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1854825621, now seen corresponding path program 9 times [2021-08-06 14:09:06,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:06,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729847997] [2021-08-06 14:09:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:06,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:06,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:06,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729847997] [2021-08-06 14:09:06,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729847997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:06,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44615399] [2021-08-06 14:09:06,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:06,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:06,892 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 14:09:06,893 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 14:09:08,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:09:08,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:08,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44615399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:08,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:08,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:09:08,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623338251] [2021-08-06 14:09:08,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:09:08,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:09:08,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:08,418 INFO L87 Difference]: Start difference. First operand 15895 states and 45939 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:08,791 INFO L93 Difference]: Finished difference Result 16589 states and 47370 transitions. [2021-08-06 14:09:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:08,828 INFO L225 Difference]: With dead ends: 16589 [2021-08-06 14:09:08,828 INFO L226 Difference]: Without dead ends: 16552 [2021-08-06 14:09:08,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:09:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16552 states. [2021-08-06 14:09:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16552 to 15790. [2021-08-06 14:09:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15790 states, 15789 states have (on average 2.8915700804357463) internal successors, (45655), 15789 states have internal predecessors, (45655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15790 states to 15790 states and 45655 transitions. [2021-08-06 14:09:09,106 INFO L78 Accepts]: Start accepts. Automaton has 15790 states and 45655 transitions. Word has length 35 [2021-08-06 14:09:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:09,106 INFO L470 AbstractCegarLoop]: Abstraction has 15790 states and 45655 transitions. [2021-08-06 14:09:09,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 15790 states and 45655 transitions. [2021-08-06 14:09:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:09,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:09,114 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:09,134 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 14:09:09,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:09,317 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash -972961707, now seen corresponding path program 14 times [2021-08-06 14:09:09,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:09,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538848545] [2021-08-06 14:09:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:09,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:09,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:09,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538848545] [2021-08-06 14:09:09,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538848545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:09,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210403245] [2021-08-06 14:09:09,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:09,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:09,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:09,496 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 14:09:09,497 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 14:09:10,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:10,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:10,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:11,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210403245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:11,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:11,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 14:09:11,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976876442] [2021-08-06 14:09:11,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:09:11,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:09:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:09:11,076 INFO L87 Difference]: Start difference. First operand 15790 states and 45655 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:11,520 INFO L93 Difference]: Finished difference Result 15768 states and 45494 transitions. [2021-08-06 14:09:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:11,558 INFO L225 Difference]: With dead ends: 15768 [2021-08-06 14:09:11,558 INFO L226 Difference]: Without dead ends: 15665 [2021-08-06 14:09:11,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:09:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15665 states. [2021-08-06 14:09:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15665 to 15626. [2021-08-06 14:09:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15626 states, 15625 states have (on average 2.893952) internal successors, (45218), 15625 states have internal predecessors, (45218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15626 states to 15626 states and 45218 transitions. [2021-08-06 14:09:11,905 INFO L78 Accepts]: Start accepts. Automaton has 15626 states and 45218 transitions. Word has length 35 [2021-08-06 14:09:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:11,905 INFO L470 AbstractCegarLoop]: Abstraction has 15626 states and 45218 transitions. [2021-08-06 14:09:11,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 15626 states and 45218 transitions. [2021-08-06 14:09:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:11,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:11,914 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:11,938 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 14:09:12,114 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,SelfDestructingSolverStorable82 [2021-08-06 14:09:12,115 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:12,115 INFO L82 PathProgramCache]: Analyzing trace with hash -800888287, now seen corresponding path program 15 times [2021-08-06 14:09:12,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:12,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779668694] [2021-08-06 14:09:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:12,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:12,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:12,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779668694] [2021-08-06 14:09:12,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779668694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:12,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097228515] [2021-08-06 14:09:12,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:12,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:12,229 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 14:09:12,248 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 14:09:13,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:09:13,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:13,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:13,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097228515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:13,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:13,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:09:13,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388956205] [2021-08-06 14:09:13,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:09:13,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:09:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:09:13,713 INFO L87 Difference]: Start difference. First operand 15626 states and 45218 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 14:09:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:13,905 INFO L93 Difference]: Finished difference Result 15851 states and 45656 transitions. [2021-08-06 14:09:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 35 [2021-08-06 14:09:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:13,946 INFO L225 Difference]: With dead ends: 15851 [2021-08-06 14:09:13,946 INFO L226 Difference]: Without dead ends: 15851 [2021-08-06 14:09:13,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15851 states. [2021-08-06 14:09:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15851 to 15626. [2021-08-06 14:09:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15626 states, 15625 states have (on average 2.893952) internal successors, (45218), 15625 states have internal predecessors, (45218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15626 states to 15626 states and 45218 transitions. [2021-08-06 14:09:14,317 INFO L78 Accepts]: Start accepts. Automaton has 15626 states and 45218 transitions. Word has length 35 [2021-08-06 14:09:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:14,318 INFO L470 AbstractCegarLoop]: Abstraction has 15626 states and 45218 transitions. [2021-08-06 14:09:14,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 14:09:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15626 states and 45218 transitions. [2021-08-06 14:09:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:14,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:14,326 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:14,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:14,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:14,527 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:14,527 INFO L82 PathProgramCache]: Analyzing trace with hash 649055720, now seen corresponding path program 10 times [2021-08-06 14:09:14,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:14,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109201955] [2021-08-06 14:09:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:14,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:14,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:14,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109201955] [2021-08-06 14:09:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109201955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:14,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742487013] [2021-08-06 14:09:14,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:14,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:14,640 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 14:09:14,648 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 14:09:15,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:15,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:09:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:16,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742487013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:16,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:16,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-08-06 14:09:16,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204473990] [2021-08-06 14:09:16,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:09:16,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:09:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:09:16,208 INFO L87 Difference]: Start difference. First operand 15626 states and 45218 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:16,462 INFO L93 Difference]: Finished difference Result 17379 states and 49089 transitions. [2021-08-06 14:09:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:09:16,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:16,509 INFO L225 Difference]: With dead ends: 17379 [2021-08-06 14:09:16,509 INFO L226 Difference]: Without dead ends: 17355 [2021-08-06 14:09:16,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:09:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17355 states. [2021-08-06 14:09:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17355 to 15662. [2021-08-06 14:09:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15662 states, 15661 states have (on average 2.8912585403230957) internal successors, (45280), 15661 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15662 states to 15662 states and 45280 transitions. [2021-08-06 14:09:16,924 INFO L78 Accepts]: Start accepts. Automaton has 15662 states and 45280 transitions. Word has length 35 [2021-08-06 14:09:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:16,924 INFO L470 AbstractCegarLoop]: Abstraction has 15662 states and 45280 transitions. [2021-08-06 14:09:16,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15662 states and 45280 transitions. [2021-08-06 14:09:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:16,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:16,932 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:16,952 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 14:09:17,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:17,133 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1763440021, now seen corresponding path program 16 times [2021-08-06 14:09:17,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:17,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898053145] [2021-08-06 14:09:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:17,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:09:17,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:17,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898053145] [2021-08-06 14:09:17,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898053145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:17,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876423094] [2021-08-06 14:09:17,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:17,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:17,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:17,236 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 14:09:17,237 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 14:09:18,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:18,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:18,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:18,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:09:18,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876423094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:18,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:18,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:09:18,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500853636] [2021-08-06 14:09:18,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:09:18,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:09:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:09:18,715 INFO L87 Difference]: Start difference. First operand 15662 states and 45280 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:19,106 INFO L93 Difference]: Finished difference Result 16081 states and 46080 transitions. [2021-08-06 14:09:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:19,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:19,140 INFO L225 Difference]: With dead ends: 16081 [2021-08-06 14:09:19,140 INFO L226 Difference]: Without dead ends: 15938 [2021-08-06 14:09:19,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15938 states. [2021-08-06 14:09:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15938 to 15645. [2021-08-06 14:09:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15645 states, 15644 states have (on average 2.879506520071593) internal successors, (45047), 15644 states have internal predecessors, (45047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15645 states to 15645 states and 45047 transitions. [2021-08-06 14:09:19,461 INFO L78 Accepts]: Start accepts. Automaton has 15645 states and 45047 transitions. Word has length 35 [2021-08-06 14:09:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:19,461 INFO L470 AbstractCegarLoop]: Abstraction has 15645 states and 45047 transitions. [2021-08-06 14:09:19,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 15645 states and 45047 transitions. [2021-08-06 14:09:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:19,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:19,468 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:19,488 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 14:09:19,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:19,685 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1149903841, now seen corresponding path program 17 times [2021-08-06 14:09:19,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:19,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83846002] [2021-08-06 14:09:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:19,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:09:19,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:19,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83846002] [2021-08-06 14:09:19,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83846002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:19,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692141278] [2021-08-06 14:09:19,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:19,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:19,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:19,776 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 14:09:19,777 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 14:09:21,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:09:21,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:09:21,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692141278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:21,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:21,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:09:21,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838307423] [2021-08-06 14:09:21,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:09:21,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:09:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:09:21,273 INFO L87 Difference]: Start difference. First operand 15645 states and 45047 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 14:09:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:21,506 INFO L93 Difference]: Finished difference Result 16454 states and 46829 transitions. [2021-08-06 14:09:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 35 [2021-08-06 14:09:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:21,541 INFO L225 Difference]: With dead ends: 16454 [2021-08-06 14:09:21,541 INFO L226 Difference]: Without dead ends: 16442 [2021-08-06 14:09:21,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16442 states. [2021-08-06 14:09:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16442 to 15912. [2021-08-06 14:09:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15912 states, 15911 states have (on average 2.8726667085664004) internal successors, (45707), 15911 states have internal predecessors, (45707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15912 states to 15912 states and 45707 transitions. [2021-08-06 14:09:21,884 INFO L78 Accepts]: Start accepts. Automaton has 15912 states and 45707 transitions. Word has length 35 [2021-08-06 14:09:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:21,884 INFO L470 AbstractCegarLoop]: Abstraction has 15912 states and 45707 transitions. [2021-08-06 14:09:21,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 14:09:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 15912 states and 45707 transitions. [2021-08-06 14:09:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:21,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:21,892 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:21,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:22,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-06 14:09:22,111 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:22,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1003146121, now seen corresponding path program 18 times [2021-08-06 14:09:22,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:22,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59915209] [2021-08-06 14:09:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:22,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:22,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:22,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59915209] [2021-08-06 14:09:22,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59915209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:22,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472724822] [2021-08-06 14:09:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:22,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:22,194 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 14:09:22,195 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 14:09:23,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 14:09:23,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:23,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:23,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:23,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472724822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:23,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:23,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:09:23,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825846331] [2021-08-06 14:09:23,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:09:23,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:09:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:23,725 INFO L87 Difference]: Start difference. First operand 15912 states and 45707 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 14:09:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:24,019 INFO L93 Difference]: Finished difference Result 16908 states and 47747 transitions. [2021-08-06 14:09:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:09:24,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 35 [2021-08-06 14:09:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:24,064 INFO L225 Difference]: With dead ends: 16908 [2021-08-06 14:09:24,064 INFO L226 Difference]: Without dead ends: 16896 [2021-08-06 14:09:24,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-08-06 14:09:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 15621. [2021-08-06 14:09:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15621 states, 15620 states have (on average 2.870998719590269) internal successors, (44845), 15620 states have internal predecessors, (44845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15621 states to 15621 states and 44845 transitions. [2021-08-06 14:09:24,467 INFO L78 Accepts]: Start accepts. Automaton has 15621 states and 44845 transitions. Word has length 35 [2021-08-06 14:09:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:24,467 INFO L470 AbstractCegarLoop]: Abstraction has 15621 states and 44845 transitions. [2021-08-06 14:09:24,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 14:09:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 15621 states and 44845 transitions. [2021-08-06 14:09:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:24,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:24,475 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:24,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 14:09:24,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 14:09:24,676 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:24,676 INFO L82 PathProgramCache]: Analyzing trace with hash 529412988, now seen corresponding path program 19 times [2021-08-06 14:09:24,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:24,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858592507] [2021-08-06 14:09:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:24,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:24,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:24,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858592507] [2021-08-06 14:09:24,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858592507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:24,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229345762] [2021-08-06 14:09:24,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:24,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:24,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:24,773 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 14:09:24,774 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 14:09:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:09:26,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:26,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229345762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:26,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:26,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:09:26,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588180268] [2021-08-06 14:09:26,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:26,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:26,387 INFO L87 Difference]: Start difference. First operand 15621 states and 44845 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:26,592 INFO L93 Difference]: Finished difference Result 15905 states and 45325 transitions. [2021-08-06 14:09:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:09:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:26,636 INFO L225 Difference]: With dead ends: 15905 [2021-08-06 14:09:26,636 INFO L226 Difference]: Without dead ends: 15884 [2021-08-06 14:09:26,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:09:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15884 states. [2021-08-06 14:09:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15884 to 14989. [2021-08-06 14:09:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14989 states, 14988 states have (on average 2.8778356018147853) internal successors, (43133), 14988 states have internal predecessors, (43133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14989 states to 14989 states and 43133 transitions. [2021-08-06 14:09:27,052 INFO L78 Accepts]: Start accepts. Automaton has 14989 states and 43133 transitions. Word has length 35 [2021-08-06 14:09:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:27,052 INFO L470 AbstractCegarLoop]: Abstraction has 14989 states and 43133 transitions. [2021-08-06 14:09:27,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14989 states and 43133 transitions. [2021-08-06 14:09:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:27,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:27,059 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:27,079 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 14:09:27,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-06 14:09:27,260 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1764899259, now seen corresponding path program 11 times [2021-08-06 14:09:27,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:27,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478078516] [2021-08-06 14:09:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:27,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:09:27,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:27,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478078516] [2021-08-06 14:09:27,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478078516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:27,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977488793] [2021-08-06 14:09:27,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:27,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:27,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:27,388 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 14:09:27,401 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 14:09:28,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:09:28,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:09:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977488793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:28,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:28,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:09:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894236708] [2021-08-06 14:09:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:09:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:09:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:09:28,963 INFO L87 Difference]: Start difference. First operand 14989 states and 43133 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:29,206 INFO L93 Difference]: Finished difference Result 15938 states and 45064 transitions. [2021-08-06 14:09:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:29,244 INFO L225 Difference]: With dead ends: 15938 [2021-08-06 14:09:29,245 INFO L226 Difference]: Without dead ends: 15922 [2021-08-06 14:09:29,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15922 states. [2021-08-06 14:09:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15922 to 15255. [2021-08-06 14:09:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15255 states, 15254 states have (on average 2.864887898256195) internal successors, (43701), 15254 states have internal predecessors, (43701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15255 states to 15255 states and 43701 transitions. [2021-08-06 14:09:29,674 INFO L78 Accepts]: Start accepts. Automaton has 15255 states and 43701 transitions. Word has length 35 [2021-08-06 14:09:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:29,674 INFO L470 AbstractCegarLoop]: Abstraction has 15255 states and 43701 transitions. [2021-08-06 14:09:29,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15255 states and 43701 transitions. [2021-08-06 14:09:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:29,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:29,682 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:29,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 14:09:29,882 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,SelfDestructingSolverStorable89 [2021-08-06 14:09:29,883 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:29,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:29,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1029735045, now seen corresponding path program 20 times [2021-08-06 14:09:29,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:29,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898175960] [2021-08-06 14:09:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:29,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:09:30,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:30,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898175960] [2021-08-06 14:09:30,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898175960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:30,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103650263] [2021-08-06 14:09:30,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:30,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:30,013 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 14:09:30,013 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 14:09:31,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:31,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:09:31,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103650263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:31,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:31,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:09:31,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145147198] [2021-08-06 14:09:31,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:09:31,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:31,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:09:31,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:09:31,706 INFO L87 Difference]: Start difference. First operand 15255 states and 43701 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:32,024 INFO L93 Difference]: Finished difference Result 14661 states and 41414 transitions. [2021-08-06 14:09:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:32,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:32,061 INFO L225 Difference]: With dead ends: 14661 [2021-08-06 14:09:32,061 INFO L226 Difference]: Without dead ends: 14432 [2021-08-06 14:09:32,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14432 states. [2021-08-06 14:09:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14432 to 14073. [2021-08-06 14:09:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14073 states, 14072 states have (on average 2.8222001137009665) internal successors, (39714), 14072 states have internal predecessors, (39714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14073 states to 14073 states and 39714 transitions. [2021-08-06 14:09:32,363 INFO L78 Accepts]: Start accepts. Automaton has 14073 states and 39714 transitions. Word has length 35 [2021-08-06 14:09:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:32,363 INFO L470 AbstractCegarLoop]: Abstraction has 14073 states and 39714 transitions. [2021-08-06 14:09:32,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 14073 states and 39714 transitions. [2021-08-06 14:09:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:32,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:32,371 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:32,391 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 14:09:32,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:32,572 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1003338568, now seen corresponding path program 21 times [2021-08-06 14:09:32,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:32,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913393273] [2021-08-06 14:09:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:32,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:32,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:32,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913393273] [2021-08-06 14:09:32,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913393273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:32,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467121193] [2021-08-06 14:09:32,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:32,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:32,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:32,665 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 14:09:32,665 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 14:09:34,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:09:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:34,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:09:34,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:09:34,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467121193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:34,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:34,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:09:34,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884220472] [2021-08-06 14:09:34,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:09:34,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:09:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:34,371 INFO L87 Difference]: Start difference. First operand 14073 states and 39714 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:34,550 INFO L93 Difference]: Finished difference Result 14656 states and 40757 transitions. [2021-08-06 14:09:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:09:34,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:34,586 INFO L225 Difference]: With dead ends: 14656 [2021-08-06 14:09:34,586 INFO L226 Difference]: Without dead ends: 14635 [2021-08-06 14:09:34,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:09:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14635 states. [2021-08-06 14:09:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14635 to 14044. [2021-08-06 14:09:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14044 states, 14043 states have (on average 2.814854375845617) internal successors, (39529), 14043 states have internal predecessors, (39529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14044 states to 14044 states and 39529 transitions. [2021-08-06 14:09:34,852 INFO L78 Accepts]: Start accepts. Automaton has 14044 states and 39529 transitions. Word has length 35 [2021-08-06 14:09:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:34,852 INFO L470 AbstractCegarLoop]: Abstraction has 14044 states and 39529 transitions. [2021-08-06 14:09:34,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 14044 states and 39529 transitions. [2021-08-06 14:09:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:34,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:34,859 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:34,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 14:09:35,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:35,065 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2031205218, now seen corresponding path program 22 times [2021-08-06 14:09:35,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:35,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102798745] [2021-08-06 14:09:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:35,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:35,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:35,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102798745] [2021-08-06 14:09:35,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102798745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:35,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656478112] [2021-08-06 14:09:35,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:35,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:35,164 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 14:09:35,164 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 14:09:36,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:09:36,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:36,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656478112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:36,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:36,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:09:36,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120479786] [2021-08-06 14:09:36,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:36,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:36,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:36,879 INFO L87 Difference]: Start difference. First operand 14044 states and 39529 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:37,080 INFO L93 Difference]: Finished difference Result 14636 states and 40588 transitions. [2021-08-06 14:09:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:37,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:37,110 INFO L225 Difference]: With dead ends: 14636 [2021-08-06 14:09:37,111 INFO L226 Difference]: Without dead ends: 14612 [2021-08-06 14:09:37,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:09:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14612 states. [2021-08-06 14:09:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14612 to 13135. [2021-08-06 14:09:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 2.8171920207096086) internal successors, (37001), 13134 states have internal predecessors, (37001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 37001 transitions. [2021-08-06 14:09:37,338 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 37001 transitions. Word has length 35 [2021-08-06 14:09:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:37,338 INFO L470 AbstractCegarLoop]: Abstraction has 13135 states and 37001 transitions. [2021-08-06 14:09:37,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:37,338 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 37001 transitions. [2021-08-06 14:09:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:37,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:37,344 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:37,371 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 14:09:37,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:37,545 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash 653482643, now seen corresponding path program 23 times [2021-08-06 14:09:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:37,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280972958] [2021-08-06 14:09:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:37,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:37,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:37,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280972958] [2021-08-06 14:09:37,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280972958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:37,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621576667] [2021-08-06 14:09:37,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:37,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:37,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:37,632 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 14:09:37,632 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 14:09:39,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 14:09:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:39,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621576667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:39,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:39,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:09:39,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955530837] [2021-08-06 14:09:39,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:39,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:39,265 INFO L87 Difference]: Start difference. First operand 13135 states and 37001 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:09:39,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:39,578 INFO L93 Difference]: Finished difference Result 13567 states and 37130 transitions. [2021-08-06 14:09:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:09:39,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 35 [2021-08-06 14:09:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:39,607 INFO L225 Difference]: With dead ends: 13567 [2021-08-06 14:09:39,607 INFO L226 Difference]: Without dead ends: 13501 [2021-08-06 14:09:39,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:09:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13501 states. [2021-08-06 14:09:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13501 to 10385. [2021-08-06 14:09:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10385 states, 10384 states have (on average 2.815870570107858) internal successors, (29240), 10384 states have internal predecessors, (29240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10385 states to 10385 states and 29240 transitions. [2021-08-06 14:09:39,884 INFO L78 Accepts]: Start accepts. Automaton has 10385 states and 29240 transitions. Word has length 35 [2021-08-06 14:09:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:39,884 INFO L470 AbstractCegarLoop]: Abstraction has 10385 states and 29240 transitions. [2021-08-06 14:09:39,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:09:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 10385 states and 29240 transitions. [2021-08-06 14:09:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:39,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:39,890 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:39,912 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 14:09:40,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:40,091 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1040085320, now seen corresponding path program 24 times [2021-08-06 14:09:40,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:40,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619155547] [2021-08-06 14:09:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:40,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:40,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:40,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619155547] [2021-08-06 14:09:40,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619155547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:40,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807064663] [2021-08-06 14:09:40,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:40,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:40,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:40,241 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 14:09:40,284 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 14:09:41,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:09:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:09:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:42,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807064663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:42,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:42,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:09:42,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593961502] [2021-08-06 14:09:42,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:09:42,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:09:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:42,073 INFO L87 Difference]: Start difference. First operand 10385 states and 29240 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:42,290 INFO L93 Difference]: Finished difference Result 10777 states and 29915 transitions. [2021-08-06 14:09:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:09:42,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:42,309 INFO L225 Difference]: With dead ends: 10777 [2021-08-06 14:09:42,310 INFO L226 Difference]: Without dead ends: 10750 [2021-08-06 14:09:42,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-08-06 14:09:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 10406. [2021-08-06 14:09:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10405 states have (on average 2.8100913022585297) internal successors, (29239), 10405 states have internal predecessors, (29239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 29239 transitions. [2021-08-06 14:09:42,479 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 29239 transitions. Word has length 35 [2021-08-06 14:09:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:42,479 INFO L470 AbstractCegarLoop]: Abstraction has 10406 states and 29239 transitions. [2021-08-06 14:09:42,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 29239 transitions. [2021-08-06 14:09:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:42,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:42,484 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:42,511 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 14:09:42,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:42,685 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:42,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2009131819, now seen corresponding path program 12 times [2021-08-06 14:09:42,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:42,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358503747] [2021-08-06 14:09:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:42,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:42,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:42,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358503747] [2021-08-06 14:09:42,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358503747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:42,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323871067] [2021-08-06 14:09:42,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:42,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:42,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:42,777 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 14:09:42,778 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 14:09:44,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:09:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:44,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:44,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323871067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:44,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:44,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:09:44,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522832566] [2021-08-06 14:09:44,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:44,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:44,481 INFO L87 Difference]: Start difference. First operand 10406 states and 29239 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:44,750 INFO L93 Difference]: Finished difference Result 11098 states and 30591 transitions. [2021-08-06 14:09:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:09:44,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:44,771 INFO L225 Difference]: With dead ends: 11098 [2021-08-06 14:09:44,771 INFO L226 Difference]: Without dead ends: 11080 [2021-08-06 14:09:44,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:09:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11080 states. [2021-08-06 14:09:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11080 to 9804. [2021-08-06 14:09:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9804 states, 9803 states have (on average 2.826685708456595) internal successors, (27710), 9803 states have internal predecessors, (27710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 27710 transitions. [2021-08-06 14:09:44,958 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 27710 transitions. Word has length 35 [2021-08-06 14:09:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:44,958 INFO L470 AbstractCegarLoop]: Abstraction has 9804 states and 27710 transitions. [2021-08-06 14:09:44,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 27710 transitions. [2021-08-06 14:09:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:44,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:44,964 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:44,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 14:09:45,164 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,SelfDestructingSolverStorable95 [2021-08-06 14:09:45,165 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2106314078, now seen corresponding path program 25 times [2021-08-06 14:09:45,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:45,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365761590] [2021-08-06 14:09:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:45,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-06 14:09:45,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:45,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365761590] [2021-08-06 14:09:45,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365761590] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:09:45,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:09:45,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:09:45,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058684654] [2021-08-06 14:09:45,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:09:45,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:09:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:09:45,182 INFO L87 Difference]: Start difference. First operand 9804 states and 27710 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 14:09:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:45,191 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-08-06 14:09:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:09:45,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 35 [2021-08-06 14:09:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:45,194 INFO L225 Difference]: With dead ends: 2349 [2021-08-06 14:09:45,195 INFO L226 Difference]: Without dead ends: 2331 [2021-08-06 14:09:45,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:09:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-06 14:09:45,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-08-06 14:09:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3343002175489485) internal successors, (3219), 1379 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-08-06 14:09:45,214 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-08-06 14:09:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:45,215 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-08-06 14:09:45,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 14:09:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-08-06 14:09:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:45,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:45,216 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:45,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-06 14:09:45,217 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2108944533, now seen corresponding path program 26 times [2021-08-06 14:09:45,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:45,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217254836] [2021-08-06 14:09:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:45,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:45,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:45,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217254836] [2021-08-06 14:09:45,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217254836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:45,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533577538] [2021-08-06 14:09:45,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:45,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:45,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:45,334 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 14:09:45,335 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 14:09:46,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:46,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:47,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533577538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:47,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:47,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 14:09:47,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535113750] [2021-08-06 14:09:47,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:09:47,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:09:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:09:47,201 INFO L87 Difference]: Start difference. First operand 1380 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:47,450 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-08-06 14:09:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:09:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:47,453 INFO L225 Difference]: With dead ends: 1429 [2021-08-06 14:09:47,453 INFO L226 Difference]: Without dead ends: 1397 [2021-08-06 14:09:47,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:09:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-08-06 14:09:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-08-06 14:09:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3299492385786804) internal successors, (3213), 1379 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-08-06 14:09:47,466 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-08-06 14:09:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:47,466 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-08-06 14:09:47,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-08-06 14:09:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:47,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:47,467 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:47,495 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 14:09:47,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 14:09:47,668 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash -249250038, now seen corresponding path program 27 times [2021-08-06 14:09:47,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:47,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409343] [2021-08-06 14:09:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:47,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:47,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:47,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409343] [2021-08-06 14:09:47,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:47,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995625946] [2021-08-06 14:09:47,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:47,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:47,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:47,766 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 14:09:47,767 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 14:09:49,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:09:49,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:49,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:09:49,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:49,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995625946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:49,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:49,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:09:49,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171659038] [2021-08-06 14:09:49,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:49,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:49,572 INFO L87 Difference]: Start difference. First operand 1380 states and 3213 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:49,725 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-08-06 14:09:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:09:49,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:49,728 INFO L225 Difference]: With dead ends: 2071 [2021-08-06 14:09:49,728 INFO L226 Difference]: Without dead ends: 2071 [2021-08-06 14:09:49,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:09:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-08-06 14:09:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-08-06 14:09:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.4023591087811274) internal successors, (3666), 1526 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-08-06 14:09:49,745 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-08-06 14:09:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:49,745 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-08-06 14:09:49,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-08-06 14:09:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:49,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:49,747 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:49,774 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 14:09:49,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-06 14:09:49,947 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1020085705, now seen corresponding path program 13 times [2021-08-06 14:09:49,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:49,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682975390] [2021-08-06 14:09:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:49,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:50,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:50,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682975390] [2021-08-06 14:09:50,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682975390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:50,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264895008] [2021-08-06 14:09:50,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:50,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:50,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:50,037 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 14:09:50,038 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 14:09:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:51,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264895008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:51,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:51,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:09:51,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518157055] [2021-08-06 14:09:51,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:09:51,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:09:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:51,816 INFO L87 Difference]: Start difference. First operand 1527 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:52,018 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-08-06 14:09:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:09:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:52,021 INFO L225 Difference]: With dead ends: 1909 [2021-08-06 14:09:52,021 INFO L226 Difference]: Without dead ends: 1905 [2021-08-06 14:09:52,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-08-06 14:09:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-08-06 14:09:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.40327868852459) internal successors, (3665), 1525 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-08-06 14:09:52,038 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-08-06 14:09:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:52,038 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-08-06 14:09:52,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-08-06 14:09:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:52,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:52,039 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:52,067 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 14:09:52,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:52,240 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1641585207, now seen corresponding path program 28 times [2021-08-06 14:09:52,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:52,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124592203] [2021-08-06 14:09:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:52,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:52,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:52,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124592203] [2021-08-06 14:09:52,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124592203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:52,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647414767] [2021-08-06 14:09:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:52,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:52,331 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 14:09:52,331 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 14:09:53,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:53,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:53,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:09:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:54,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647414767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:54,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:54,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:09:54,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297632915] [2021-08-06 14:09:54,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:54,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:54,198 INFO L87 Difference]: Start difference. First operand 1526 states and 3665 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:54,343 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-08-06 14:09:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:09:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:54,345 INFO L225 Difference]: With dead ends: 1563 [2021-08-06 14:09:54,345 INFO L226 Difference]: Without dead ends: 1543 [2021-08-06 14:09:54,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-08-06 14:09:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-08-06 14:09:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.401311475409836) internal successors, (3662), 1525 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-08-06 14:09:54,373 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-08-06 14:09:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:54,373 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-08-06 14:09:54,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-08-06 14:09:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:54,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:54,375 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:54,399 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 14:09:54,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:54,576 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1220962274, now seen corresponding path program 29 times [2021-08-06 14:09:54,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:54,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904748958] [2021-08-06 14:09:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:54,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:54,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:54,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904748958] [2021-08-06 14:09:54,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904748958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:54,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254110823] [2021-08-06 14:09:54,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:54,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:54,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:54,663 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 14:09:54,664 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 14:09:56,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:09:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:09:56,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:56,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254110823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:56,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:56,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 14:09:56,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960186334] [2021-08-06 14:09:56,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:09:56,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:56,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:09:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:56,488 INFO L87 Difference]: Start difference. First operand 1526 states and 3662 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:56,610 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-08-06 14:09:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:09:56,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:56,613 INFO L225 Difference]: With dead ends: 2415 [2021-08-06 14:09:56,613 INFO L226 Difference]: Without dead ends: 2415 [2021-08-06 14:09:56,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:09:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-08-06 14:09:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-08-06 14:09:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.4473365617433416) internal successors, (4043), 1652 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-08-06 14:09:56,633 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-08-06 14:09:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:56,633 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-08-06 14:09:56,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-08-06 14:09:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:56,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:56,635 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:56,656 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 14:09:56,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 14:09:56,835 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash 982900757, now seen corresponding path program 14 times [2021-08-06 14:09:56,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:56,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061958726] [2021-08-06 14:09:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:56,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:56,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:56,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061958726] [2021-08-06 14:09:56,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061958726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:56,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346274507] [2021-08-06 14:09:56,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:56,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:56,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:56,933 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 14:09:56,934 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 14:09:58,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 14:09:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:58,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346274507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:58,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:58,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:09:58,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073211168] [2021-08-06 14:09:58,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:09:58,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:09:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:58,750 INFO L87 Difference]: Start difference. First operand 1653 states and 4043 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:58,990 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-08-06 14:09:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:09:58,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:09:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:58,993 INFO L225 Difference]: With dead ends: 2638 [2021-08-06 14:09:58,993 INFO L226 Difference]: Without dead ends: 2596 [2021-08-06 14:09:58,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:09:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-06 14:09:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-08-06 14:09:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.4592959295929595) internal successors, (4471), 1818 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-08-06 14:09:59,014 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-08-06 14:09:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:59,015 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-08-06 14:09:59,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-08-06 14:09:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:09:59,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:59,016 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:59,037 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 14:09:59,223 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,SelfDestructingSolverStorable102 [2021-08-06 14:09:59,224 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:09:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash -570796100, now seen corresponding path program 30 times [2021-08-06 14:09:59,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:59,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732805372] [2021-08-06 14:09:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:59,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:59,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:59,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732805372] [2021-08-06 14:09:59,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732805372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:59,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491363485] [2021-08-06 14:09:59,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:59,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:59,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:59,313 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 14:09:59,313 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 14:10:00,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:10:00,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:10:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:01,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491363485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:01,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:01,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:10:01,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923619909] [2021-08-06 14:10:01,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:10:01,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:10:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:10:01,090 INFO L87 Difference]: Start difference. First operand 1819 states and 4471 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:01,204 INFO L93 Difference]: Finished difference Result 2417 states and 5580 transitions. [2021-08-06 14:10:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:10:01,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:01,208 INFO L225 Difference]: With dead ends: 2417 [2021-08-06 14:10:01,208 INFO L226 Difference]: Without dead ends: 2414 [2021-08-06 14:10:01,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:10:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-08-06 14:10:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1818. [2021-08-06 14:10:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.45789763346175) internal successors, (4466), 1817 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-08-06 14:10:01,229 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-08-06 14:10:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:01,229 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-08-06 14:10:01,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-08-06 14:10:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:01,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:01,231 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:01,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:01,432 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,SelfDestructingSolverStorable103 [2021-08-06 14:10:01,432 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:01,432 INFO L82 PathProgramCache]: Analyzing trace with hash -363733534, now seen corresponding path program 31 times [2021-08-06 14:10:01,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:01,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478571957] [2021-08-06 14:10:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:01,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:01,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:01,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478571957] [2021-08-06 14:10:01,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478571957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:01,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814952830] [2021-08-06 14:10:01,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:01,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:01,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:01,513 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 14:10:01,513 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 14:10:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:03,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:10:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:10:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814952830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:03,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:03,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:10:03,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694179170] [2021-08-06 14:10:03,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:10:03,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:10:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:10:03,349 INFO L87 Difference]: Start difference. First operand 1818 states and 4466 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:03,451 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-08-06 14:10:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:10:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:03,455 INFO L225 Difference]: With dead ends: 2608 [2021-08-06 14:10:03,455 INFO L226 Difference]: Without dead ends: 2596 [2021-08-06 14:10:03,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-06 14:10:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-08-06 14:10:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.4574795081967213) internal successors, (4797), 1952 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-08-06 14:10:03,479 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-08-06 14:10:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:03,479 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-08-06 14:10:03,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-08-06 14:10:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:03,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:03,481 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:03,504 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 14:10:03,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:03,682 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1811733547, now seen corresponding path program 32 times [2021-08-06 14:10:03,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:03,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665819434] [2021-08-06 14:10:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:03,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:03,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:03,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665819434] [2021-08-06 14:10:03,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665819434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:03,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708844364] [2021-08-06 14:10:03,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:10:03,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:03,780 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 14:10:03,781 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 14:10:05,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:10:05,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:05,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:10:05,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:05,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708844364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:05,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:05,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:10:05,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650935221] [2021-08-06 14:10:05,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:10:05,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:05,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:10:05,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:10:05,616 INFO L87 Difference]: Start difference. First operand 1953 states and 4797 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:05,853 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-08-06 14:10:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:10:05,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:05,856 INFO L225 Difference]: With dead ends: 2377 [2021-08-06 14:10:05,856 INFO L226 Difference]: Without dead ends: 2298 [2021-08-06 14:10:05,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-06 14:10:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-08-06 14:10:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 2.4416419386745796) internal successors, (4937), 2022 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-08-06 14:10:05,878 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-08-06 14:10:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:05,878 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-08-06 14:10:05,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-08-06 14:10:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:05,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:05,880 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:05,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:10:06,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:06,081 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:06,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:06,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1869697569, now seen corresponding path program 33 times [2021-08-06 14:10:06,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:06,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122046367] [2021-08-06 14:10:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:06,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:10:06,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:06,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122046367] [2021-08-06 14:10:06,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122046367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:06,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824031942] [2021-08-06 14:10:06,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:10:06,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:06,164 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 14:10:06,165 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 14:10:07,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:10:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:10:07,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:10:07,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824031942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:07,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:07,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:10:07,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422628406] [2021-08-06 14:10:07,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:10:07,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:10:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:10:07,929 INFO L87 Difference]: Start difference. First operand 2023 states and 4937 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:08,099 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-08-06 14:10:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:10:08,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:08,102 INFO L225 Difference]: With dead ends: 2392 [2021-08-06 14:10:08,102 INFO L226 Difference]: Without dead ends: 2380 [2021-08-06 14:10:08,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-08-06 14:10:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-08-06 14:10:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.441205533596838) internal successors, (4941), 2024 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-08-06 14:10:08,126 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-08-06 14:10:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:08,126 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-08-06 14:10:08,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-08-06 14:10:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:08,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:08,128 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:08,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 14:10:08,328 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,SelfDestructingSolverStorable106 [2021-08-06 14:10:08,328 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash -283352393, now seen corresponding path program 34 times [2021-08-06 14:10:08,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:08,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421133575] [2021-08-06 14:10:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:08,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:08,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:08,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421133575] [2021-08-06 14:10:08,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421133575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:08,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901411305] [2021-08-06 14:10:08,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:10:08,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:08,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:08,412 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 14:10:08,412 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 14:10:10,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:10:10,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:10:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:10,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901411305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:10,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:10,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:10:10,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152718969] [2021-08-06 14:10:10,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:10:10,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:10:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:10:10,248 INFO L87 Difference]: Start difference. First operand 2025 states and 4941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 14:10:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:10,491 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-08-06 14:10:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:10:10,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 35 [2021-08-06 14:10:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:10,495 INFO L225 Difference]: With dead ends: 3056 [2021-08-06 14:10:10,495 INFO L226 Difference]: Without dead ends: 3002 [2021-08-06 14:10:10,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:10:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-08-06 14:10:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-08-06 14:10:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4459913586173787) internal successors, (5095), 2083 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-08-06 14:10:10,528 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-08-06 14:10:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:10,528 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-08-06 14:10:10,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 14:10:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-08-06 14:10:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:10,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:10,530 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:10,553 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 14:10:10,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:10,741 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1249206716, now seen corresponding path program 35 times [2021-08-06 14:10:10,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:10,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290220607] [2021-08-06 14:10:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:10,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:10,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:10,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290220607] [2021-08-06 14:10:10,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290220607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:10,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161072330] [2021-08-06 14:10:10,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:10:10,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:10,837 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 14:10:10,871 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 14:10:12,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:10:12,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:12,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:10:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:12,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161072330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:12,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:12,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 14:10:12,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211068632] [2021-08-06 14:10:12,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:10:12,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:10:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:12,681 INFO L87 Difference]: Start difference. First operand 2084 states and 5095 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:12,854 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-08-06 14:10:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:10:12,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:12,858 INFO L225 Difference]: With dead ends: 2889 [2021-08-06 14:10:12,858 INFO L226 Difference]: Without dead ends: 2865 [2021-08-06 14:10:12,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:10:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-08-06 14:10:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-08-06 14:10:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.4678687008784097) internal successors, (5338), 2163 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-08-06 14:10:12,882 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-08-06 14:10:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:12,882 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-08-06 14:10:12,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-08-06 14:10:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:12,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:12,884 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:12,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 14:10:13,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:13,085 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash -128515859, now seen corresponding path program 36 times [2021-08-06 14:10:13,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:13,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149900376] [2021-08-06 14:10:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:13,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:13,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:13,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149900376] [2021-08-06 14:10:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149900376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:13,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415122251] [2021-08-06 14:10:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:10:13,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:13,173 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 14:10:13,173 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 14:10:14,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:10:14,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:10:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:15,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415122251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:15,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:15,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:10:15,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831718181] [2021-08-06 14:10:15,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:10:15,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:10:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:10:15,025 INFO L87 Difference]: Start difference. First operand 2164 states and 5338 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:10:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:15,469 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-08-06 14:10:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:10:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 35 [2021-08-06 14:10:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:15,475 INFO L225 Difference]: With dead ends: 3794 [2021-08-06 14:10:15,475 INFO L226 Difference]: Without dead ends: 3680 [2021-08-06 14:10:15,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:10:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-08-06 14:10:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-08-06 14:10:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.474285714285714) internal successors, (5629), 2275 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-08-06 14:10:15,512 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-08-06 14:10:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:15,512 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-08-06 14:10:15,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:10:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-08-06 14:10:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:15,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:15,514 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:15,543 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 14:10:15,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:15,732 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:15,732 INFO L82 PathProgramCache]: Analyzing trace with hash 258086818, now seen corresponding path program 37 times [2021-08-06 14:10:15,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:15,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538072730] [2021-08-06 14:10:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:15,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:15,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:15,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538072730] [2021-08-06 14:10:15,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538072730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:15,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170022985] [2021-08-06 14:10:15,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:15,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:15,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:15,832 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 14:10:15,832 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 14:10:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:10:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:17,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170022985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:17,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:17,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:10:17,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551822720] [2021-08-06 14:10:17,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:10:17,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:17,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:10:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:17,712 INFO L87 Difference]: Start difference. First operand 2276 states and 5629 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:17,833 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-08-06 14:10:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:10:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:17,836 INFO L225 Difference]: With dead ends: 2985 [2021-08-06 14:10:17,836 INFO L226 Difference]: Without dead ends: 2949 [2021-08-06 14:10:17,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:10:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-08-06 14:10:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-08-06 14:10:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.4725274725274726) internal successors, (5625), 2275 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-08-06 14:10:17,860 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-08-06 14:10:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:17,861 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-08-06 14:10:17,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-08-06 14:10:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:17,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:17,863 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:17,884 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 14:10:18,063 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,SelfDestructingSolverStorable110 [2021-08-06 14:10:18,063 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -188207369, now seen corresponding path program 38 times [2021-08-06 14:10:18,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:18,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230340698] [2021-08-06 14:10:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:18,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:18,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:18,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230340698] [2021-08-06 14:10:18,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230340698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:18,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883687680] [2021-08-06 14:10:18,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:10:18,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:18,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:18,149 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 14:10:18,149 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 14:10:19,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:10:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:10:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:19,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883687680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:19,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:19,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:10:19,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40398995] [2021-08-06 14:10:19,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:10:19,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:19,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:10:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:19,964 INFO L87 Difference]: Start difference. First operand 2276 states and 5625 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:20,236 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-08-06 14:10:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:10:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:20,240 INFO L225 Difference]: With dead ends: 3037 [2021-08-06 14:10:20,240 INFO L226 Difference]: Without dead ends: 2881 [2021-08-06 14:10:20,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:10:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-08-06 14:10:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-08-06 14:10:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.4582730342498795) internal successors, (5096), 2073 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-08-06 14:10:20,262 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-08-06 14:10:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:20,262 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-08-06 14:10:20,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-08-06 14:10:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:20,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:20,264 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:20,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 14:10:20,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:20,466 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash -426268886, now seen corresponding path program 15 times [2021-08-06 14:10:20,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:20,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396876171] [2021-08-06 14:10:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:20,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:20,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:20,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396876171] [2021-08-06 14:10:20,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396876171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:20,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820750849] [2021-08-06 14:10:20,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:10:20,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:20,545 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 14:10:20,546 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 14:10:22,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:10:22,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:22,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:10:22,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:22,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820750849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:22,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:22,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-08-06 14:10:22,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458586710] [2021-08-06 14:10:22,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:10:22,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:10:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:10:22,432 INFO L87 Difference]: Start difference. First operand 2074 states and 5096 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:22,608 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-08-06 14:10:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:22,612 INFO L225 Difference]: With dead ends: 2850 [2021-08-06 14:10:22,612 INFO L226 Difference]: Without dead ends: 2832 [2021-08-06 14:10:22,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:10:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-08-06 14:10:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-08-06 14:10:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.4902046147148456) internal successors, (5720), 2297 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-08-06 14:10:22,638 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-08-06 14:10:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:22,638 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-08-06 14:10:22,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-08-06 14:10:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:22,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:22,640 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:22,668 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 14:10:22,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:22,862 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1048149296, now seen corresponding path program 16 times [2021-08-06 14:10:22,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:22,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632229493] [2021-08-06 14:10:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:22,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:22,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:22,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632229493] [2021-08-06 14:10:22,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632229493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:22,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819076171] [2021-08-06 14:10:22,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:10:22,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:22,943 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 14:10:22,944 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 14:10:24,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:10:24,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:10:24,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:24,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819076171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:24,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:24,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-08-06 14:10:24,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137733361] [2021-08-06 14:10:24,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:10:24,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:10:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:24,875 INFO L87 Difference]: Start difference. First operand 2298 states and 5720 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:25,112 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-08-06 14:10:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:10:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:25,117 INFO L225 Difference]: With dead ends: 2847 [2021-08-06 14:10:25,117 INFO L226 Difference]: Without dead ends: 2847 [2021-08-06 14:10:25,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-08-06 14:10:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-08-06 14:10:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.4724517906336088) internal successors, (5385), 2178 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-08-06 14:10:25,148 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-08-06 14:10:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:25,148 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-08-06 14:10:25,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-08-06 14:10:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 14:10:25,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:25,150 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:25,171 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 14:10:25,351 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,SelfDestructingSolverStorable113 [2021-08-06 14:10:25,351 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1705365500, now seen corresponding path program 39 times [2021-08-06 14:10:25,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:25,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891854695] [2021-08-06 14:10:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:25,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:25,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:25,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891854695] [2021-08-06 14:10:25,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891854695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:25,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466747430] [2021-08-06 14:10:25,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:10:25,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:25,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:25,446 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 14:10:25,446 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 14:10:27,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:10:27,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:27,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 14:10:27,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:27,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466747430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:27,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:27,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:10:27,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736964599] [2021-08-06 14:10:27,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:10:27,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:10:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:10:27,461 INFO L87 Difference]: Start difference. First operand 2179 states and 5385 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:27,639 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-08-06 14:10:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:10:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 14:10:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:27,643 INFO L225 Difference]: With dead ends: 2663 [2021-08-06 14:10:27,643 INFO L226 Difference]: Without dead ends: 2616 [2021-08-06 14:10:27,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-08-06 14:10:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-08-06 14:10:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4686785550983084) internal successors, (5399), 2187 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-08-06 14:10:27,671 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-08-06 14:10:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:27,671 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-08-06 14:10:27,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-08-06 14:10:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 14:10:27,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:27,674 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:27,701 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 14:10:27,874 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,SelfDestructingSolverStorable114 [2021-08-06 14:10:27,874 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:27,874 INFO L82 PathProgramCache]: Analyzing trace with hash 237519579, now seen corresponding path program 40 times [2021-08-06 14:10:27,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:27,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370554495] [2021-08-06 14:10:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:27,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:27,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:27,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370554495] [2021-08-06 14:10:27,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370554495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:27,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039111590] [2021-08-06 14:10:27,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:10:27,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:27,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:27,947 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 14:10:27,948 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 14:10:29,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:10:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:29,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:10:29,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:30,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039111590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:30,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:30,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-08-06 14:10:30,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599685268] [2021-08-06 14:10:30,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:10:30,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:10:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:30,146 INFO L87 Difference]: Start difference. First operand 2188 states and 5399 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:30,944 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-08-06 14:10:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:10:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 14:10:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:30,949 INFO L225 Difference]: With dead ends: 3588 [2021-08-06 14:10:30,950 INFO L226 Difference]: Without dead ends: 3550 [2021-08-06 14:10:30,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:10:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-08-06 14:10:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-08-06 14:10:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.43500194024059) internal successors, (6275), 2577 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-08-06 14:10:30,985 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-08-06 14:10:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:30,985 INFO L470 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-08-06 14:10:30,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-08-06 14:10:30,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 14:10:30,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:30,987 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:31,010 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 14:10:31,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:31,189 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:31,189 INFO L82 PathProgramCache]: Analyzing trace with hash 207335165, now seen corresponding path program 41 times [2021-08-06 14:10:31,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:31,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276626362] [2021-08-06 14:10:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:31,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:10:31,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:31,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276626362] [2021-08-06 14:10:31,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276626362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:31,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747994613] [2021-08-06 14:10:31,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:10:31,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:31,261 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 14:10:31,304 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 14:10:33,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:10:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:33,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:10:33,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747994613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:33,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:33,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 14:10:33,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976378149] [2021-08-06 14:10:33,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:10:33,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:33,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:10:33,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:10:33,318 INFO L87 Difference]: Start difference. First operand 2578 states and 6275 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 14:10:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:33,464 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-08-06 14:10:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:10:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 38 [2021-08-06 14:10:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:33,469 INFO L225 Difference]: With dead ends: 3224 [2021-08-06 14:10:33,469 INFO L226 Difference]: Without dead ends: 3189 [2021-08-06 14:10:33,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:10:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-08-06 14:10:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-08-06 14:10:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.4572992700729928) internal successors, (6733), 2740 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-08-06 14:10:33,501 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-08-06 14:10:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:33,502 INFO L470 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-08-06 14:10:33,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 14:10:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-08-06 14:10:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 14:10:33,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:33,504 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:33,525 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 14:10:33,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:33,705 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1863963929, now seen corresponding path program 42 times [2021-08-06 14:10:33,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:33,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161176809] [2021-08-06 14:10:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:33,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:10:33,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:33,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161176809] [2021-08-06 14:10:33,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161176809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:33,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886023475] [2021-08-06 14:10:33,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:10:33,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:33,775 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 14:10:33,776 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 14:10:35,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 14:10:35,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:10:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:10:35,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886023475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:35,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:35,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-06 14:10:35,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990599208] [2021-08-06 14:10:35,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:10:35,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:10:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:10:35,959 INFO L87 Difference]: Start difference. First operand 2741 states and 6733 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:36,529 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-08-06 14:10:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:10:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 14:10:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:36,537 INFO L225 Difference]: With dead ends: 4464 [2021-08-06 14:10:36,537 INFO L226 Difference]: Without dead ends: 4401 [2021-08-06 14:10:36,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:10:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-08-06 14:10:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-08-06 14:10:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 2.4787270840539604) internal successors, (7166), 2891 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-08-06 14:10:36,584 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-08-06 14:10:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:36,584 INFO L470 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-08-06 14:10:36,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-08-06 14:10:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 14:10:36,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:36,587 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:36,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 14:10:36,788 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,SelfDestructingSolverStorable117 [2021-08-06 14:10:36,788 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash 254200473, now seen corresponding path program 43 times [2021-08-06 14:10:36,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:36,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903477300] [2021-08-06 14:10:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:36,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:10:36,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:36,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903477300] [2021-08-06 14:10:36,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903477300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:36,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901998533] [2021-08-06 14:10:36,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:36,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:36,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:36,865 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 14:10:36,866 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 14:10:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:10:38,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901998533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:38,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:38,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 14:10:38,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975338396] [2021-08-06 14:10:38,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:10:38,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:38,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:10:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:10:38,966 INFO L87 Difference]: Start difference. First operand 2892 states and 7166 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:39,098 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-08-06 14:10:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:10:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 14:10:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:39,103 INFO L225 Difference]: With dead ends: 3617 [2021-08-06 14:10:39,103 INFO L226 Difference]: Without dead ends: 3592 [2021-08-06 14:10:39,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:10:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-08-06 14:10:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-08-06 14:10:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 2.4697542533081287) internal successors, (7839), 3174 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-08-06 14:10:39,139 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-08-06 14:10:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:39,139 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-08-06 14:10:39,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-08-06 14:10:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:10:39,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:39,142 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:39,165 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 14:10:39,342 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,SelfDestructingSolverStorable118 [2021-08-06 14:10:39,343 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1532856280, now seen corresponding path program 17 times [2021-08-06 14:10:39,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:39,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199203778] [2021-08-06 14:10:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:39,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:39,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:39,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199203778] [2021-08-06 14:10:39,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199203778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:39,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246252003] [2021-08-06 14:10:39,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:10:39,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:39,454 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 14:10:39,455 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 14:10:41,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:10:41,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:10:41,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:41,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246252003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:41,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:41,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:10:41,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458351509] [2021-08-06 14:10:41,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:10:41,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:10:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:10:41,519 INFO L87 Difference]: Start difference. First operand 3175 states and 7839 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:41,983 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-08-06 14:10:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:10:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:10:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:41,989 INFO L225 Difference]: With dead ends: 4225 [2021-08-06 14:10:41,990 INFO L226 Difference]: Without dead ends: 4189 [2021-08-06 14:10:41,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:10:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-08-06 14:10:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-08-06 14:10:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.480051897502433) internal successors, (7646), 3083 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-08-06 14:10:42,032 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-08-06 14:10:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:42,032 INFO L470 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-08-06 14:10:42,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-08-06 14:10:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:10:42,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:42,035 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:42,059 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 14:10:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:42,235 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1309554728, now seen corresponding path program 44 times [2021-08-06 14:10:42,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:42,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713697660] [2021-08-06 14:10:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:42,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:42,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:42,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713697660] [2021-08-06 14:10:42,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713697660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:42,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606248925] [2021-08-06 14:10:42,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:10:42,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:42,379 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 14:10:42,380 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 14:10:44,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:10:44,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:10:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:44,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606248925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:44,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:44,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:10:44,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760519337] [2021-08-06 14:10:44,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:10:44,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:10:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:44,722 INFO L87 Difference]: Start difference. First operand 3084 states and 7646 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 14:10:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:45,380 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-08-06 14:10:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 41 [2021-08-06 14:10:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:45,385 INFO L225 Difference]: With dead ends: 3304 [2021-08-06 14:10:45,385 INFO L226 Difference]: Without dead ends: 3236 [2021-08-06 14:10:45,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-08-06 14:10:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-08-06 14:10:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.474862147259163) internal successors, (7630), 3083 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-08-06 14:10:45,429 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-08-06 14:10:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:45,429 INFO L470 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-08-06 14:10:45,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 14:10:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-08-06 14:10:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:10:45,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:45,433 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:45,461 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 14:10:45,633 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,SelfDestructingSolverStorable120 [2021-08-06 14:10:45,634 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:45,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1255677656, now seen corresponding path program 45 times [2021-08-06 14:10:45,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:45,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881105318] [2021-08-06 14:10:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:45,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:45,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:45,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881105318] [2021-08-06 14:10:45,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881105318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:45,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318054383] [2021-08-06 14:10:45,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:10:45,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:45,738 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 14:10:45,738 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 14:10:47,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:10:47,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:10:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:47,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318054383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:47,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:47,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:10:47,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420765734] [2021-08-06 14:10:47,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:10:47,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:10:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:10:47,997 INFO L87 Difference]: Start difference. First operand 3084 states and 7630 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:48,213 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-08-06 14:10:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:10:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:48,218 INFO L225 Difference]: With dead ends: 3450 [2021-08-06 14:10:48,218 INFO L226 Difference]: Without dead ends: 3450 [2021-08-06 14:10:48,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:10:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-08-06 14:10:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-08-06 14:10:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.477221324717286) internal successors, (7667), 3095 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-08-06 14:10:48,252 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-08-06 14:10:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:48,252 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-08-06 14:10:48,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:48,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-08-06 14:10:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:10:48,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:48,255 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:48,285 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 14:10:48,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:48,456 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 482486773, now seen corresponding path program 18 times [2021-08-06 14:10:48,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:48,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567478293] [2021-08-06 14:10:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:48,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:48,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:48,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567478293] [2021-08-06 14:10:48,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567478293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:48,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183721474] [2021-08-06 14:10:48,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:10:48,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:48,603 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 14:10:48,604 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 14:10:50,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:10:50,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:10:50,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183721474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:51,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:51,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-08-06 14:10:51,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098083115] [2021-08-06 14:10:51,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:51,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:51,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:51,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:51,029 INFO L87 Difference]: Start difference. First operand 3096 states and 7667 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:51,291 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-08-06 14:10:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:10:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:10:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:51,297 INFO L225 Difference]: With dead ends: 4321 [2021-08-06 14:10:51,297 INFO L226 Difference]: Without dead ends: 4263 [2021-08-06 14:10:51,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:10:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-08-06 14:10:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-08-06 14:10:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 2.4902747761654833) internal successors, (8066), 3239 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-08-06 14:10:51,343 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-08-06 14:10:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:51,343 INFO L470 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-08-06 14:10:51,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-08-06 14:10:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:10:51,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:51,346 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:51,376 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 14:10:51,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 14:10:51,547 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash -173209317, now seen corresponding path program 19 times [2021-08-06 14:10:51,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:51,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312797665] [2021-08-06 14:10:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:51,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:51,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:51,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312797665] [2021-08-06 14:10:51,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312797665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:51,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714401860] [2021-08-06 14:10:51,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:51,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:51,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:51,648 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 14:10:51,649 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 14:10:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:53,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:10:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:53,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714401860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:53,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:53,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:10:53,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925132098] [2021-08-06 14:10:53,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:10:53,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:10:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:53,995 INFO L87 Difference]: Start difference. First operand 3240 states and 8066 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:10:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:54,147 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-08-06 14:10:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:10:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 41 [2021-08-06 14:10:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:54,155 INFO L225 Difference]: With dead ends: 4797 [2021-08-06 14:10:54,155 INFO L226 Difference]: Without dead ends: 4797 [2021-08-06 14:10:54,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:10:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-08-06 14:10:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-08-06 14:10:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.5265423242467717) internal successors, (8805), 3485 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-08-06 14:10:54,215 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-08-06 14:10:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:54,215 INFO L470 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-08-06 14:10:54,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:10:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-08-06 14:10:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:10:54,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:54,220 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:54,251 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 14:10:54,420 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,SelfDestructingSolverStorable123 [2021-08-06 14:10:54,421 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash -707074693, now seen corresponding path program 46 times [2021-08-06 14:10:54,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:54,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915968586] [2021-08-06 14:10:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:54,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:54,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:54,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915968586] [2021-08-06 14:10:54,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915968586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:54,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089934425] [2021-08-06 14:10:54,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:10:54,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:54,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:54,521 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 14:10:54,522 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 14:10:56,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:10:56,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:56,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:10:56,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:56,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089934425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:56,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:56,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:10:56,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782192131] [2021-08-06 14:10:56,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:10:56,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:10:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:10:56,933 INFO L87 Difference]: Start difference. First operand 3486 states and 8805 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 14:10:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:57,081 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-08-06 14:10:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:10:57,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 41 [2021-08-06 14:10:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:57,087 INFO L225 Difference]: With dead ends: 3733 [2021-08-06 14:10:57,087 INFO L226 Difference]: Without dead ends: 3727 [2021-08-06 14:10:57,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:10:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-08-06 14:10:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-08-06 14:10:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 2.5194428322692977) internal successors, (8682), 3446 states have internal predecessors, (8682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-08-06 14:10:57,132 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-08-06 14:10:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:57,132 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-08-06 14:10:57,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 14:10:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-08-06 14:10:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:10:57,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:57,136 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:57,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:57,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 14:10:57,353 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:10:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:57,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1766490874, now seen corresponding path program 20 times [2021-08-06 14:10:57,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:57,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660784130] [2021-08-06 14:10:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:57,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:10:57,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:57,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660784130] [2021-08-06 14:10:57,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660784130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:57,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214931905] [2021-08-06 14:10:57,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:10:57,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:57,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:57,473 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 14:10:57,473 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 14:10:59,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:10:59,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:10:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:10:59,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214931905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:59,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:59,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:10:59,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300530200] [2021-08-06 14:10:59,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:10:59,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:59,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:10:59,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:10:59,847 INFO L87 Difference]: Start difference. First operand 3447 states and 8682 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:00,156 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-08-06 14:11:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:00,163 INFO L225 Difference]: With dead ends: 4309 [2021-08-06 14:11:00,164 INFO L226 Difference]: Without dead ends: 4278 [2021-08-06 14:11:00,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-08-06 14:11:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-08-06 14:11:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 2.5160183066361554) internal successors, (8796), 3496 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-08-06 14:11:00,221 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-08-06 14:11:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:00,221 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-08-06 14:11:00,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-08-06 14:11:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:00,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:00,226 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:00,248 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 14:11:00,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 14:11:00,427 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 974779565, now seen corresponding path program 47 times [2021-08-06 14:11:00,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:00,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127871408] [2021-08-06 14:11:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:00,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:00,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:00,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127871408] [2021-08-06 14:11:00,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127871408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:00,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188265899] [2021-08-06 14:11:00,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:11:00,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:00,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:00,528 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 14:11:00,528 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 14:11:02,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:11:02,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:02,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188265899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:02,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:02,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-08-06 14:11:02,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518287697] [2021-08-06 14:11:02,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:11:02,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:02,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:11:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:02,972 INFO L87 Difference]: Start difference. First operand 3497 states and 8796 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 14:11:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:03,194 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-08-06 14:11:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:11:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 41 [2021-08-06 14:11:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:03,202 INFO L225 Difference]: With dead ends: 4421 [2021-08-06 14:11:03,202 INFO L226 Difference]: Without dead ends: 4412 [2021-08-06 14:11:03,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:11:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-08-06 14:11:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-08-06 14:11:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5312325711098715) internal successors, (9077), 3586 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-08-06 14:11:03,270 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-08-06 14:11:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:03,270 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-08-06 14:11:03,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 14:11:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-08-06 14:11:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:03,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:03,276 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:03,309 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 14:11:03,492 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,SelfDestructingSolverStorable126 [2021-08-06 14:11:03,493 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:03,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1181842131, now seen corresponding path program 48 times [2021-08-06 14:11:03,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:03,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590012821] [2021-08-06 14:11:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:03,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:03,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:03,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590012821] [2021-08-06 14:11:03,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590012821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:03,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898197506] [2021-08-06 14:11:03,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:11:03,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:03,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:03,596 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 14:11:03,596 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 14:11:05,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:11:05,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:11:06,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898197506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:06,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:06,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:11:06,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525807756] [2021-08-06 14:11:06,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:11:06,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:11:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:11:06,100 INFO L87 Difference]: Start difference. First operand 3587 states and 9077 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:06,282 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-08-06 14:11:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:11:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:06,291 INFO L225 Difference]: With dead ends: 4253 [2021-08-06 14:11:06,292 INFO L226 Difference]: Without dead ends: 4235 [2021-08-06 14:11:06,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-08-06 14:11:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-08-06 14:11:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5284439486893473) internal successors, (9067), 3586 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-08-06 14:11:06,356 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-08-06 14:11:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:06,356 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-08-06 14:11:06,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-08-06 14:11:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:06,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:06,361 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:06,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 14:11:06,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 14:11:06,581 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:06,581 INFO L82 PathProgramCache]: Analyzing trace with hash -266157882, now seen corresponding path program 49 times [2021-08-06 14:11:06,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:06,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669003873] [2021-08-06 14:11:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:06,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:06,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:06,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669003873] [2021-08-06 14:11:06,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669003873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:06,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739718163] [2021-08-06 14:11:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:11:06,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:06,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:06,692 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 14:11:06,693 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 14:11:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:09,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739718163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:09,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:09,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:11:09,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205821984] [2021-08-06 14:11:09,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:11:09,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:11:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:11:09,184 INFO L87 Difference]: Start difference. First operand 3587 states and 9067 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:09,504 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-08-06 14:11:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:09,510 INFO L225 Difference]: With dead ends: 4054 [2021-08-06 14:11:09,510 INFO L226 Difference]: Without dead ends: 4016 [2021-08-06 14:11:09,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-08-06 14:11:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-08-06 14:11:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 2.525055679287305) internal successors, (9070), 3592 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-08-06 14:11:09,552 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-08-06 14:11:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:09,552 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-08-06 14:11:09,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-08-06 14:11:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:09,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:09,555 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:09,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 14:11:09,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 14:11:09,756 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:09,756 INFO L82 PathProgramCache]: Analyzing trace with hash -879694062, now seen corresponding path program 50 times [2021-08-06 14:11:09,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:09,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487409640] [2021-08-06 14:11:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:09,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:11:09,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:09,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487409640] [2021-08-06 14:11:09,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487409640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:09,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130835434] [2021-08-06 14:11:09,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:11:09,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:09,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:09,867 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 14:11:09,868 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 14:11:12,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:11:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:11:12,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130835434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:12,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:12,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:11:12,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991170044] [2021-08-06 14:11:12,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:11:12,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:11:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:11:12,365 INFO L87 Difference]: Start difference. First operand 3593 states and 9070 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 14:11:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:12,646 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-08-06 14:11:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 41 [2021-08-06 14:11:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:12,652 INFO L225 Difference]: With dead ends: 4259 [2021-08-06 14:11:12,652 INFO L226 Difference]: Without dead ends: 4247 [2021-08-06 14:11:12,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:12,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-08-06 14:11:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-08-06 14:11:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 2.5242070116861437) internal successors, (9072), 3594 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-08-06 14:11:12,699 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-08-06 14:11:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:12,699 INFO L470 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-08-06 14:11:12,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 14:11:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-08-06 14:11:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:12,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:12,703 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:12,732 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 14:11:12,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:12,903 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:12,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1262223272, now seen corresponding path program 51 times [2021-08-06 14:11:12,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:12,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266043559] [2021-08-06 14:11:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:12,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:13,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:13,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266043559] [2021-08-06 14:11:13,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266043559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:13,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346365400] [2021-08-06 14:11:13,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:11:13,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:13,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:13,007 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 14:11:13,007 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 14:11:15,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 14:11:15,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:15,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:15,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346365400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:15,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:15,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:11:15,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474787796] [2021-08-06 14:11:15,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:11:15,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:11:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:11:15,448 INFO L87 Difference]: Start difference. First operand 3595 states and 9072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:15,772 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-08-06 14:11:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:11:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:15,780 INFO L225 Difference]: With dead ends: 4613 [2021-08-06 14:11:15,780 INFO L226 Difference]: Without dead ends: 4601 [2021-08-06 14:11:15,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:11:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-08-06 14:11:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-08-06 14:11:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.5230726720088423) internal successors, (9131), 3619 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-08-06 14:11:15,827 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-08-06 14:11:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:15,827 INFO L470 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-08-06 14:11:15,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-08-06 14:11:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:15,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:15,830 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:15,856 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 14:11:16,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:16,031 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1024161755, now seen corresponding path program 21 times [2021-08-06 14:11:16,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:16,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196055682] [2021-08-06 14:11:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:16,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:16,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:16,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196055682] [2021-08-06 14:11:16,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196055682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:16,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576049065] [2021-08-06 14:11:16,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:11:16,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:16,125 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 14:11:16,126 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 14:11:18,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:11:18,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:18,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576049065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:18,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:18,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:11:18,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278921659] [2021-08-06 14:11:18,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:11:18,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:11:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:11:18,433 INFO L87 Difference]: Start difference. First operand 3620 states and 9131 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:18,586 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-08-06 14:11:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 41 [2021-08-06 14:11:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:18,593 INFO L225 Difference]: With dead ends: 4855 [2021-08-06 14:11:18,593 INFO L226 Difference]: Without dead ends: 4847 [2021-08-06 14:11:18,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-08-06 14:11:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-08-06 14:11:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 2.537720706260032) internal successors, (9486), 3738 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-08-06 14:11:18,644 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-08-06 14:11:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:18,644 INFO L470 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-08-06 14:11:18,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-08-06 14:11:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:18,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:18,648 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:18,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 14:11:18,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:18,849 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 402281345, now seen corresponding path program 22 times [2021-08-06 14:11:18,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:18,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758693379] [2021-08-06 14:11:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:18,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:18,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:18,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758693379] [2021-08-06 14:11:18,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758693379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:18,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256865000] [2021-08-06 14:11:18,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:11:18,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:18,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:18,944 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 14:11:18,944 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 14:11:21,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:11:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:21,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256865000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:21,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:21,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:11:21,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173443508] [2021-08-06 14:11:21,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:11:21,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:11:21,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:11:21,314 INFO L87 Difference]: Start difference. First operand 3739 states and 9486 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:21,483 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-08-06 14:11:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:21,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 41 [2021-08-06 14:11:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:21,491 INFO L225 Difference]: With dead ends: 5507 [2021-08-06 14:11:21,491 INFO L226 Difference]: Without dead ends: 5507 [2021-08-06 14:11:21,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-08-06 14:11:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-08-06 14:11:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 2.536962903656258) internal successors, (9506), 3747 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-08-06 14:11:21,546 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-08-06 14:11:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:21,546 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-08-06 14:11:21,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-08-06 14:11:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:21,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:21,550 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:21,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 14:11:21,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:21,765 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1235291111, now seen corresponding path program 23 times [2021-08-06 14:11:21,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:21,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33466937] [2021-08-06 14:11:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:21,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:21,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:21,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33466937] [2021-08-06 14:11:21,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33466937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:21,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507619642] [2021-08-06 14:11:21,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:11:21,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:21,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:21,887 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 14:11:21,888 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 14:11:24,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:11:24,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:24,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:24,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:24,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507619642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:24,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:24,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-08-06 14:11:24,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243827259] [2021-08-06 14:11:24,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:11:24,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:11:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:11:24,379 INFO L87 Difference]: Start difference. First operand 3748 states and 9506 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:24,657 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-08-06 14:11:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:11:24,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:24,664 INFO L225 Difference]: With dead ends: 5032 [2021-08-06 14:11:24,664 INFO L226 Difference]: Without dead ends: 5032 [2021-08-06 14:11:24,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:11:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-08-06 14:11:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-08-06 14:11:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.521629919062238) internal successors, (9035), 3583 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-08-06 14:11:24,749 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-08-06 14:11:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:24,749 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-08-06 14:11:24,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-08-06 14:11:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:24,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:24,753 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:24,785 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 14:11:24,953 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,SelfDestructingSolverStorable133 [2021-08-06 14:11:24,953 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1500184915, now seen corresponding path program 52 times [2021-08-06 14:11:24,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:24,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382892217] [2021-08-06 14:11:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:24,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:25,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:25,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382892217] [2021-08-06 14:11:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382892217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:25,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088915713] [2021-08-06 14:11:25,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:11:25,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:25,052 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 14:11:25,053 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 14:11:27,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:11:27,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:27,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088915713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:27,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:27,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:11:27,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22597314] [2021-08-06 14:11:27,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:11:27,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:27,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:11:27,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:11:27,448 INFO L87 Difference]: Start difference. First operand 3584 states and 9035 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:11:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:27,601 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-08-06 14:11:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:27,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 41 [2021-08-06 14:11:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:27,607 INFO L225 Difference]: With dead ends: 4100 [2021-08-06 14:11:27,608 INFO L226 Difference]: Without dead ends: 4082 [2021-08-06 14:11:27,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:11:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-08-06 14:11:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-08-06 14:11:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.520234440413062) internal successors, (9030), 3583 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-08-06 14:11:27,654 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-08-06 14:11:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:27,654 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-08-06 14:11:27,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:11:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-08-06 14:11:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:27,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:27,658 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:27,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 14:11:27,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 14:11:27,858 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1686786410, now seen corresponding path program 24 times [2021-08-06 14:11:27,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:27,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850561980] [2021-08-06 14:11:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:27,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:27,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:27,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850561980] [2021-08-06 14:11:27,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850561980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:27,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868944805] [2021-08-06 14:11:27,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:11:27,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:27,962 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 14:11:27,962 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 14:11:30,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 14:11:30,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:30,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868944805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:30,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:30,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:11:30,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486969164] [2021-08-06 14:11:30,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:11:30,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:11:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:11:30,400 INFO L87 Difference]: Start difference. First operand 3584 states and 9030 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:30,663 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-08-06 14:11:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:30,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:30,669 INFO L225 Difference]: With dead ends: 4419 [2021-08-06 14:11:30,669 INFO L226 Difference]: Without dead ends: 4397 [2021-08-06 14:11:30,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-08-06 14:11:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-08-06 14:11:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5206314040432014) internal successors, (9102), 3611 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-08-06 14:11:30,711 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-08-06 14:11:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:30,711 INFO L470 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-08-06 14:11:30,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-08-06 14:11:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:30,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:30,714 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:30,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 14:11:30,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:11:30,915 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:30,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1107847894, now seen corresponding path program 53 times [2021-08-06 14:11:30,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:30,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319118177] [2021-08-06 14:11:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:30,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:31,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:31,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319118177] [2021-08-06 14:11:31,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319118177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:31,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716041767] [2021-08-06 14:11:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:11:31,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:31,020 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 14:11:31,021 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 14:11:33,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 14:11:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:33,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:33,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:33,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716041767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:33,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:33,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:11:33,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039878488] [2021-08-06 14:11:33,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:11:33,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:11:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:11:33,434 INFO L87 Difference]: Start difference. First operand 3612 states and 9102 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:33,755 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-08-06 14:11:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:33,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:33,761 INFO L225 Difference]: With dead ends: 4113 [2021-08-06 14:11:33,762 INFO L226 Difference]: Without dead ends: 4057 [2021-08-06 14:11:33,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-08-06 14:11:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-08-06 14:11:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 2.51456844420011) internal successors, (9148), 3638 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-08-06 14:11:33,803 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-08-06 14:11:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:33,803 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-08-06 14:11:33,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-08-06 14:11:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:33,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:33,806 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:33,828 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 14:11:34,007 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,SelfDestructingSolverStorable136 [2021-08-06 14:11:34,007 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:34,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1721384074, now seen corresponding path program 54 times [2021-08-06 14:11:34,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:34,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460173010] [2021-08-06 14:11:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:34,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:11:34,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:34,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460173010] [2021-08-06 14:11:34,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460173010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:34,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100369772] [2021-08-06 14:11:34,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:11:34,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:34,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:34,115 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 14:11:34,116 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 14:11:36,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 14:11:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:36,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:11:36,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100369772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:36,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:36,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:11:36,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599158798] [2021-08-06 14:11:36,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:11:36,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:36,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:11:36,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:11:36,612 INFO L87 Difference]: Start difference. First operand 3639 states and 9148 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 14:11:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:36,857 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-08-06 14:11:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:36,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 41 [2021-08-06 14:11:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:36,863 INFO L225 Difference]: With dead ends: 4375 [2021-08-06 14:11:36,863 INFO L226 Difference]: Without dead ends: 4363 [2021-08-06 14:11:36,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-08-06 14:11:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-08-06 14:11:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 2.513157894736842) internal successors, (9168), 3648 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-08-06 14:11:36,907 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-08-06 14:11:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:36,907 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-08-06 14:11:36,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 14:11:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-08-06 14:11:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:36,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:36,910 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:36,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 14:11:37,110 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,SelfDestructingSolverStorable137 [2021-08-06 14:11:37,111 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:37,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1878683561, now seen corresponding path program 25 times [2021-08-06 14:11:37,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:37,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095278732] [2021-08-06 14:11:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:37,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:37,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:37,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095278732] [2021-08-06 14:11:37,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095278732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:37,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409885930] [2021-08-06 14:11:37,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:11:37,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:37,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:37,211 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 14:11:37,211 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 14:11:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:39,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409885930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:39,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:39,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:11:39,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254256627] [2021-08-06 14:11:39,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:11:39,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:11:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:11:39,833 INFO L87 Difference]: Start difference. First operand 3649 states and 9168 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:40,021 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-08-06 14:11:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 41 [2021-08-06 14:11:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:40,028 INFO L225 Difference]: With dead ends: 4653 [2021-08-06 14:11:40,028 INFO L226 Difference]: Without dead ends: 4643 [2021-08-06 14:11:40,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:11:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-08-06 14:11:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-08-06 14:11:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.5172964342735495) internal successors, (9460), 3758 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-08-06 14:11:40,086 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-08-06 14:11:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:40,086 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-08-06 14:11:40,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-08-06 14:11:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:40,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:40,091 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:40,113 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 14:11:40,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:40,291 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash 925225719, now seen corresponding path program 55 times [2021-08-06 14:11:40,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:40,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94960895] [2021-08-06 14:11:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:40,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:40,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:40,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94960895] [2021-08-06 14:11:40,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94960895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:40,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033402487] [2021-08-06 14:11:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:11:40,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:40,398 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 14:11:40,399 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 14:11:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:42,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033402487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:43,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:43,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:11:43,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324650357] [2021-08-06 14:11:43,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:11:43,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:43,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:11:43,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:11:43,174 INFO L87 Difference]: Start difference. First operand 3759 states and 9460 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:11:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:43,347 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-08-06 14:11:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:11:43,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 41 [2021-08-06 14:11:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:43,353 INFO L225 Difference]: With dead ends: 4425 [2021-08-06 14:11:43,353 INFO L226 Difference]: Without dead ends: 4407 [2021-08-06 14:11:43,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:11:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-08-06 14:11:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-08-06 14:11:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 2.5124165554072095) internal successors, (9409), 3745 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-08-06 14:11:43,401 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-08-06 14:11:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:43,402 INFO L470 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-08-06 14:11:43,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:11:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-08-06 14:11:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:43,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:43,405 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:43,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-06 14:11:43,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:43,606 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:43,606 INFO L82 PathProgramCache]: Analyzing trace with hash 420533260, now seen corresponding path program 56 times [2021-08-06 14:11:43,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:43,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200308003] [2021-08-06 14:11:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:43,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:43,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:43,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200308003] [2021-08-06 14:11:43,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200308003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:43,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202409865] [2021-08-06 14:11:43,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:11:43,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:43,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:43,710 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:43,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:11:46,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:11:46,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:46,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:11:46,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202409865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:46,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:46,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:11:46,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295497275] [2021-08-06 14:11:46,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:11:46,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:46,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:11:46,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:11:46,513 INFO L87 Difference]: Start difference. First operand 3746 states and 9409 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:46,857 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-08-06 14:11:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:11:46,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:46,864 INFO L225 Difference]: With dead ends: 5163 [2021-08-06 14:11:46,864 INFO L226 Difference]: Without dead ends: 5121 [2021-08-06 14:11:46,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-08-06 14:11:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-08-06 14:11:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.5132766861391396) internal successors, (9465), 3766 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-08-06 14:11:46,922 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-08-06 14:11:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:46,922 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-08-06 14:11:46,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-08-06 14:11:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:46,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:46,926 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:46,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 14:11:47,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:47,127 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1953092369, now seen corresponding path program 57 times [2021-08-06 14:11:47,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:47,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181849790] [2021-08-06 14:11:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:47,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:47,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:47,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181849790] [2021-08-06 14:11:47,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181849790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:47,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555475421] [2021-08-06 14:11:47,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:11:47,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:47,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:47,251 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:47,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:11:49,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:11:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:11:50,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555475421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:50,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:50,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:11:50,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269734005] [2021-08-06 14:11:50,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:11:50,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:11:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:11:50,114 INFO L87 Difference]: Start difference. First operand 3767 states and 9465 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:11:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:50,283 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-08-06 14:11:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:11:50,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 41 [2021-08-06 14:11:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:50,289 INFO L225 Difference]: With dead ends: 4453 [2021-08-06 14:11:50,289 INFO L226 Difference]: Without dead ends: 4429 [2021-08-06 14:11:50,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:11:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-08-06 14:11:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-08-06 14:11:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.4991735537190083) internal successors, (9072), 3630 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-08-06 14:11:50,333 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-08-06 14:11:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:50,333 INFO L470 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-08-06 14:11:50,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:11:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-08-06 14:11:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:50,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:50,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:50,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 14:11:50,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:50,537 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:50,537 INFO L82 PathProgramCache]: Analyzing trace with hash 575369794, now seen corresponding path program 58 times [2021-08-06 14:11:50,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:50,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540692170] [2021-08-06 14:11:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:50,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:50,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:50,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540692170] [2021-08-06 14:11:50,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540692170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:50,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63003376] [2021-08-06 14:11:50,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:11:50,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:50,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:50,640 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:50,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:11:53,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:11:53,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:11:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:53,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63003376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:53,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:53,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:11:53,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360340643] [2021-08-06 14:11:53,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:11:53,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:11:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:11:53,475 INFO L87 Difference]: Start difference. First operand 3631 states and 9072 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:53,872 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-08-06 14:11:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:11:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:11:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:53,879 INFO L225 Difference]: With dead ends: 4939 [2021-08-06 14:11:53,880 INFO L226 Difference]: Without dead ends: 4885 [2021-08-06 14:11:53,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:11:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-08-06 14:11:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-08-06 14:11:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 2.493779375172795) internal successors, (9020), 3617 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-08-06 14:11:53,934 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-08-06 14:11:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:53,934 INFO L470 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-08-06 14:11:53,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-08-06 14:11:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:53,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:53,938 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:53,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 14:11:54,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:54,138 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:54,139 INFO L82 PathProgramCache]: Analyzing trace with hash -284572133, now seen corresponding path program 26 times [2021-08-06 14:11:54,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:54,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52567191] [2021-08-06 14:11:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:54,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:54,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:54,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52567191] [2021-08-06 14:11:54,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52567191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:54,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411122509] [2021-08-06 14:11:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:11:54,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:54,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:54,242 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:54,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:11:56,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:11:56,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:11:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411122509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:57,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:11:57,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438693575] [2021-08-06 14:11:57,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:11:57,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:11:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:11:57,135 INFO L87 Difference]: Start difference. First operand 3618 states and 9020 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:57,332 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-08-06 14:11:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:57,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 41 [2021-08-06 14:11:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:57,341 INFO L225 Difference]: With dead ends: 5763 [2021-08-06 14:11:57,341 INFO L226 Difference]: Without dead ends: 5763 [2021-08-06 14:11:57,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:11:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-08-06 14:11:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-08-06 14:11:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.5062128579146408) internal successors, (9278), 3702 states have internal predecessors, (9278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-08-06 14:11:57,403 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-08-06 14:11:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:57,403 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-08-06 14:11:57,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:11:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-08-06 14:11:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:11:57,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:57,407 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:57,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-06 14:11:57,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:57,608 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:11:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1922144589, now seen corresponding path program 27 times [2021-08-06 14:11:57,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:57,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501955164] [2021-08-06 14:11:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:57,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:11:57,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:57,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501955164] [2021-08-06 14:11:57,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501955164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:57,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688004229] [2021-08-06 14:11:57,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:11:57,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:57,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:57,724 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:57,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:12:00,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-06 14:12:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:00,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688004229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:00,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:00,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:12:00,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19838056] [2021-08-06 14:12:00,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:12:00,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:12:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:12:00,663 INFO L87 Difference]: Start difference. First operand 3703 states and 9278 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:12:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:00,939 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-08-06 14:12:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:12:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 41 [2021-08-06 14:12:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:00,949 INFO L225 Difference]: With dead ends: 5686 [2021-08-06 14:12:00,949 INFO L226 Difference]: Without dead ends: 5686 [2021-08-06 14:12:00,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:12:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-08-06 14:12:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-08-06 14:12:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 2.5080688542227003) internal successors, (9325), 3718 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-08-06 14:12:01,020 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-08-06 14:12:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:01,020 INFO L470 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-08-06 14:12:01,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:12:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-08-06 14:12:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:01,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:01,024 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:01,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 14:12:01,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 14:12:01,225 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash 682827543, now seen corresponding path program 28 times [2021-08-06 14:12:01,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:01,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648567042] [2021-08-06 14:12:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:01,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:01,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:01,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648567042] [2021-08-06 14:12:01,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648567042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:01,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9404635] [2021-08-06 14:12:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:12:01,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:01,355 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:01,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:12:03,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:12:03,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9404635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:04,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:04,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 14:12:04,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082563216] [2021-08-06 14:12:04,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:12:04,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:12:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:04,290 INFO L87 Difference]: Start difference. First operand 3719 states and 9325 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:12:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:04,532 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-08-06 14:12:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:12:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 41 [2021-08-06 14:12:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:04,539 INFO L225 Difference]: With dead ends: 4882 [2021-08-06 14:12:04,539 INFO L226 Difference]: Without dead ends: 4882 [2021-08-06 14:12:04,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:12:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-08-06 14:12:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-08-06 14:12:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507887323943662) internal successors, (8903), 3550 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-08-06 14:12:04,588 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-08-06 14:12:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:04,588 INFO L470 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-08-06 14:12:04,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:12:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-08-06 14:12:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:04,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:04,592 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:04,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 14:12:04,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 14:12:04,793 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash 961972471, now seen corresponding path program 59 times [2021-08-06 14:12:04,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:04,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318579858] [2021-08-06 14:12:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:04,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:04,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:04,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318579858] [2021-08-06 14:12:04,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318579858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:04,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487974185] [2021-08-06 14:12:04,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:12:04,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:04,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:04,925 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:04,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:12:07,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:12:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:07,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:07,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:07,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487974185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:07,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:07,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-08-06 14:12:07,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585886903] [2021-08-06 14:12:07,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:12:07,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:07,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:12:07,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:12:07,873 INFO L87 Difference]: Start difference. First operand 3551 states and 8903 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:08,116 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-08-06 14:12:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:12:08,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:12:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:08,122 INFO L225 Difference]: With dead ends: 4193 [2021-08-06 14:12:08,122 INFO L226 Difference]: Without dead ends: 4166 [2021-08-06 14:12:08,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:12:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-08-06 14:12:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-08-06 14:12:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507042253521127) internal successors, (8900), 3550 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-08-06 14:12:08,172 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-08-06 14:12:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:08,172 INFO L470 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-08-06 14:12:08,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-08-06 14:12:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:08,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:08,176 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:08,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 14:12:08,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:12:08,376 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash -427921325, now seen corresponding path program 60 times [2021-08-06 14:12:08,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:08,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425295413] [2021-08-06 14:12:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:08,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:08,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:08,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425295413] [2021-08-06 14:12:08,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425295413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:08,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697563264] [2021-08-06 14:12:08,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:12:08,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:08,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:08,488 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:08,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:12:11,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 14:12:11,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:11,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:12:11,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697563264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:11,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:11,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:12:11,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043339932] [2021-08-06 14:12:11,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:12:11,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:12:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:12:11,298 INFO L87 Difference]: Start difference. First operand 3551 states and 8900 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:11,435 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-08-06 14:12:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:12:11,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:12:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:11,440 INFO L225 Difference]: With dead ends: 4381 [2021-08-06 14:12:11,441 INFO L226 Difference]: Without dead ends: 4363 [2021-08-06 14:12:11,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-08-06 14:12:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-08-06 14:12:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.5019718309859154) internal successors, (8882), 3550 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-08-06 14:12:11,489 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-08-06 14:12:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:11,489 INFO L470 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-08-06 14:12:11,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-08-06 14:12:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:11,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:11,492 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:11,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:11,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 14:12:11,693 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1875921338, now seen corresponding path program 61 times [2021-08-06 14:12:11,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:11,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641064343] [2021-08-06 14:12:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:11,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:11,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:11,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641064343] [2021-08-06 14:12:11,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641064343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:11,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546003356] [2021-08-06 14:12:11,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:12:11,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:11,798 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:11,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:12:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:12:14,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:14,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546003356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:14,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:14,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:12:14,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360326946] [2021-08-06 14:12:14,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:12:14,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:14,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:12:14,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:12:14,521 INFO L87 Difference]: Start difference. First operand 3551 states and 8882 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:14,840 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-08-06 14:12:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:12:14,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:12:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:14,846 INFO L225 Difference]: With dead ends: 4355 [2021-08-06 14:12:14,846 INFO L226 Difference]: Without dead ends: 4156 [2021-08-06 14:12:14,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-08-06 14:12:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-08-06 14:12:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.484126984126984) internal successors, (8764), 3528 states have internal predecessors, (8764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-08-06 14:12:14,887 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-08-06 14:12:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:14,887 INFO L470 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-08-06 14:12:14,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-08-06 14:12:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:14,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:14,890 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:14,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:15,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:15,091 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1805509778, now seen corresponding path program 62 times [2021-08-06 14:12:15,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:15,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853354226] [2021-08-06 14:12:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:15,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:12:15,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:15,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853354226] [2021-08-06 14:12:15,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853354226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:15,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348859641] [2021-08-06 14:12:15,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:12:15,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:15,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:15,196 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:15,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:12:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:12:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:12:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:12:17,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348859641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:17,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:17,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:12:17,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834732889] [2021-08-06 14:12:17,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:12:17,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:12:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:12:17,929 INFO L87 Difference]: Start difference. First operand 3529 states and 8764 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 14:12:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:18,157 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-08-06 14:12:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:12:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 41 [2021-08-06 14:12:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:18,164 INFO L225 Difference]: With dead ends: 4389 [2021-08-06 14:12:18,165 INFO L226 Difference]: Without dead ends: 4377 [2021-08-06 14:12:18,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-08-06 14:12:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-08-06 14:12:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 2.4819444444444443) internal successors, (8935), 3600 states have internal predecessors, (8935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-08-06 14:12:18,219 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-08-06 14:12:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:18,219 INFO L470 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-08-06 14:12:18,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 14:12:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-08-06 14:12:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:18,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:18,223 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:18,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-06 14:12:18,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:18,424 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash -347540184, now seen corresponding path program 63 times [2021-08-06 14:12:18,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:18,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671604516] [2021-08-06 14:12:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:18,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:18,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:18,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671604516] [2021-08-06 14:12:18,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671604516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:18,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464512171] [2021-08-06 14:12:18,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:12:18,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:18,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:18,521 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:18,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 14:12:21,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 14:12:21,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:21,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:12:21,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:21,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464512171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:21,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:21,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:12:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101380917] [2021-08-06 14:12:21,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:12:21,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:12:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:12:21,261 INFO L87 Difference]: Start difference. First operand 3601 states and 8935 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:21,610 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-08-06 14:12:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:12:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:12:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:21,617 INFO L225 Difference]: With dead ends: 5587 [2021-08-06 14:12:21,618 INFO L226 Difference]: Without dead ends: 5533 [2021-08-06 14:12:21,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:12:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-08-06 14:12:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-08-06 14:12:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.4897151898734178) internal successors, (9441), 3792 states have internal predecessors, (9441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-08-06 14:12:21,676 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-08-06 14:12:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:21,676 INFO L470 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-08-06 14:12:21,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-08-06 14:12:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:21,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:21,680 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:21,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-06 14:12:21,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-08-06 14:12:21,880 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:21,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1185018925, now seen corresponding path program 64 times [2021-08-06 14:12:21,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:21,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852764846] [2021-08-06 14:12:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:21,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:21,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:21,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852764846] [2021-08-06 14:12:21,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852764846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:21,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986131097] [2021-08-06 14:12:21,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:12:21,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:21,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:21,991 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:21,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 14:12:24,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:12:24,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:24,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:24,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:24,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986131097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:24,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:24,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:12:24,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810235794] [2021-08-06 14:12:24,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:12:24,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:12:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:12:24,937 INFO L87 Difference]: Start difference. First operand 3793 states and 9441 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:12:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:25,089 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-08-06 14:12:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:12:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 41 [2021-08-06 14:12:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:25,095 INFO L225 Difference]: With dead ends: 4607 [2021-08-06 14:12:25,095 INFO L226 Difference]: Without dead ends: 4583 [2021-08-06 14:12:25,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:12:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-08-06 14:12:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-08-06 14:12:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.485495780590717) internal successors, (9425), 3792 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-08-06 14:12:25,147 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-08-06 14:12:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:25,147 INFO L470 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-08-06 14:12:25,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:12:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-08-06 14:12:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:25,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:25,151 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:25,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-06 14:12:25,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:25,361 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash -192703650, now seen corresponding path program 65 times [2021-08-06 14:12:25,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:25,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132308177] [2021-08-06 14:12:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:25,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:25,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:25,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132308177] [2021-08-06 14:12:25,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132308177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:25,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040596442] [2021-08-06 14:12:25,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:12:25,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:25,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:25,480 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:25,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 14:12:28,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 14:12:28,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:28,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:12:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040596442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:28,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:28,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:12:28,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278160899] [2021-08-06 14:12:28,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:12:28,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:12:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:12:28,563 INFO L87 Difference]: Start difference. First operand 3793 states and 9425 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:29,160 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-08-06 14:12:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:12:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:12:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:29,171 INFO L225 Difference]: With dead ends: 7022 [2021-08-06 14:12:29,172 INFO L226 Difference]: Without dead ends: 6908 [2021-08-06 14:12:29,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:12:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-08-06 14:12:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-08-06 14:12:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.489501644320769) internal successors, (9841), 3953 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-08-06 14:12:29,239 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-08-06 14:12:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:29,239 INFO L470 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-08-06 14:12:29,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-08-06 14:12:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:29,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:29,242 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:29,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:29,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:29,443 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash 193899027, now seen corresponding path program 66 times [2021-08-06 14:12:29,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:29,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236074560] [2021-08-06 14:12:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:29,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:29,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:29,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236074560] [2021-08-06 14:12:29,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236074560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:29,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653330729] [2021-08-06 14:12:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:12:29,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:29,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:29,579 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:29,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 14:12:32,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:12:32,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:32,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:32,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653330729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:32,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:32,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:12:32,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388302510] [2021-08-06 14:12:32,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:12:32,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:12:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:12:32,782 INFO L87 Difference]: Start difference. First operand 3954 states and 9841 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 14:12:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:32,957 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-08-06 14:12:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:12:32,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 41 [2021-08-06 14:12:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:32,964 INFO L225 Difference]: With dead ends: 4805 [2021-08-06 14:12:32,964 INFO L226 Difference]: Without dead ends: 4772 [2021-08-06 14:12:32,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:12:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-08-06 14:12:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-08-06 14:12:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 2.477470355731225) internal successors, (9402), 3795 states have internal predecessors, (9402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-08-06 14:12:33,019 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-08-06 14:12:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:33,019 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-08-06 14:12:33,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 14:12:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-08-06 14:12:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:33,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:33,023 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:33,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 14:12:33,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:33,224 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -252395160, now seen corresponding path program 67 times [2021-08-06 14:12:33,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:33,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956873316] [2021-08-06 14:12:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:33,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:33,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:33,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956873316] [2021-08-06 14:12:33,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956873316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:33,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300805586] [2021-08-06 14:12:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:12:33,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:33,343 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:33,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 14:12:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:12:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:36,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300805586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:36,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:36,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:12:36,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946332105] [2021-08-06 14:12:36,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:12:36,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:12:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:12:36,500 INFO L87 Difference]: Start difference. First operand 3796 states and 9402 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:36,905 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-08-06 14:12:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:12:36,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:12:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:36,912 INFO L225 Difference]: With dead ends: 5143 [2021-08-06 14:12:36,912 INFO L226 Difference]: Without dead ends: 4987 [2021-08-06 14:12:36,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:12:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-08-06 14:12:36,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-08-06 14:12:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.4377063944761335) internal successors, (8120), 3331 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-08-06 14:12:36,958 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-08-06 14:12:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:36,958 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-08-06 14:12:36,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-08-06 14:12:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:36,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:36,960 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:36,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 14:12:37,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:37,173 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:37,173 INFO L82 PathProgramCache]: Analyzing trace with hash -490456677, now seen corresponding path program 29 times [2021-08-06 14:12:37,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:37,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434300180] [2021-08-06 14:12:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:37,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:37,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:37,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434300180] [2021-08-06 14:12:37,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434300180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:37,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750248885] [2021-08-06 14:12:37,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:12:37,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:37,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:37,277 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:37,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 14:12:39,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-06 14:12:39,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:40,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750248885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:40,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:40,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-08-06 14:12:40,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935439551] [2021-08-06 14:12:40,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:12:40,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:12:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:12:40,183 INFO L87 Difference]: Start difference. First operand 3332 states and 8120 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:40,354 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-08-06 14:12:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:12:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:12:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:40,360 INFO L225 Difference]: With dead ends: 4368 [2021-08-06 14:12:40,360 INFO L226 Difference]: Without dead ends: 4354 [2021-08-06 14:12:40,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:12:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-08-06 14:12:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-08-06 14:12:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.4468332364904124) internal successors, (8422), 3442 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-08-06 14:12:40,407 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-08-06 14:12:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:40,407 INFO L470 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-08-06 14:12:40,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-08-06 14:12:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:40,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:40,410 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:40,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-06 14:12:40,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 14:12:40,611 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1112337087, now seen corresponding path program 30 times [2021-08-06 14:12:40,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:40,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924679280] [2021-08-06 14:12:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:40,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:40,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:40,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924679280] [2021-08-06 14:12:40,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924679280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:40,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750692735] [2021-08-06 14:12:40,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:12:40,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:40,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:40,720 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:40,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 14:12:43,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 14:12:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:43,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:43,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750692735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:43,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:43,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:12:43,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012360557] [2021-08-06 14:12:43,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:12:43,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:12:43,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:12:43,639 INFO L87 Difference]: Start difference. First operand 3443 states and 8422 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:12:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:43,840 INFO L93 Difference]: Finished difference Result 5141 states and 11974 transitions. [2021-08-06 14:12:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:12:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 41 [2021-08-06 14:12:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:43,848 INFO L225 Difference]: With dead ends: 5141 [2021-08-06 14:12:43,849 INFO L226 Difference]: Without dead ends: 5141 [2021-08-06 14:12:43,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:12:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2021-08-06 14:12:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 3446. [2021-08-06 14:12:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 2.4473149492017416) internal successors, (8431), 3445 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 8431 transitions. [2021-08-06 14:12:43,899 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 8431 transitions. Word has length 41 [2021-08-06 14:12:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:43,899 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 8431 transitions. [2021-08-06 14:12:43,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 14:12:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 8431 transitions. [2021-08-06 14:12:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:43,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:43,903 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:43,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-06 14:12:44,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-06 14:12:44,103 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1545057753, now seen corresponding path program 31 times [2021-08-06 14:12:44,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:44,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703430651] [2021-08-06 14:12:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:44,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:44,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:44,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703430651] [2021-08-06 14:12:44,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703430651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:44,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059118929] [2021-08-06 14:12:44,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:12:44,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:44,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:44,209 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:44,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 14:12:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:47,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:47,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:47,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059118929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:47,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:47,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:12:47,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273428871] [2021-08-06 14:12:47,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:12:47,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:12:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:12:47,303 INFO L87 Difference]: Start difference. First operand 3446 states and 8431 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:12:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:47,597 INFO L93 Difference]: Finished difference Result 5411 states and 12589 transitions. [2021-08-06 14:12:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:12:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 41 [2021-08-06 14:12:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:47,607 INFO L225 Difference]: With dead ends: 5411 [2021-08-06 14:12:47,607 INFO L226 Difference]: Without dead ends: 5411 [2021-08-06 14:12:47,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:12:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-08-06 14:12:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 3457. [2021-08-06 14:12:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3457 states, 3456 states have (on average 2.4496527777777777) internal successors, (8466), 3456 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3457 states to 3457 states and 8466 transitions. [2021-08-06 14:12:47,675 INFO L78 Accepts]: Start accepts. Automaton has 3457 states and 8466 transitions. Word has length 41 [2021-08-06 14:12:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:47,675 INFO L470 AbstractCegarLoop]: Abstraction has 3457 states and 8466 transitions. [2021-08-06 14:12:47,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:12:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3457 states and 8466 transitions. [2021-08-06 14:12:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:47,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:47,680 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:47,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 14:12:47,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 14:12:47,880 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:47,880 INFO L82 PathProgramCache]: Analyzing trace with hash -144937411, now seen corresponding path program 32 times [2021-08-06 14:12:47,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:47,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373862828] [2021-08-06 14:12:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:47,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:48,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:48,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373862828] [2021-08-06 14:12:48,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373862828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:48,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887596] [2021-08-06 14:12:48,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:12:48,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:48,034 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:48,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 14:12:50,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:12:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:51,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:51,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:51,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 14:12:51,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368802125] [2021-08-06 14:12:51,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:12:51,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:12:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:51,246 INFO L87 Difference]: Start difference. First operand 3457 states and 8466 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:12:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:51,575 INFO L93 Difference]: Finished difference Result 5035 states and 11767 transitions. [2021-08-06 14:12:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:12:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 41 [2021-08-06 14:12:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:51,581 INFO L225 Difference]: With dead ends: 5035 [2021-08-06 14:12:51,581 INFO L226 Difference]: Without dead ends: 5035 [2021-08-06 14:12:51,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:12:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5035 states. [2021-08-06 14:12:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5035 to 3471. [2021-08-06 14:12:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 2.452449567723343) internal successors, (8510), 3470 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 8510 transitions. [2021-08-06 14:12:51,623 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 8510 transitions. Word has length 41 [2021-08-06 14:12:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:51,623 INFO L470 AbstractCegarLoop]: Abstraction has 3471 states and 8510 transitions. [2021-08-06 14:12:51,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:12:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 8510 transitions. [2021-08-06 14:12:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:51,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:51,626 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:51,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 14:12:51,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 14:12:51,827 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:51,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1184224423, now seen corresponding path program 33 times [2021-08-06 14:12:51,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:51,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566323170] [2021-08-06 14:12:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:51,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:51,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:51,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566323170] [2021-08-06 14:12:51,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566323170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:51,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205803267] [2021-08-06 14:12:51,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:12:51,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:51,988 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:51,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 14:12:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 14:12:54,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:54,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205803267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:55,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:55,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 14:12:55,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081136652] [2021-08-06 14:12:55,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:12:55,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:12:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:12:55,349 INFO L87 Difference]: Start difference. First operand 3471 states and 8510 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 14:12:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:55,648 INFO L93 Difference]: Finished difference Result 4408 states and 10365 transitions. [2021-08-06 14:12:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:12:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 41 [2021-08-06 14:12:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:55,655 INFO L225 Difference]: With dead ends: 4408 [2021-08-06 14:12:55,655 INFO L226 Difference]: Without dead ends: 4408 [2021-08-06 14:12:55,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:12:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-08-06 14:12:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3179. [2021-08-06 14:12:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.4389553178099432) internal successors, (7751), 3178 states have internal predecessors, (7751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-08-06 14:12:55,696 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-08-06 14:12:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:55,696 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-08-06 14:12:55,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 14:12:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-08-06 14:12:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:55,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:55,699 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:55,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 14:12:55,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-06 14:12:55,899 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1641177709, now seen corresponding path program 68 times [2021-08-06 14:12:55,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:55,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542799650] [2021-08-06 14:12:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:55,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:56,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:56,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542799650] [2021-08-06 14:12:56,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542799650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:56,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029975465] [2021-08-06 14:12:56,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:12:56,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:56,036 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:56,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 14:12:59,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:12:59,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:12:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:59,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029975465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:59,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:59,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:12:59,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237150316] [2021-08-06 14:12:59,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:12:59,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:12:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:59,402 INFO L87 Difference]: Start difference. First operand 3179 states and 7751 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 14:12:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:59,590 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-08-06 14:12:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:12:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 41 [2021-08-06 14:12:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:59,595 INFO L225 Difference]: With dead ends: 3775 [2021-08-06 14:12:59,595 INFO L226 Difference]: Without dead ends: 3739 [2021-08-06 14:12:59,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:12:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-08-06 14:12:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-08-06 14:12:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 2.4339504235958582) internal successors, (7757), 3187 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-08-06 14:12:59,634 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-08-06 14:12:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:59,634 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-08-06 14:12:59,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 14:12:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-08-06 14:12:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:12:59,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:59,637 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:59,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-06 14:12:59,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:59,838 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:12:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:59,838 INFO L82 PathProgramCache]: Analyzing trace with hash 187740437, now seen corresponding path program 69 times [2021-08-06 14:12:59,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:59,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398953996] [2021-08-06 14:12:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:59,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:12:59,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:59,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398953996] [2021-08-06 14:12:59,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398953996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:59,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910214650] [2021-08-06 14:12:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:12:59,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:59,972 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:59,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 14:13:02,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:13:02,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:13:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:03,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910214650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:03,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:03,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:13:03,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491831452] [2021-08-06 14:13:03,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:13:03,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:13:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:13:03,089 INFO L87 Difference]: Start difference. First operand 3188 states and 7757 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 14:13:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:03,336 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-08-06 14:13:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:13:03,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 41 [2021-08-06 14:13:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:03,342 INFO L225 Difference]: With dead ends: 4138 [2021-08-06 14:13:03,343 INFO L226 Difference]: Without dead ends: 4138 [2021-08-06 14:13:03,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:13:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-08-06 14:13:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-08-06 14:13:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.454717576522562) internal successors, (7779), 3169 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-08-06 14:13:03,382 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-08-06 14:13:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:03,382 INFO L470 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-08-06 14:13:03,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 14:13:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-08-06 14:13:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:03,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:03,385 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:03,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-06 14:13:03,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:03,585 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:03,586 INFO L82 PathProgramCache]: Analyzing trace with hash 880111234, now seen corresponding path program 34 times [2021-08-06 14:13:03,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:03,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324743255] [2021-08-06 14:13:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:03,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:03,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324743255] [2021-08-06 14:13:03,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324743255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806943342] [2021-08-06 14:13:03,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:13:03,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:03,693 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:03,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 14:13:06,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:13:06,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:13:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:06,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806943342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:06,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:06,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:13:06,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752557519] [2021-08-06 14:13:06,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:13:06,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:06,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:13:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:13:06,957 INFO L87 Difference]: Start difference. First operand 3170 states and 7779 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:07,337 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-08-06 14:13:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:13:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:07,343 INFO L225 Difference]: With dead ends: 4257 [2021-08-06 14:13:07,343 INFO L226 Difference]: Without dead ends: 4227 [2021-08-06 14:13:07,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:13:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-08-06 14:13:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-08-06 14:13:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.459442332065906) internal successors, (7762), 3156 states have internal predecessors, (7762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-08-06 14:13:07,394 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-08-06 14:13:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:07,394 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-08-06 14:13:07,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-08-06 14:13:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:07,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:07,397 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:07,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-06 14:13:07,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:07,598 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:07,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:07,598 INFO L82 PathProgramCache]: Analyzing trace with hash 718059138, now seen corresponding path program 70 times [2021-08-06 14:13:07,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:07,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629496606] [2021-08-06 14:13:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:07,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:07,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:07,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629496606] [2021-08-06 14:13:07,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629496606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:07,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358946642] [2021-08-06 14:13:07,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:13:07,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:07,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:07,751 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:07,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 14:13:10,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:13:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:13:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:11,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358946642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:11,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:11,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 14:13:11,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699736489] [2021-08-06 14:13:11,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:13:11,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:11,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:13:11,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:13:11,291 INFO L87 Difference]: Start difference. First operand 3157 states and 7762 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:11,650 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-08-06 14:13:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:13:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:11,655 INFO L225 Difference]: With dead ends: 3218 [2021-08-06 14:13:11,655 INFO L226 Difference]: Without dead ends: 3174 [2021-08-06 14:13:11,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:13:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-08-06 14:13:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-08-06 14:13:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.45659062103929) internal successors, (7753), 3156 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-08-06 14:13:11,700 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-08-06 14:13:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:11,701 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-08-06 14:13:11,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-08-06 14:13:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:11,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:11,704 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:11,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:11,905 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash -697252105, now seen corresponding path program 71 times [2021-08-06 14:13:11,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:11,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506185688] [2021-08-06 14:13:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:11,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:12,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:12,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506185688] [2021-08-06 14:13:12,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506185688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:12,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602496101] [2021-08-06 14:13:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:13:12,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:12,046 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:12,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 14:13:15,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:13:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:13:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:15,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602496101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:15,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:15,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2021-08-06 14:13:15,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821332680] [2021-08-06 14:13:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:13:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:13:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:13:15,584 INFO L87 Difference]: Start difference. First operand 3157 states and 7753 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:15,857 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-08-06 14:13:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:13:15,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:15,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:15,864 INFO L225 Difference]: With dead ends: 4264 [2021-08-06 14:13:15,864 INFO L226 Difference]: Without dead ends: 4264 [2021-08-06 14:13:15,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:13:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-08-06 14:13:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-08-06 14:13:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.489055472263868) internal successors, (8301), 3335 states have internal predecessors, (8301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-08-06 14:13:15,912 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-08-06 14:13:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:15,912 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-08-06 14:13:15,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-08-06 14:13:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:15,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:15,915 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:15,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 14:13:16,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:16,116 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash 856335594, now seen corresponding path program 35 times [2021-08-06 14:13:16,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:16,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255071747] [2021-08-06 14:13:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:16,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:16,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:16,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255071747] [2021-08-06 14:13:16,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255071747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:16,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313241908] [2021-08-06 14:13:16,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:13:16,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:16,229 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:16,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 14:13:19,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:13:19,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:13:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:19,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313241908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:19,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:19,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:13:19,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382966549] [2021-08-06 14:13:19,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:13:19,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:13:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:13:19,508 INFO L87 Difference]: Start difference. First operand 3336 states and 8301 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:19,798 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-08-06 14:13:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:13:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:19,803 INFO L225 Difference]: With dead ends: 4243 [2021-08-06 14:13:19,803 INFO L226 Difference]: Without dead ends: 4243 [2021-08-06 14:13:19,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:13:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-08-06 14:13:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-08-06 14:13:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.495189416716777) internal successors, (8299), 3326 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-08-06 14:13:19,868 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-08-06 14:13:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:19,868 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-08-06 14:13:19,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-08-06 14:13:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:19,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:19,871 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:19,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-06 14:13:20,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-08-06 14:13:20,071 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:20,071 INFO L82 PathProgramCache]: Analyzing trace with hash 679444650, now seen corresponding path program 72 times [2021-08-06 14:13:20,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:20,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892902435] [2021-08-06 14:13:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:20,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:20,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:20,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892902435] [2021-08-06 14:13:20,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892902435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:20,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827305278] [2021-08-06 14:13:20,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:13:20,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:20,198 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:20,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 14:13:23,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:13:23,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:13:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:23,616 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-06 14:13:23,617 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 16 treesize of output 16 [2021-08-06 14:13:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827305278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:23,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-08-06 14:13:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170458509] [2021-08-06 14:13:23,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:13:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:13:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:13:23,719 INFO L87 Difference]: Start difference. First operand 3327 states and 8299 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:24,232 INFO L93 Difference]: Finished difference Result 3905 states and 9346 transitions. [2021-08-06 14:13:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:13:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:24,238 INFO L225 Difference]: With dead ends: 3905 [2021-08-06 14:13:24,238 INFO L226 Difference]: Without dead ends: 3873 [2021-08-06 14:13:24,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:13:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2021-08-06 14:13:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3225. [2021-08-06 14:13:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 2.5189205955334986) internal successors, (8121), 3224 states have internal predecessors, (8121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8121 transitions. [2021-08-06 14:13:24,278 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8121 transitions. Word has length 41 [2021-08-06 14:13:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:24,278 INFO L470 AbstractCegarLoop]: Abstraction has 3225 states and 8121 transitions. [2021-08-06 14:13:24,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8121 transitions. [2021-08-06 14:13:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:24,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:24,281 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:24,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 14:13:24,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:24,485 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1371815447, now seen corresponding path program 36 times [2021-08-06 14:13:24,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:24,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353164193] [2021-08-06 14:13:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:24,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:24,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:24,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353164193] [2021-08-06 14:13:24,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353164193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:24,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385301693] [2021-08-06 14:13:24,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:13:24,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:24,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:24,618 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:24,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 14:13:27,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:13:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:13:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:28,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385301693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:28,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:28,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-08-06 14:13:28,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981320932] [2021-08-06 14:13:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:13:28,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:13:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:13:28,181 INFO L87 Difference]: Start difference. First operand 3225 states and 8121 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:28,390 INFO L93 Difference]: Finished difference Result 3893 states and 9457 transitions. [2021-08-06 14:13:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:13:28,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:28,397 INFO L225 Difference]: With dead ends: 3893 [2021-08-06 14:13:28,397 INFO L226 Difference]: Without dead ends: 3865 [2021-08-06 14:13:28,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:13:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3865 states. [2021-08-06 14:13:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3865 to 3123. [2021-08-06 14:13:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 2.534593209481102) internal successors, (7913), 3122 states have internal predecessors, (7913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 7913 transitions. [2021-08-06 14:13:28,450 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 7913 transitions. Word has length 41 [2021-08-06 14:13:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:28,450 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 7913 transitions. [2021-08-06 14:13:28,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 7913 transitions. [2021-08-06 14:13:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:28,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:28,454 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:28,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-06 14:13:28,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:28,654 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash -875475883, now seen corresponding path program 73 times [2021-08-06 14:13:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:28,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058041251] [2021-08-06 14:13:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:28,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:28,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:28,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058041251] [2021-08-06 14:13:28,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058041251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:28,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919985534] [2021-08-06 14:13:28,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:13:28,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:28,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:28,773 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:28,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 14:13:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:13:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:32,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919985534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:32,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:32,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:13:32,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053636114] [2021-08-06 14:13:32,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:13:32,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:13:32,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:13:32,401 INFO L87 Difference]: Start difference. First operand 3123 states and 7913 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:13:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:32,583 INFO L93 Difference]: Finished difference Result 4139 states and 10113 transitions. [2021-08-06 14:13:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 41 [2021-08-06 14:13:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:32,589 INFO L225 Difference]: With dead ends: 4139 [2021-08-06 14:13:32,590 INFO L226 Difference]: Without dead ends: 4139 [2021-08-06 14:13:32,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:13:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-08-06 14:13:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3325. [2021-08-06 14:13:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3324 states have (on average 2.5643802647412755) internal successors, (8524), 3324 states have internal predecessors, (8524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 8524 transitions. [2021-08-06 14:13:32,635 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 8524 transitions. Word has length 41 [2021-08-06 14:13:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:32,635 INFO L470 AbstractCegarLoop]: Abstraction has 3325 states and 8524 transitions. [2021-08-06 14:13:32,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:13:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 8524 transitions. [2021-08-06 14:13:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:32,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:32,638 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:32,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-06 14:13:32,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-06 14:13:32,838 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1646311550, now seen corresponding path program 37 times [2021-08-06 14:13:32,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:32,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341108870] [2021-08-06 14:13:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:32,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:32,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:32,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341108870] [2021-08-06 14:13:32,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341108870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:32,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974290593] [2021-08-06 14:13:32,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:13:32,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:32,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:32,946 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:32,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 14:13:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:13:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:36,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974290593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:36,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:36,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:13:36,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603558415] [2021-08-06 14:13:36,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:13:36,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:13:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:13:36,552 INFO L87 Difference]: Start difference. First operand 3325 states and 8524 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:36,824 INFO L93 Difference]: Finished difference Result 3891 states and 9712 transitions. [2021-08-06 14:13:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:13:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:36,829 INFO L225 Difference]: With dead ends: 3891 [2021-08-06 14:13:36,829 INFO L226 Difference]: Without dead ends: 3887 [2021-08-06 14:13:36,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:13:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3887 states. [2021-08-06 14:13:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3887 to 3213. [2021-08-06 14:13:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.587173100871731) internal successors, (8310), 3212 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8310 transitions. [2021-08-06 14:13:36,869 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8310 transitions. Word has length 41 [2021-08-06 14:13:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:36,870 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 8310 transitions. [2021-08-06 14:13:36,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8310 transitions. [2021-08-06 14:13:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:36,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:36,872 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:36,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-06 14:13:37,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 14:13:37,073 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1015359362, now seen corresponding path program 74 times [2021-08-06 14:13:37,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:37,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858521921] [2021-08-06 14:13:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:37,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:37,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:37,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858521921] [2021-08-06 14:13:37,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858521921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:37,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964327375] [2021-08-06 14:13:37,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:13:37,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:37,198 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:37,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 14:13:40,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:13:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:40,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:13:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:13:40,529 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-06 14:13:40,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:13:40,531 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:13:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:40,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964327375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:40,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:40,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-06 14:13:40,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353519001] [2021-08-06 14:13:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:13:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:13:40,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:13:40,553 INFO L87 Difference]: Start difference. First operand 3213 states and 8310 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:40,659 INFO L93 Difference]: Finished difference Result 3233 states and 8341 transitions. [2021-08-06 14:13:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:13:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:40,664 INFO L225 Difference]: With dead ends: 3233 [2021-08-06 14:13:40,664 INFO L226 Difference]: Without dead ends: 3213 [2021-08-06 14:13:40,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:13:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-08-06 14:13:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3213. [2021-08-06 14:13:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.586239103362391) internal successors, (8307), 3212 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8307 transitions. [2021-08-06 14:13:40,702 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8307 transitions. Word has length 41 [2021-08-06 14:13:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:40,703 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 8307 transitions. [2021-08-06 14:13:40,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8307 transitions. [2021-08-06 14:13:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:40,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:40,706 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:40,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-06 14:13:40,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-08-06 14:13:40,907 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1228409929, now seen corresponding path program 75 times [2021-08-06 14:13:40,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:40,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721274488] [2021-08-06 14:13:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:40,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:41,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:41,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721274488] [2021-08-06 14:13:41,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721274488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:41,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945021357] [2021-08-06 14:13:41,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:13:41,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:41,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:41,021 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:41,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 14:13:44,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:13:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:13:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:44,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945021357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:44,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:44,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:13:44,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779388236] [2021-08-06 14:13:44,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:13:44,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:13:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:13:44,656 INFO L87 Difference]: Start difference. First operand 3213 states and 8307 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:13:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:44,801 INFO L93 Difference]: Finished difference Result 4352 states and 10749 transitions. [2021-08-06 14:13:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:13:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 41 [2021-08-06 14:13:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:44,809 INFO L225 Difference]: With dead ends: 4352 [2021-08-06 14:13:44,810 INFO L226 Difference]: Without dead ends: 4352 [2021-08-06 14:13:44,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:13:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-08-06 14:13:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3445. [2021-08-06 14:13:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 2.6132404181184667) internal successors, (9000), 3444 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 9000 transitions. [2021-08-06 14:13:44,874 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 9000 transitions. Word has length 41 [2021-08-06 14:13:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:44,874 INFO L470 AbstractCegarLoop]: Abstraction has 3445 states and 9000 transitions. [2021-08-06 14:13:44,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:13:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 9000 transitions. [2021-08-06 14:13:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:44,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:44,878 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:44,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-06 14:13:45,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:45,078 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1466471446, now seen corresponding path program 38 times [2021-08-06 14:13:45,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:45,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264836432] [2021-08-06 14:13:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:45,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:45,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:45,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264836432] [2021-08-06 14:13:45,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264836432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:45,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848905592] [2021-08-06 14:13:45,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:13:45,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:45,201 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:45,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 14:13:48,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:13:48,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:13:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:48,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848905592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:48,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:48,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:13:48,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499077781] [2021-08-06 14:13:48,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:13:48,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:48,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:13:48,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:13:48,894 INFO L87 Difference]: Start difference. First operand 3445 states and 9000 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:49,198 INFO L93 Difference]: Finished difference Result 3941 states and 9975 transitions. [2021-08-06 14:13:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:13:49,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:49,205 INFO L225 Difference]: With dead ends: 3941 [2021-08-06 14:13:49,205 INFO L226 Difference]: Without dead ends: 3933 [2021-08-06 14:13:49,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:13:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2021-08-06 14:13:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3504. [2021-08-06 14:13:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 3503 states have (on average 2.6083357122466455) internal successors, (9137), 3503 states have internal predecessors, (9137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 9137 transitions. [2021-08-06 14:13:49,253 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 9137 transitions. Word has length 41 [2021-08-06 14:13:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:49,253 INFO L470 AbstractCegarLoop]: Abstraction has 3504 states and 9137 transitions. [2021-08-06 14:13:49,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 9137 transitions. [2021-08-06 14:13:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:49,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:49,256 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:49,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-08-06 14:13:49,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-06 14:13:49,456 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:49,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1274798993, now seen corresponding path program 76 times [2021-08-06 14:13:49,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:49,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505061871] [2021-08-06 14:13:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:49,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:49,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:49,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505061871] [2021-08-06 14:13:49,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505061871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:49,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552111030] [2021-08-06 14:13:49,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:13:49,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:49,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:49,551 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:49,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 14:13:52,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:13:52,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:52,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:13:52,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:53,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552111030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:53,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:53,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:13:53,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560435491] [2021-08-06 14:13:53,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:13:53,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:13:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:13:53,241 INFO L87 Difference]: Start difference. First operand 3504 states and 9137 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:13:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:53,357 INFO L93 Difference]: Finished difference Result 4336 states and 10702 transitions. [2021-08-06 14:13:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:13:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 41 [2021-08-06 14:13:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:53,364 INFO L225 Difference]: With dead ends: 4336 [2021-08-06 14:13:53,365 INFO L226 Difference]: Without dead ends: 4333 [2021-08-06 14:13:53,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:13:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-08-06 14:13:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3503. [2021-08-06 14:13:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.6073672187321533) internal successors, (9131), 3502 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9131 transitions. [2021-08-06 14:13:53,432 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9131 transitions. Word has length 41 [2021-08-06 14:13:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:53,432 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 9131 transitions. [2021-08-06 14:13:53,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:13:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9131 transitions. [2021-08-06 14:13:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:53,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:53,435 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:53,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:53,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:53,661 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1481861559, now seen corresponding path program 77 times [2021-08-06 14:13:53,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:53,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252345533] [2021-08-06 14:13:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:53,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:53,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:53,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252345533] [2021-08-06 14:13:53,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252345533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:53,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082574256] [2021-08-06 14:13:53,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:13:53,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:53,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:53,768 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:53,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-06 14:13:57,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:13:57,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:57,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:13:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:13:57,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082574256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:57,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:57,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-08-06 14:13:57,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484908308] [2021-08-06 14:13:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:13:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:13:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:13:57,525 INFO L87 Difference]: Start difference. First operand 3503 states and 9131 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:57,698 INFO L93 Difference]: Finished difference Result 4312 states and 10784 transitions. [2021-08-06 14:13:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:13:57,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:13:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:57,706 INFO L225 Difference]: With dead ends: 4312 [2021-08-06 14:13:57,706 INFO L226 Difference]: Without dead ends: 4300 [2021-08-06 14:13:57,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:13:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2021-08-06 14:13:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 3503. [2021-08-06 14:13:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.606510565391205) internal successors, (9128), 3502 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9128 transitions. [2021-08-06 14:13:57,770 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9128 transitions. Word has length 41 [2021-08-06 14:13:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:57,770 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 9128 transitions. [2021-08-06 14:13:57,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9128 transitions. [2021-08-06 14:13:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:13:57,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:57,774 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:57,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-06 14:13:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:57,975 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:13:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 33861546, now seen corresponding path program 78 times [2021-08-06 14:13:57,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:57,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397841733] [2021-08-06 14:13:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:57,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:58,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:58,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397841733] [2021-08-06 14:13:58,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397841733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:58,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350692654] [2021-08-06 14:13:58,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:13:58,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:58,097 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:58,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-06 14:14:01,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:14:01,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:14:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:01,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350692654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:01,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:01,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:14:01,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830100815] [2021-08-06 14:14:01,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:14:01,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:01,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:14:01,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:14:01,858 INFO L87 Difference]: Start difference. First operand 3503 states and 9128 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:02,165 INFO L93 Difference]: Finished difference Result 3805 states and 9626 transitions. [2021-08-06 14:14:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:14:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:02,172 INFO L225 Difference]: With dead ends: 3805 [2021-08-06 14:14:02,172 INFO L226 Difference]: Without dead ends: 3708 [2021-08-06 14:14:02,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-08-06 14:14:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3409. [2021-08-06 14:14:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3408 states have (on average 2.613556338028169) internal successors, (8907), 3408 states have internal predecessors, (8907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 8907 transitions. [2021-08-06 14:14:02,229 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 8907 transitions. Word has length 41 [2021-08-06 14:14:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:02,229 INFO L470 AbstractCegarLoop]: Abstraction has 3409 states and 8907 transitions. [2021-08-06 14:14:02,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 8907 transitions. [2021-08-06 14:14:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:02,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:02,233 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:02,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-06 14:14:02,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-08-06 14:14:02,433 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash -579674634, now seen corresponding path program 79 times [2021-08-06 14:14:02,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:02,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855109853] [2021-08-06 14:14:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:02,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:14:02,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:02,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855109853] [2021-08-06 14:14:02,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855109853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:02,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722288762] [2021-08-06 14:14:02,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:14:02,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:02,573 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:02,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-06 14:14:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:14:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:14:06,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722288762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:06,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:06,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 14:14:06,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479617219] [2021-08-06 14:14:06,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:14:06,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:14:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:14:06,372 INFO L87 Difference]: Start difference. First operand 3409 states and 8907 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:06,638 INFO L93 Difference]: Finished difference Result 3848 states and 9749 transitions. [2021-08-06 14:14:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:14:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:06,644 INFO L225 Difference]: With dead ends: 3848 [2021-08-06 14:14:06,644 INFO L226 Difference]: Without dead ends: 3836 [2021-08-06 14:14:06,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2021-08-06 14:14:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3411. [2021-08-06 14:14:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 2.613489736070381) internal successors, (8912), 3410 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 8912 transitions. [2021-08-06 14:14:06,692 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 8912 transitions. Word has length 41 [2021-08-06 14:14:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:06,692 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 8912 transitions. [2021-08-06 14:14:06,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 8912 transitions. [2021-08-06 14:14:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:06,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:06,695 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:06,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-06 14:14:06,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:06,896 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash -736974121, now seen corresponding path program 39 times [2021-08-06 14:14:06,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:06,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721054100] [2021-08-06 14:14:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:06,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:07,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:07,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721054100] [2021-08-06 14:14:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721054100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:07,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121322233] [2021-08-06 14:14:07,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:14:07,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:07,007 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:07,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-06 14:14:10,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:14:10,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:14:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:10,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121322233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:10,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:10,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:14:10,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356264977] [2021-08-06 14:14:10,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:14:10,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:14:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:14:10,842 INFO L87 Difference]: Start difference. First operand 3411 states and 8912 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:11,005 INFO L93 Difference]: Finished difference Result 4058 states and 10288 transitions. [2021-08-06 14:14:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:14:11,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:11,013 INFO L225 Difference]: With dead ends: 4058 [2021-08-06 14:14:11,013 INFO L226 Difference]: Without dead ends: 4048 [2021-08-06 14:14:11,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-08-06 14:14:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3653. [2021-08-06 14:14:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.6130887185104053) internal successors, (9543), 3652 states have internal predecessors, (9543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 9543 transitions. [2021-08-06 14:14:11,069 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 9543 transitions. Word has length 41 [2021-08-06 14:14:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:11,069 INFO L470 AbstractCegarLoop]: Abstraction has 3653 states and 9543 transitions. [2021-08-06 14:14:11,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 9543 transitions. [2021-08-06 14:14:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:11,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:11,073 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:11,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-06 14:14:11,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:11,274 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1562242700, now seen corresponding path program 80 times [2021-08-06 14:14:11,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:11,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986725974] [2021-08-06 14:14:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:11,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:11,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:11,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986725974] [2021-08-06 14:14:11,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986725974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:11,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388761759] [2021-08-06 14:14:11,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:14:11,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:11,386 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:11,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-06 14:14:14,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:14:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:14:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:15,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:14:15,242 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 14:14:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:14:15,244 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-06 14:14:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:15,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388761759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:15,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:15,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-06 14:14:15,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049539029] [2021-08-06 14:14:15,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:14:15,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:14:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:14:15,279 INFO L87 Difference]: Start difference. First operand 3653 states and 9543 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:15,730 INFO L93 Difference]: Finished difference Result 4913 states and 12124 transitions. [2021-08-06 14:14:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:14:15,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:15,739 INFO L225 Difference]: With dead ends: 4913 [2021-08-06 14:14:15,739 INFO L226 Difference]: Without dead ends: 4859 [2021-08-06 14:14:15,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:14:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2021-08-06 14:14:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 3736. [2021-08-06 14:14:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 2.61285140562249) internal successors, (9759), 3735 states have internal predecessors, (9759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 9759 transitions. [2021-08-06 14:14:15,818 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 9759 transitions. Word has length 41 [2021-08-06 14:14:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:15,818 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 9759 transitions. [2021-08-06 14:14:15,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:15,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 9759 transitions. [2021-08-06 14:14:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:15,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:15,823 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:15,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-06 14:14:16,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-06 14:14:16,023 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:16,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1200165487, now seen corresponding path program 81 times [2021-08-06 14:14:16,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:16,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781086051] [2021-08-06 14:14:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:16,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:16,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:16,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781086051] [2021-08-06 14:14:16,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781086051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:16,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063421764] [2021-08-06 14:14:16,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:14:16,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:16,138 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:16,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-06 14:14:19,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:14:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:14:19,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:19,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063421764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:19,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:19,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 14:14:19,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315289548] [2021-08-06 14:14:19,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:14:19,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:19,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:14:19,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:14:19,718 INFO L87 Difference]: Start difference. First operand 3736 states and 9759 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:19,842 INFO L93 Difference]: Finished difference Result 4470 states and 11244 transitions. [2021-08-06 14:14:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:14:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:19,849 INFO L225 Difference]: With dead ends: 4470 [2021-08-06 14:14:19,849 INFO L226 Difference]: Without dead ends: 4452 [2021-08-06 14:14:19,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2021-08-06 14:14:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 3826. [2021-08-06 14:14:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3826 states, 3825 states have (on average 2.624575163398693) internal successors, (10039), 3825 states have internal predecessors, (10039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3826 states to 3826 states and 10039 transitions. [2021-08-06 14:14:19,899 INFO L78 Accepts]: Start accepts. Automaton has 3826 states and 10039 transitions. Word has length 41 [2021-08-06 14:14:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:19,899 INFO L470 AbstractCegarLoop]: Abstraction has 3826 states and 10039 transitions. [2021-08-06 14:14:19,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3826 states and 10039 transitions. [2021-08-06 14:14:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:19,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:19,902 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:19,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:20,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-06 14:14:20,103 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1717079234, now seen corresponding path program 82 times [2021-08-06 14:14:20,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:20,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028339382] [2021-08-06 14:14:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:20,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:20,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:20,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028339382] [2021-08-06 14:14:20,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028339382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:20,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404044198] [2021-08-06 14:14:20,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:14:20,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:20,226 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:20,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-06 14:14:23,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:14:23,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:14:23,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:23,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:14:23,809 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-06 14:14:23,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:14:23,811 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-06 14:14:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:23,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404044198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:23,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:23,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-06 14:14:23,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274646997] [2021-08-06 14:14:23,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:14:23,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:14:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:23,842 INFO L87 Difference]: Start difference. First operand 3826 states and 10039 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 14:14:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:24,408 INFO L93 Difference]: Finished difference Result 7033 states and 16716 transitions. [2021-08-06 14:14:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:14:24,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 41 [2021-08-06 14:14:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:24,418 INFO L225 Difference]: With dead ends: 7033 [2021-08-06 14:14:24,419 INFO L226 Difference]: Without dead ends: 6853 [2021-08-06 14:14:24,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:14:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6853 states. [2021-08-06 14:14:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6853 to 4043. [2021-08-06 14:14:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4043 states, 4042 states have (on average 2.6150420583869374) internal successors, (10570), 4042 states have internal predecessors, (10570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4043 states to 4043 states and 10570 transitions. [2021-08-06 14:14:24,487 INFO L78 Accepts]: Start accepts. Automaton has 4043 states and 10570 transitions. Word has length 41 [2021-08-06 14:14:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:24,487 INFO L470 AbstractCegarLoop]: Abstraction has 4043 states and 10570 transitions. [2021-08-06 14:14:24,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 14:14:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4043 states and 10570 transitions. [2021-08-06 14:14:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:24,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:24,490 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:24,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-06 14:14:24,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:24,690 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2103681911, now seen corresponding path program 83 times [2021-08-06 14:14:24,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:24,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741890686] [2021-08-06 14:14:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:24,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:24,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:24,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741890686] [2021-08-06 14:14:24,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741890686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:24,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553466925] [2021-08-06 14:14:24,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:14:24,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:24,812 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:24,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-06 14:14:28,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:14:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:14:28,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:28,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553466925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:28,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:28,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-08-06 14:14:28,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903645866] [2021-08-06 14:14:28,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:14:28,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:14:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:28,774 INFO L87 Difference]: Start difference. First operand 4043 states and 10570 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:28,981 INFO L93 Difference]: Finished difference Result 4874 states and 12132 transitions. [2021-08-06 14:14:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:14:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:28,988 INFO L225 Difference]: With dead ends: 4874 [2021-08-06 14:14:28,989 INFO L226 Difference]: Without dead ends: 4847 [2021-08-06 14:14:28,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:14:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-08-06 14:14:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 4043. [2021-08-06 14:14:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4043 states, 4042 states have (on average 2.614299851558634) internal successors, (10567), 4042 states have internal predecessors, (10567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4043 states to 4043 states and 10567 transitions. [2021-08-06 14:14:29,056 INFO L78 Accepts]: Start accepts. Automaton has 4043 states and 10567 transitions. Word has length 41 [2021-08-06 14:14:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:29,056 INFO L470 AbstractCegarLoop]: Abstraction has 4043 states and 10567 transitions. [2021-08-06 14:14:29,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4043 states and 10567 transitions. [2021-08-06 14:14:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:29,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:29,060 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:29,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-08-06 14:14:29,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:29,261 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1657387724, now seen corresponding path program 84 times [2021-08-06 14:14:29,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:29,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110971938] [2021-08-06 14:14:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:29,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:29,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:29,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110971938] [2021-08-06 14:14:29,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110971938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:29,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974750400] [2021-08-06 14:14:29,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:14:29,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:29,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:29,400 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:29,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-06 14:14:33,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 14:14:33,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:33,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:14:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:33,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974750400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:33,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:33,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:14:33,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811858254] [2021-08-06 14:14:33,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:14:33,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:33,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:14:33,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:14:33,356 INFO L87 Difference]: Start difference. First operand 4043 states and 10567 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:34,402 INFO L93 Difference]: Finished difference Result 8156 states and 19246 transitions. [2021-08-06 14:14:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 14:14:34,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:34,414 INFO L225 Difference]: With dead ends: 8156 [2021-08-06 14:14:34,415 INFO L226 Difference]: Without dead ends: 7880 [2021-08-06 14:14:34,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 686.4ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 14:14:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7880 states. [2021-08-06 14:14:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7880 to 4399. [2021-08-06 14:14:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 2.600954979536153) internal successors, (11439), 4398 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 11439 transitions. [2021-08-06 14:14:34,494 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 11439 transitions. Word has length 41 [2021-08-06 14:14:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:34,494 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 11439 transitions. [2021-08-06 14:14:34,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 11439 transitions. [2021-08-06 14:14:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:34,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:34,499 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:34,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-06 14:14:34,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-06 14:14:34,699 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash -744006703, now seen corresponding path program 85 times [2021-08-06 14:14:34,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:34,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270408969] [2021-08-06 14:14:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:34,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:34,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:34,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270408969] [2021-08-06 14:14:34,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270408969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:34,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884771695] [2021-08-06 14:14:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:14:34,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:34,834 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:34,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-06 14:14:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:14:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:38,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884771695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:38,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:38,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 14:14:38,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780463452] [2021-08-06 14:14:38,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:14:38,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:14:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:38,869 INFO L87 Difference]: Start difference. First operand 4399 states and 11439 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:39,066 INFO L93 Difference]: Finished difference Result 5326 states and 13165 transitions. [2021-08-06 14:14:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:14:39,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:39,076 INFO L225 Difference]: With dead ends: 5326 [2021-08-06 14:14:39,076 INFO L226 Difference]: Without dead ends: 5290 [2021-08-06 14:14:39,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:14:39,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5290 states. [2021-08-06 14:14:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5290 to 4399. [2021-08-06 14:14:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 2.600272851296044) internal successors, (11436), 4398 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 11436 transitions. [2021-08-06 14:14:39,164 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 11436 transitions. Word has length 41 [2021-08-06 14:14:39,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:39,164 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 11436 transitions. [2021-08-06 14:14:39,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 11436 transitions. [2021-08-06 14:14:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:39,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:39,170 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:39,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-08-06 14:14:39,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-06 14:14:39,371 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1504073858, now seen corresponding path program 86 times [2021-08-06 14:14:39,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:39,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965047516] [2021-08-06 14:14:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:39,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:39,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:39,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965047516] [2021-08-06 14:14:39,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965047516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:39,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788249506] [2021-08-06 14:14:39,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:14:39,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:39,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:39,505 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:39,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-06 14:14:43,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:14:43,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:14:43,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:43,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788249506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:43,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:43,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:14:43,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37942472] [2021-08-06 14:14:43,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:14:43,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:43,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:14:43,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:43,428 INFO L87 Difference]: Start difference. First operand 4399 states and 11436 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:43,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:43,861 INFO L93 Difference]: Finished difference Result 5629 states and 13668 transitions. [2021-08-06 14:14:43,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:14:43,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:14:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:43,871 INFO L225 Difference]: With dead ends: 5629 [2021-08-06 14:14:43,871 INFO L226 Difference]: Without dead ends: 5251 [2021-08-06 14:14:43,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:14:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-08-06 14:14:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3571. [2021-08-06 14:14:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 2.6439775910364145) internal successors, (9439), 3570 states have internal predecessors, (9439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 9439 transitions. [2021-08-06 14:14:43,944 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 9439 transitions. Word has length 41 [2021-08-06 14:14:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:43,944 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 9439 transitions. [2021-08-06 14:14:43,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 9439 transitions. [2021-08-06 14:14:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:43,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:43,949 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:43,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-06 14:14:44,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:44,149 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:44,150 INFO L82 PathProgramCache]: Analyzing trace with hash 644131931, now seen corresponding path program 40 times [2021-08-06 14:14:44,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:44,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489884786] [2021-08-06 14:14:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:44,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:44,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:44,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489884786] [2021-08-06 14:14:44,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489884786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:44,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397814549] [2021-08-06 14:14:44,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:14:44,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:44,261 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:44,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-06 14:14:47,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:14:47,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:47,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:14:47,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:48,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397814549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:48,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:48,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2021-08-06 14:14:48,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84178592] [2021-08-06 14:14:48,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:14:48,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:48,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:14:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:14:48,326 INFO L87 Difference]: Start difference. First operand 3571 states and 9439 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 14:14:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:48,693 INFO L93 Difference]: Finished difference Result 4371 states and 11018 transitions. [2021-08-06 14:14:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:14:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 41 [2021-08-06 14:14:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:48,700 INFO L225 Difference]: With dead ends: 4371 [2021-08-06 14:14:48,700 INFO L226 Difference]: Without dead ends: 4371 [2021-08-06 14:14:48,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:14:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-08-06 14:14:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3526. [2021-08-06 14:14:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 2.6536170212765957) internal successors, (9354), 3525 states have internal predecessors, (9354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 9354 transitions. [2021-08-06 14:14:48,755 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 9354 transitions. Word has length 41 [2021-08-06 14:14:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:48,755 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 9354 transitions. [2021-08-06 14:14:48,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 14:14:48,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 9354 transitions. [2021-08-06 14:14:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:14:48,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:48,758 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:48,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-08-06 14:14:48,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:48,959 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:14:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:48,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2041475785, now seen corresponding path program 87 times [2021-08-06 14:14:48,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:48,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235393930] [2021-08-06 14:14:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:48,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:49,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:49,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235393930] [2021-08-06 14:14:49,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235393930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:49,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559263656] [2021-08-06 14:14:49,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:14:49,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:49,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:49,104 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:49,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-06 14:14:52,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:14:52,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:52,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:14:52,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:53,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559263656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:53,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:53,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-06 14:14:53,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653519098] [2021-08-06 14:14:53,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:14:53,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:14:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:14:53,705 INFO L87 Difference]: Start difference. First operand 3526 states and 9354 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:02,675 INFO L93 Difference]: Finished difference Result 5989 states and 14828 transitions. [2021-08-06 14:15:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:15:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 14:15:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:02,684 INFO L225 Difference]: With dead ends: 5989 [2021-08-06 14:15:02,684 INFO L226 Difference]: Without dead ends: 5897 [2021-08-06 14:15:02,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 14:15:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2021-08-06 14:15:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 3535. [2021-08-06 14:15:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.650820599886814) internal successors, (9368), 3534 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9368 transitions. [2021-08-06 14:15:02,749 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9368 transitions. Word has length 41 [2021-08-06 14:15:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:02,750 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 9368 transitions. [2021-08-06 14:15:02,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9368 transitions. [2021-08-06 14:15:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:15:02,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:02,753 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:02,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-08-06 14:15:02,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:02,954 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:02,954 INFO L82 PathProgramCache]: Analyzing trace with hash -79555922, now seen corresponding path program 88 times [2021-08-06 14:15:02,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:02,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850393347] [2021-08-06 14:15:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:02,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:03,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:03,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850393347] [2021-08-06 14:15:03,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850393347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:03,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982975913] [2021-08-06 14:15:03,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:03,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:03,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:03,105 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:03,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-06 14:15:06,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:15:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:07,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982975913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:07,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:07,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-08-06 14:15:07,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351104622] [2021-08-06 14:15:07,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:15:07,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:15:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:15:07,288 INFO L87 Difference]: Start difference. First operand 3535 states and 9368 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:08,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:08,425 INFO L93 Difference]: Finished difference Result 5472 states and 13303 transitions. [2021-08-06 14:15:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:15:08,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 14:15:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:08,433 INFO L225 Difference]: With dead ends: 5472 [2021-08-06 14:15:08,434 INFO L226 Difference]: Without dead ends: 5434 [2021-08-06 14:15:08,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 632.6ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 14:15:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-08-06 14:15:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4165. [2021-08-06 14:15:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4164 states have (on average 2.6183957732949086) internal successors, (10903), 4164 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 10903 transitions. [2021-08-06 14:15:08,499 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 10903 transitions. Word has length 44 [2021-08-06 14:15:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:08,499 INFO L470 AbstractCegarLoop]: Abstraction has 4165 states and 10903 transitions. [2021-08-06 14:15:08,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 10903 transitions. [2021-08-06 14:15:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:15:08,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:08,503 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:08,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:08,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:08,703 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:08,704 INFO L82 PathProgramCache]: Analyzing trace with hash -945685074, now seen corresponding path program 89 times [2021-08-06 14:15:08,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:08,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020877070] [2021-08-06 14:15:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:08,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:15:08,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:08,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020877070] [2021-08-06 14:15:08,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020877070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:08,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167745873] [2021-08-06 14:15:08,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:08,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:08,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:08,812 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:08,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-06 14:15:12,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 14:15:12,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:15:12,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:15:12,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167745873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:12,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:12,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 14:15:12,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607795811] [2021-08-06 14:15:12,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:15:12,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:15:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:15:12,744 INFO L87 Difference]: Start difference. First operand 4165 states and 10903 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:12,950 INFO L93 Difference]: Finished difference Result 4791 states and 12152 transitions. [2021-08-06 14:15:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:15:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 14:15:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:12,958 INFO L225 Difference]: With dead ends: 4791 [2021-08-06 14:15:12,958 INFO L226 Difference]: Without dead ends: 4756 [2021-08-06 14:15:12,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:15:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4756 states. [2021-08-06 14:15:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4756 to 4183. [2021-08-06 14:15:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.616212338593974) internal successors, (10941), 4182 states have internal predecessors, (10941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 10941 transitions. [2021-08-06 14:15:13,014 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 10941 transitions. Word has length 44 [2021-08-06 14:15:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:13,014 INFO L470 AbstractCegarLoop]: Abstraction has 4183 states and 10941 transitions. [2021-08-06 14:15:13,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 10941 transitions. [2021-08-06 14:15:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:15:13,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:13,018 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:13,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-06 14:15:13,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-06 14:15:13,219 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:13,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1632538552, now seen corresponding path program 90 times [2021-08-06 14:15:13,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:13,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056939823] [2021-08-06 14:15:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:13,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:15:13,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:13,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056939823] [2021-08-06 14:15:13,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056939823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:13,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300052254] [2021-08-06 14:15:13,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:13,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:13,315 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:13,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-06 14:15:16,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 14:15:16,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:15:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300052254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:17,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:17,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:15:17,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364464000] [2021-08-06 14:15:17,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:15:17,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:15:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:17,354 INFO L87 Difference]: Start difference. First operand 4183 states and 10941 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:18,032 INFO L93 Difference]: Finished difference Result 6319 states and 15114 transitions. [2021-08-06 14:15:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:15:18,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 14:15:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:18,043 INFO L225 Difference]: With dead ends: 6319 [2021-08-06 14:15:18,043 INFO L226 Difference]: Without dead ends: 6256 [2021-08-06 14:15:18,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:15:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-08-06 14:15:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4253. [2021-08-06 14:15:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.6067732831608654) internal successors, (11084), 4252 states have internal predecessors, (11084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11084 transitions. [2021-08-06 14:15:18,144 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11084 transitions. Word has length 44 [2021-08-06 14:15:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:18,144 INFO L470 AbstractCegarLoop]: Abstraction has 4253 states and 11084 transitions. [2021-08-06 14:15:18,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11084 transitions. [2021-08-06 14:15:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:15:18,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:18,149 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:18,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:18,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-06 14:15:18,350 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:18,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1834663790, now seen corresponding path program 91 times [2021-08-06 14:15:18,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:18,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253943581] [2021-08-06 14:15:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:18,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:15:18,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:18,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253943581] [2021-08-06 14:15:18,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253943581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:18,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725764718] [2021-08-06 14:15:18,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:18,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:18,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:18,448 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:18,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-06 14:15:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:15:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:15:22,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725764718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:22,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:22,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 14:15:22,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592633625] [2021-08-06 14:15:22,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:15:22,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:22,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:15:22,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:15:22,318 INFO L87 Difference]: Start difference. First operand 4253 states and 11084 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:22,543 INFO L93 Difference]: Finished difference Result 4892 states and 12347 transitions. [2021-08-06 14:15:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:15:22,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 14:15:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:22,551 INFO L225 Difference]: With dead ends: 4892 [2021-08-06 14:15:22,551 INFO L226 Difference]: Without dead ends: 4854 [2021-08-06 14:15:22,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:15:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-08-06 14:15:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 4325. [2021-08-06 14:15:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4325 states, 4324 states have (on average 2.595513413506013) internal successors, (11223), 4324 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 11223 transitions. [2021-08-06 14:15:22,611 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 11223 transitions. Word has length 44 [2021-08-06 14:15:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:22,611 INFO L470 AbstractCegarLoop]: Abstraction has 4325 states and 11223 transitions. [2021-08-06 14:15:22,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 11223 transitions. [2021-08-06 14:15:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:15:22,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:22,616 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:22,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-06 14:15:22,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:22,816 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash -703834488, now seen corresponding path program 92 times [2021-08-06 14:15:22,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:22,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177223260] [2021-08-06 14:15:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:22,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 14:15:22,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:22,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177223260] [2021-08-06 14:15:22,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177223260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:22,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708789237] [2021-08-06 14:15:22,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:22,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:22,928 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:22,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-06 14:15:26,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:26,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:26,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:15:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:27,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708789237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:27,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:27,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:15:27,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338342638] [2021-08-06 14:15:27,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:15:27,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:15:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:27,070 INFO L87 Difference]: Start difference. First operand 4325 states and 11223 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:27,865 INFO L93 Difference]: Finished difference Result 6671 states and 15728 transitions. [2021-08-06 14:15:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:15:27,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 14:15:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:27,880 INFO L225 Difference]: With dead ends: 6671 [2021-08-06 14:15:27,880 INFO L226 Difference]: Without dead ends: 6608 [2021-08-06 14:15:27,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:15:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-08-06 14:15:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 4429. [2021-08-06 14:15:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 2.580623306233062) internal successors, (11427), 4428 states have internal predecessors, (11427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 11427 transitions. [2021-08-06 14:15:27,974 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 11427 transitions. Word has length 44 [2021-08-06 14:15:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:27,974 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 11427 transitions. [2021-08-06 14:15:27,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 11427 transitions. [2021-08-06 14:15:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:15:27,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:27,979 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:28,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2021-08-06 14:15:28,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:28,180 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:28,180 INFO L82 PathProgramCache]: Analyzing trace with hash 678113582, now seen corresponding path program 93 times [2021-08-06 14:15:28,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:28,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687179712] [2021-08-06 14:15:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:28,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:15:28,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:28,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687179712] [2021-08-06 14:15:28,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687179712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:28,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774262347] [2021-08-06 14:15:28,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:28,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:28,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:28,294 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:28,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-06 14:15:32,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:15:32,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:32,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:15:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:32,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774262347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:32,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:32,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:15:32,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714942987] [2021-08-06 14:15:32,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:15:32,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:32,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:15:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:32,763 INFO L87 Difference]: Start difference. First operand 4429 states and 11427 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:33,575 INFO L93 Difference]: Finished difference Result 6995 states and 16572 transitions. [2021-08-06 14:15:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:15:33,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 14:15:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:33,588 INFO L225 Difference]: With dead ends: 6995 [2021-08-06 14:15:33,588 INFO L226 Difference]: Without dead ends: 6957 [2021-08-06 14:15:33,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:15:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2021-08-06 14:15:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 4866. [2021-08-06 14:15:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4866 states, 4865 states have (on average 2.5788283658787257) internal successors, (12546), 4865 states have internal predecessors, (12546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4866 states to 4866 states and 12546 transitions. [2021-08-06 14:15:33,665 INFO L78 Accepts]: Start accepts. Automaton has 4866 states and 12546 transitions. Word has length 44 [2021-08-06 14:15:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:33,666 INFO L470 AbstractCegarLoop]: Abstraction has 4866 states and 12546 transitions. [2021-08-06 14:15:33,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4866 states and 12546 transitions. [2021-08-06 14:15:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:15:33,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:33,671 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:33,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-06 14:15:33,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:33,871 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash -98819019, now seen corresponding path program 41 times [2021-08-06 14:15:33,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:33,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331797783] [2021-08-06 14:15:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:33,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:34,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:34,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331797783] [2021-08-06 14:15:34,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331797783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:34,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478550346] [2021-08-06 14:15:34,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:34,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:34,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:34,028 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:34,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-06 14:15:38,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:15:38,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:15:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:38,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478550346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:38,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:38,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 14:15:38,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688281999] [2021-08-06 14:15:38,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:15:38,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:15:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:38,334 INFO L87 Difference]: Start difference. First operand 4866 states and 12546 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:39,094 INFO L93 Difference]: Finished difference Result 6535 states and 16062 transitions. [2021-08-06 14:15:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:15:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:15:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:39,105 INFO L225 Difference]: With dead ends: 6535 [2021-08-06 14:15:39,106 INFO L226 Difference]: Without dead ends: 6492 [2021-08-06 14:15:39,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:15:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6492 states. [2021-08-06 14:15:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6492 to 5120. [2021-08-06 14:15:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5120 states, 5119 states have (on average 2.561828482125415) internal successors, (13114), 5119 states have internal predecessors, (13114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 13114 transitions. [2021-08-06 14:15:39,189 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 13114 transitions. Word has length 47 [2021-08-06 14:15:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:39,189 INFO L470 AbstractCegarLoop]: Abstraction has 5120 states and 13114 transitions. [2021-08-06 14:15:39,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 13114 transitions. [2021-08-06 14:15:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:15:39,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:39,194 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:39,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-06 14:15:39,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:39,395 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash -53611659, now seen corresponding path program 94 times [2021-08-06 14:15:39,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:39,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693292104] [2021-08-06 14:15:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:39,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:39,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:39,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693292104] [2021-08-06 14:15:39,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693292104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:39,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796158032] [2021-08-06 14:15:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:39,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:39,574 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:39,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-06 14:15:43,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:43,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:15:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796158032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:43,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:43,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-06 14:15:43,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44828630] [2021-08-06 14:15:43,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:15:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:15:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:43,996 INFO L87 Difference]: Start difference. First operand 5120 states and 13114 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 14:15:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:44,476 INFO L93 Difference]: Finished difference Result 5434 states and 13621 transitions. [2021-08-06 14:15:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:44,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 47 [2021-08-06 14:15:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:44,484 INFO L225 Difference]: With dead ends: 5434 [2021-08-06 14:15:44,484 INFO L226 Difference]: Without dead ends: 5390 [2021-08-06 14:15:44,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-08-06 14:15:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 5100. [2021-08-06 14:15:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 2.5603059423416354) internal successors, (13055), 5099 states have internal predecessors, (13055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 13055 transitions. [2021-08-06 14:15:44,545 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 13055 transitions. Word has length 47 [2021-08-06 14:15:44,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:44,546 INFO L470 AbstractCegarLoop]: Abstraction has 5100 states and 13055 transitions. [2021-08-06 14:15:44,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 14:15:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 13055 transitions. [2021-08-06 14:15:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:15:44,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:44,550 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:44,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-08-06 14:15:44,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:44,751 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1460077889, now seen corresponding path program 95 times [2021-08-06 14:15:44,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:44,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732021428] [2021-08-06 14:15:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:44,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:44,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:44,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732021428] [2021-08-06 14:15:44,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732021428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:44,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635664020] [2021-08-06 14:15:44,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:44,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:44,889 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:44,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-06 14:15:48,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 14:15:48,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:48,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:15:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:48,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635664020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:48,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:48,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:15:48,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498118715] [2021-08-06 14:15:48,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:48,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:48,898 INFO L87 Difference]: Start difference. First operand 5100 states and 13055 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 14:15:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:49,215 INFO L93 Difference]: Finished difference Result 5664 states and 14122 transitions. [2021-08-06 14:15:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:15:49,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 47 [2021-08-06 14:15:49,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:49,224 INFO L225 Difference]: With dead ends: 5664 [2021-08-06 14:15:49,224 INFO L226 Difference]: Without dead ends: 5664 [2021-08-06 14:15:49,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2021-08-06 14:15:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 5112. [2021-08-06 14:15:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5111 states have (on average 2.561533946390139) internal successors, (13092), 5111 states have internal predecessors, (13092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 13092 transitions. [2021-08-06 14:15:49,296 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 13092 transitions. Word has length 47 [2021-08-06 14:15:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:49,296 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 13092 transitions. [2021-08-06 14:15:49,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 14:15:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 13092 transitions. [2021-08-06 14:15:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:15:49,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:49,301 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:49,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2021-08-06 14:15:49,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:49,502 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:49,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:49,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2124626571, now seen corresponding path program 96 times [2021-08-06 14:15:49,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:49,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198470710] [2021-08-06 14:15:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:49,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:49,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:49,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198470710] [2021-08-06 14:15:49,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198470710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:49,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074878821] [2021-08-06 14:15:49,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:49,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:49,663 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:49,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-06 14:15:53,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 14:15:53,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:15:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:15:53,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074878821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:53,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:53,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:15:53,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751474651] [2021-08-06 14:15:53,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:15:53,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:15:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:53,984 INFO L87 Difference]: Start difference. First operand 5112 states and 13092 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 14:15:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:54,499 INFO L93 Difference]: Finished difference Result 5490 states and 13718 transitions. [2021-08-06 14:15:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:15:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 47 [2021-08-06 14:15:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:54,507 INFO L225 Difference]: With dead ends: 5490 [2021-08-06 14:15:54,507 INFO L226 Difference]: Without dead ends: 5402 [2021-08-06 14:15:54,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:15:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-08-06 14:15:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5112. [2021-08-06 14:15:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5111 states have (on average 2.560360007826257) internal successors, (13086), 5111 states have internal predecessors, (13086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 13086 transitions. [2021-08-06 14:15:54,569 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 13086 transitions. Word has length 47 [2021-08-06 14:15:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:54,569 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 13086 transitions. [2021-08-06 14:15:54,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 14:15:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 13086 transitions. [2021-08-06 14:15:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:15:54,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:54,574 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:54,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-06 14:15:54,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:54,775 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:54,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:54,775 INFO L82 PathProgramCache]: Analyzing trace with hash -361757880, now seen corresponding path program 42 times [2021-08-06 14:15:54,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:54,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433019811] [2021-08-06 14:15:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:54,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:54,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:54,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433019811] [2021-08-06 14:15:54,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433019811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:54,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194911724] [2021-08-06 14:15:54,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:54,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:54,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:54,940 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:54,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-06 14:15:58,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-06 14:15:58,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:15:58,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:59,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194911724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:59,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:59,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-08-06 14:15:59,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019482987] [2021-08-06 14:15:59,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:15:59,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:15:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:15:59,157 INFO L87 Difference]: Start difference. First operand 5112 states and 13086 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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 14:15:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:59,491 INFO L93 Difference]: Finished difference Result 7216 states and 17280 transitions. [2021-08-06 14:15:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:15:59,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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 47 [2021-08-06 14:15:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:59,503 INFO L225 Difference]: With dead ends: 7216 [2021-08-06 14:15:59,503 INFO L226 Difference]: Without dead ends: 7146 [2021-08-06 14:15:59,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:15:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2021-08-06 14:15:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 5081. [2021-08-06 14:15:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 5080 states have (on average 2.518700787401575) internal successors, (12795), 5080 states have internal predecessors, (12795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 12795 transitions. [2021-08-06 14:15:59,586 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 12795 transitions. Word has length 47 [2021-08-06 14:15:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:59,586 INFO L470 AbstractCegarLoop]: Abstraction has 5081 states and 12795 transitions. [2021-08-06 14:15:59,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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 14:15:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 12795 transitions. [2021-08-06 14:15:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:15:59,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:59,592 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:59,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:59,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:59,793 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:15:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash 595441160, now seen corresponding path program 43 times [2021-08-06 14:15:59,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:59,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784155263] [2021-08-06 14:15:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:59,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:15:59,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:59,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784155263] [2021-08-06 14:15:59,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784155263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:59,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108984841] [2021-08-06 14:15:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:59,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:59,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:59,937 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:59,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-06 14:16:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:16:03,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:04,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108984841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:04,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:04,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:16:04,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292910554] [2021-08-06 14:16:04,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:16:04,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:04,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:16:04,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:16:04,007 INFO L87 Difference]: Start difference. First operand 5081 states and 12795 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:04,173 INFO L93 Difference]: Finished difference Result 7811 states and 19060 transitions. [2021-08-06 14:16:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:16:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:16:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:04,184 INFO L225 Difference]: With dead ends: 7811 [2021-08-06 14:16:04,184 INFO L226 Difference]: Without dead ends: 7811 [2021-08-06 14:16:04,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:16:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7811 states. [2021-08-06 14:16:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7811 to 5698. [2021-08-06 14:16:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5698 states, 5697 states have (on average 2.5803054239073195) internal successors, (14700), 5697 states have internal predecessors, (14700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5698 states to 5698 states and 14700 transitions. [2021-08-06 14:16:04,267 INFO L78 Accepts]: Start accepts. Automaton has 5698 states and 14700 transitions. Word has length 47 [2021-08-06 14:16:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:04,267 INFO L470 AbstractCegarLoop]: Abstraction has 5698 states and 14700 transitions. [2021-08-06 14:16:04,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5698 states and 14700 transitions. [2021-08-06 14:16:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:04,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:04,273 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:04,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-06 14:16:04,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:04,474 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:04,474 INFO L82 PathProgramCache]: Analyzing trace with hash 61575784, now seen corresponding path program 97 times [2021-08-06 14:16:04,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:04,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000307067] [2021-08-06 14:16:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:04,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:04,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:04,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000307067] [2021-08-06 14:16:04,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000307067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:04,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210218241] [2021-08-06 14:16:04,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:16:04,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:04,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:04,595 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:04,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-06 14:16:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:08,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:16:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210218241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:08,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:08,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:16:08,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819550067] [2021-08-06 14:16:08,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:16:08,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:16:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:16:08,961 INFO L87 Difference]: Start difference. First operand 5698 states and 14700 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:09,146 INFO L93 Difference]: Finished difference Result 6122 states and 15492 transitions. [2021-08-06 14:16:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:16:09,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:16:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:09,158 INFO L225 Difference]: With dead ends: 6122 [2021-08-06 14:16:09,158 INFO L226 Difference]: Without dead ends: 6116 [2021-08-06 14:16:09,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:16:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2021-08-06 14:16:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 5587. [2021-08-06 14:16:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 2.5698174006444683) internal successors, (14355), 5586 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 14355 transitions. [2021-08-06 14:16:09,255 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 14355 transitions. Word has length 47 [2021-08-06 14:16:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 5587 states and 14355 transitions. [2021-08-06 14:16:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 14355 transitions. [2021-08-06 14:16:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:09,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:09,261 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:09,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-06 14:16:09,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:09,462 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash -243997515, now seen corresponding path program 44 times [2021-08-06 14:16:09,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:09,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845092148] [2021-08-06 14:16:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:09,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:16:09,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:09,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845092148] [2021-08-06 14:16:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845092148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:09,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342039699] [2021-08-06 14:16:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:16:09,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:09,613 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:09,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-06 14:16:13,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:16:13,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:13,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:13,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:16:14,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342039699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:14,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:14,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:16:14,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936802464] [2021-08-06 14:16:14,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:16:14,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:16:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:16:14,212 INFO L87 Difference]: Start difference. First operand 5587 states and 14355 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:16:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:14,601 INFO L93 Difference]: Finished difference Result 6761 states and 16684 transitions. [2021-08-06 14:16:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:16:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 47 [2021-08-06 14:16:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:14,614 INFO L225 Difference]: With dead ends: 6761 [2021-08-06 14:16:14,615 INFO L226 Difference]: Without dead ends: 6723 [2021-08-06 14:16:14,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:16:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6723 states. [2021-08-06 14:16:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6723 to 5678. [2021-08-06 14:16:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5678 states, 5677 states have (on average 2.5657917914391404) internal successors, (14566), 5677 states have internal predecessors, (14566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5678 states to 5678 states and 14566 transitions. [2021-08-06 14:16:14,696 INFO L78 Accepts]: Start accepts. Automaton has 5678 states and 14566 transitions. Word has length 47 [2021-08-06 14:16:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:14,696 INFO L470 AbstractCegarLoop]: Abstraction has 5678 states and 14566 transitions. [2021-08-06 14:16:14,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:16:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5678 states and 14566 transitions. [2021-08-06 14:16:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:14,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:14,701 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:14,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-06 14:16:14,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-06 14:16:14,902 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:14,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1797694372, now seen corresponding path program 98 times [2021-08-06 14:16:14,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:14,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987473192] [2021-08-06 14:16:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:14,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:15,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987473192] [2021-08-06 14:16:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987473192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421128962] [2021-08-06 14:16:15,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:16:15,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:15,031 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:15,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-06 14:16:19,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:16:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:16:19,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:16:19,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421128962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:19,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:19,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:16:19,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057596282] [2021-08-06 14:16:19,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:16:19,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:19,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:16:19,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:16:19,655 INFO L87 Difference]: Start difference. First operand 5678 states and 14566 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:19,831 INFO L93 Difference]: Finished difference Result 6540 states and 16162 transitions. [2021-08-06 14:16:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:16:19,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:16:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:19,842 INFO L225 Difference]: With dead ends: 6540 [2021-08-06 14:16:19,842 INFO L226 Difference]: Without dead ends: 6537 [2021-08-06 14:16:19,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:16:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6537 states. [2021-08-06 14:16:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6537 to 5658. [2021-08-06 14:16:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5657 states have (on average 2.5624889517412055) internal successors, (14496), 5657 states have internal predecessors, (14496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 14496 transitions. [2021-08-06 14:16:19,930 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 14496 transitions. Word has length 47 [2021-08-06 14:16:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:19,930 INFO L470 AbstractCegarLoop]: Abstraction has 5658 states and 14496 transitions. [2021-08-06 14:16:19,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 14496 transitions. [2021-08-06 14:16:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:19,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:19,936 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:19,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2021-08-06 14:16:20,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-06 14:16:20,137 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1590631806, now seen corresponding path program 99 times [2021-08-06 14:16:20,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:20,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800869098] [2021-08-06 14:16:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:20,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:20,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:20,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800869098] [2021-08-06 14:16:20,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800869098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:20,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852449823] [2021-08-06 14:16:20,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:16:20,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:20,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:20,308 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:20,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-06 14:16:24,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:16:24,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:16:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:16:24,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852449823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:24,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:24,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:16:24,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125798178] [2021-08-06 14:16:24,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:16:24,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:24,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:16:24,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:16:24,663 INFO L87 Difference]: Start difference. First operand 5658 states and 14496 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 14:16:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:24,855 INFO L93 Difference]: Finished difference Result 6550 states and 16131 transitions. [2021-08-06 14:16:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:16:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-08-06 14:16:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:24,864 INFO L225 Difference]: With dead ends: 6550 [2021-08-06 14:16:24,864 INFO L226 Difference]: Without dead ends: 6532 [2021-08-06 14:16:24,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:16:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2021-08-06 14:16:24,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 5658. [2021-08-06 14:16:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5657 states have (on average 2.5607212303340994) internal successors, (14486), 5657 states have internal predecessors, (14486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 14486 transitions. [2021-08-06 14:16:24,931 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 14486 transitions. Word has length 47 [2021-08-06 14:16:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:24,931 INFO L470 AbstractCegarLoop]: Abstraction has 5658 states and 14486 transitions. [2021-08-06 14:16:24,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 14:16:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 14486 transitions. [2021-08-06 14:16:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:24,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:24,935 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:24,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-06 14:16:25,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-06 14:16:25,136 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1256335477, now seen corresponding path program 100 times [2021-08-06 14:16:25,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:25,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420544608] [2021-08-06 14:16:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:25,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:16:25,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:25,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420544608] [2021-08-06 14:16:25,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420544608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:25,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417755458] [2021-08-06 14:16:25,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:16:25,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:25,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:25,270 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:25,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-06 14:16:29,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:16:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:16:29,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417755458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:29,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:29,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 14:16:29,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910865356] [2021-08-06 14:16:29,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:16:29,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:16:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:16:29,481 INFO L87 Difference]: Start difference. First operand 5658 states and 14486 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:16:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:29,946 INFO L93 Difference]: Finished difference Result 6302 states and 15657 transitions. [2021-08-06 14:16:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:16:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 47 [2021-08-06 14:16:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:29,956 INFO L225 Difference]: With dead ends: 6302 [2021-08-06 14:16:29,956 INFO L226 Difference]: Without dead ends: 6264 [2021-08-06 14:16:29,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:16:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2021-08-06 14:16:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 5629. [2021-08-06 14:16:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5629 states, 5628 states have (on average 2.5600568585643213) internal successors, (14408), 5628 states have internal predecessors, (14408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 14408 transitions. [2021-08-06 14:16:30,033 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 14408 transitions. Word has length 47 [2021-08-06 14:16:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:30,033 INFO L470 AbstractCegarLoop]: Abstraction has 5629 states and 14408 transitions. [2021-08-06 14:16:30,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:16:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 14408 transitions. [2021-08-06 14:16:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:30,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:30,065 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:30,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-06 14:16:30,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:30,266 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash 642799297, now seen corresponding path program 101 times [2021-08-06 14:16:30,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:30,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429660414] [2021-08-06 14:16:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:30,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:16:30,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:30,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429660414] [2021-08-06 14:16:30,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429660414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:30,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058827763] [2021-08-06 14:16:30,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:16:30,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:30,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:30,396 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:30,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-06 14:16:34,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-06 14:16:34,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:34,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:34,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:16:34,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058827763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:34,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:34,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:16:34,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972912914] [2021-08-06 14:16:34,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:16:34,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:16:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:16:34,626 INFO L87 Difference]: Start difference. First operand 5629 states and 14408 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:34,967 INFO L93 Difference]: Finished difference Result 6534 states and 16191 transitions. [2021-08-06 14:16:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:16:34,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:16:34,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:34,976 INFO L225 Difference]: With dead ends: 6534 [2021-08-06 14:16:34,976 INFO L226 Difference]: Without dead ends: 6522 [2021-08-06 14:16:34,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:16:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-08-06 14:16:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 5631. [2021-08-06 14:16:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.5595026642984013) internal successors, (14410), 5630 states have internal predecessors, (14410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 14410 transitions. [2021-08-06 14:16:35,056 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 14410 transitions. Word has length 47 [2021-08-06 14:16:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:35,056 INFO L470 AbstractCegarLoop]: Abstraction has 5631 states and 14410 transitions. [2021-08-06 14:16:35,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 14410 transitions. [2021-08-06 14:16:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:35,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:35,062 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:35,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-06 14:16:35,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:35,263 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:35,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1510250665, now seen corresponding path program 102 times [2021-08-06 14:16:35,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:35,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906714474] [2021-08-06 14:16:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:35,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:35,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:35,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906714474] [2021-08-06 14:16:35,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906714474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:35,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482270472] [2021-08-06 14:16:35,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:16:35,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:35,399 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:35,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-06 14:16:39,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 14:16:39,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:16:39,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:39,987 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-06 14:16:39,988 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 30 treesize of output 30 [2021-08-06 14:16:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:40,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482270472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:40,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:40,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-08-06 14:16:40,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120059896] [2021-08-06 14:16:40,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:16:40,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:16:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:16:40,063 INFO L87 Difference]: Start difference. First operand 5631 states and 14410 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:44,413 INFO L93 Difference]: Finished difference Result 10926 states and 25819 transitions. [2021-08-06 14:16:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-06 14:16:44,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:16:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:44,430 INFO L225 Difference]: With dead ends: 10926 [2021-08-06 14:16:44,430 INFO L226 Difference]: Without dead ends: 10894 [2021-08-06 14:16:44,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7305 ImplicationChecksByTransitivity, 3093.2ms TimeCoverageRelationStatistics Valid=3122, Invalid=16060, Unknown=0, NotChecked=0, Total=19182 [2021-08-06 14:16:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10894 states. [2021-08-06 14:16:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10894 to 6818. [2021-08-06 14:16:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6818 states, 6817 states have (on average 2.6130262578847) internal successors, (17813), 6817 states have internal predecessors, (17813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 17813 transitions. [2021-08-06 14:16:44,571 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 17813 transitions. Word has length 47 [2021-08-06 14:16:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:44,571 INFO L470 AbstractCegarLoop]: Abstraction has 6818 states and 17813 transitions. [2021-08-06 14:16:44,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 17813 transitions. [2021-08-06 14:16:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:44,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:44,579 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:44,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2021-08-06 14:16:44,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-06 14:16:44,780 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1748312182, now seen corresponding path program 45 times [2021-08-06 14:16:44,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:44,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032222768] [2021-08-06 14:16:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:44,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:44,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:44,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032222768] [2021-08-06 14:16:44,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032222768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:44,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846053860] [2021-08-06 14:16:44,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:16:44,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:44,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:44,975 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:44,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-06 14:16:49,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 14:16:49,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:16:49,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:49,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846053860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:49,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:49,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:16:49,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728955589] [2021-08-06 14:16:49,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:16:49,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:16:49,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:16:49,751 INFO L87 Difference]: Start difference. First operand 6818 states and 17813 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:49,948 INFO L93 Difference]: Finished difference Result 9082 states and 22740 transitions. [2021-08-06 14:16:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:16:49,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:16:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:49,963 INFO L225 Difference]: With dead ends: 9082 [2021-08-06 14:16:49,963 INFO L226 Difference]: Without dead ends: 9074 [2021-08-06 14:16:49,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:16:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9074 states. [2021-08-06 14:16:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9074 to 7206. [2021-08-06 14:16:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 2.6352532963219986) internal successors, (18987), 7205 states have internal predecessors, (18987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 18987 transitions. [2021-08-06 14:16:50,107 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 18987 transitions. Word has length 47 [2021-08-06 14:16:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:50,108 INFO L470 AbstractCegarLoop]: Abstraction has 7206 states and 18987 transitions. [2021-08-06 14:16:50,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 18987 transitions. [2021-08-06 14:16:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:50,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:50,115 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:50,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-06 14:16:50,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-06 14:16:50,316 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:50,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1924774704, now seen corresponding path program 46 times [2021-08-06 14:16:50,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:50,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042685126] [2021-08-06 14:16:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:50,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:50,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:50,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042685126] [2021-08-06 14:16:50,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042685126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:50,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223211218] [2021-08-06 14:16:50,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:16:50,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:50,459 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:50,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-06 14:16:54,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:16:54,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:54,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:16:54,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:16:55,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223211218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:55,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:55,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:16:55,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210599501] [2021-08-06 14:16:55,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:16:55,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:16:55,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:16:55,225 INFO L87 Difference]: Start difference. First operand 7206 states and 18987 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:55,480 INFO L93 Difference]: Finished difference Result 10075 states and 24998 transitions. [2021-08-06 14:16:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:16:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:16:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:55,501 INFO L225 Difference]: With dead ends: 10075 [2021-08-06 14:16:55,501 INFO L226 Difference]: Without dead ends: 10075 [2021-08-06 14:16:55,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:16:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-08-06 14:16:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 7212. [2021-08-06 14:16:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 7211 states have (on average 2.6345860490916655) internal successors, (18998), 7211 states have internal predecessors, (18998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 18998 transitions. [2021-08-06 14:16:55,650 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 18998 transitions. Word has length 47 [2021-08-06 14:16:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:55,650 INFO L470 AbstractCegarLoop]: Abstraction has 7212 states and 18998 transitions. [2021-08-06 14:16:55,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 18998 transitions. [2021-08-06 14:16:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:16:55,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:55,657 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:55,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-06 14:16:55,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:55,858 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:16:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 287202248, now seen corresponding path program 47 times [2021-08-06 14:16:55,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:55,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154247584] [2021-08-06 14:16:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:55,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:56,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:56,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154247584] [2021-08-06 14:16:56,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154247584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:56,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850727351] [2021-08-06 14:16:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:16:56,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:56,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:56,003 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:56,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-06 14:17:00,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 14:17:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:00,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:17:00,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:00,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850727351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:00,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:00,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 18 [2021-08-06 14:17:00,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918132153] [2021-08-06 14:17:00,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:17:00,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:17:00,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:17:00,930 INFO L87 Difference]: Start difference. First operand 7212 states and 18998 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:01,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:01,287 INFO L93 Difference]: Finished difference Result 9475 states and 23549 transitions. [2021-08-06 14:17:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:17:01,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:17:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:01,308 INFO L225 Difference]: With dead ends: 9475 [2021-08-06 14:17:01,308 INFO L226 Difference]: Without dead ends: 9475 [2021-08-06 14:17:01,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:17:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9475 states. [2021-08-06 14:17:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9475 to 7083. [2021-08-06 14:17:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 2.6310364303868963) internal successors, (18633), 7082 states have internal predecessors, (18633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 18633 transitions. [2021-08-06 14:17:01,468 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 18633 transitions. Word has length 47 [2021-08-06 14:17:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:01,468 INFO L470 AbstractCegarLoop]: Abstraction has 7083 states and 18633 transitions. [2021-08-06 14:17:01,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 18633 transitions. [2021-08-06 14:17:01,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:01,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:01,476 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:01,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-06 14:17:01,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-08-06 14:17:01,684 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:01,684 INFO L82 PathProgramCache]: Analyzing trace with hash 22308444, now seen corresponding path program 103 times [2021-08-06 14:17:01,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:01,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177858857] [2021-08-06 14:17:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:01,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:01,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:01,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177858857] [2021-08-06 14:17:01,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177858857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:01,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463583951] [2021-08-06 14:17:01,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:17:01,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:01,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:01,836 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:01,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-06 14:17:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:06,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:17:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:06,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463583951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:06,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:06,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:17:06,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31518536] [2021-08-06 14:17:06,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:17:06,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:17:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:17:06,742 INFO L87 Difference]: Start difference. First operand 7083 states and 18633 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:06,937 INFO L93 Difference]: Finished difference Result 7804 states and 19985 transitions. [2021-08-06 14:17:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:17:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:17:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:06,954 INFO L225 Difference]: With dead ends: 7804 [2021-08-06 14:17:06,954 INFO L226 Difference]: Without dead ends: 7786 [2021-08-06 14:17:06,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:17:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7786 states. [2021-08-06 14:17:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7786 to 7083. [2021-08-06 14:17:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 2.630048009036995) internal successors, (18626), 7082 states have internal predecessors, (18626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 18626 transitions. [2021-08-06 14:17:07,107 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 18626 transitions. Word has length 47 [2021-08-06 14:17:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:07,107 INFO L470 AbstractCegarLoop]: Abstraction has 7083 states and 18626 transitions. [2021-08-06 14:17:07,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 18626 transitions. [2021-08-06 14:17:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:07,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:07,114 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:07,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-08-06 14:17:07,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:07,315 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:07,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1071762469, now seen corresponding path program 48 times [2021-08-06 14:17:07,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:07,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29071246] [2021-08-06 14:17:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:07,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:17:07,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:07,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29071246] [2021-08-06 14:17:07,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29071246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:07,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898158537] [2021-08-06 14:17:07,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:17:07,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:07,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:07,489 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:07,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-06 14:17:12,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 14:17:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:17:12,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898158537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:12,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:12,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:17:12,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514489089] [2021-08-06 14:17:12,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:17:12,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:12,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:17:12,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:17:12,386 INFO L87 Difference]: Start difference. First operand 7083 states and 18626 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:17:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:12,812 INFO L93 Difference]: Finished difference Result 8368 states and 21235 transitions. [2021-08-06 14:17:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:17:12,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 47 [2021-08-06 14:17:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:12,827 INFO L225 Difference]: With dead ends: 8368 [2021-08-06 14:17:12,827 INFO L226 Difference]: Without dead ends: 8339 [2021-08-06 14:17:12,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:17:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2021-08-06 14:17:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 7212. [2021-08-06 14:17:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 7211 states have (on average 2.627097489945916) internal successors, (18944), 7211 states have internal predecessors, (18944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 18944 transitions. [2021-08-06 14:17:12,940 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 18944 transitions. Word has length 47 [2021-08-06 14:17:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:12,940 INFO L470 AbstractCegarLoop]: Abstraction has 7212 states and 18944 transitions. [2021-08-06 14:17:12,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:17:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 18944 transitions. [2021-08-06 14:17:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:12,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:12,946 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:12,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:13,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-06 14:17:13,157 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash 428570523, now seen corresponding path program 104 times [2021-08-06 14:17:13,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:13,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921339462] [2021-08-06 14:17:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:13,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:17:13,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:13,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921339462] [2021-08-06 14:17:13,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921339462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:13,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756879953] [2021-08-06 14:17:13,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:17:13,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:13,311 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:13,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-06 14:17:17,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:17:17,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:17:18,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756879953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:18,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:18,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 14:17:18,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019625771] [2021-08-06 14:17:18,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:17:18,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:17:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:17:18,268 INFO L87 Difference]: Start difference. First operand 7212 states and 18944 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:17:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:18,741 INFO L93 Difference]: Finished difference Result 7881 states and 20155 transitions. [2021-08-06 14:17:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:17:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 47 [2021-08-06 14:17:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:18,755 INFO L225 Difference]: With dead ends: 7881 [2021-08-06 14:17:18,755 INFO L226 Difference]: Without dead ends: 7825 [2021-08-06 14:17:18,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:17:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2021-08-06 14:17:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7180. [2021-08-06 14:17:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7180 states, 7179 states have (on average 2.623206574731857) internal successors, (18832), 7179 states have internal predecessors, (18832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7180 states to 7180 states and 18832 transitions. [2021-08-06 14:17:18,869 INFO L78 Accepts]: Start accepts. Automaton has 7180 states and 18832 transitions. Word has length 47 [2021-08-06 14:17:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:18,869 INFO L470 AbstractCegarLoop]: Abstraction has 7180 states and 18832 transitions. [2021-08-06 14:17:18,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:17:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7180 states and 18832 transitions. [2021-08-06 14:17:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:18,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:18,876 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:18,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:19,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-06 14:17:19,077 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash -342265144, now seen corresponding path program 49 times [2021-08-06 14:17:19,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:19,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500975938] [2021-08-06 14:17:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:19,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:19,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:19,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500975938] [2021-08-06 14:17:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500975938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:19,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704345754] [2021-08-06 14:17:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:17:19,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:19,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:19,233 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:19,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-06 14:17:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:17:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:23,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704345754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:23,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:23,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:17:23,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166753517] [2021-08-06 14:17:23,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:17:23,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:23,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:17:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:17:23,852 INFO L87 Difference]: Start difference. First operand 7180 states and 18832 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:24,062 INFO L93 Difference]: Finished difference Result 8894 states and 22329 transitions. [2021-08-06 14:17:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:17:24,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:17:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:24,075 INFO L225 Difference]: With dead ends: 8894 [2021-08-06 14:17:24,076 INFO L226 Difference]: Without dead ends: 8884 [2021-08-06 14:17:24,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:17:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8884 states. [2021-08-06 14:17:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8884 to 7296. [2021-08-06 14:17:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 7295 states have (on average 2.623029472241261) internal successors, (19135), 7295 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19135 transitions. [2021-08-06 14:17:24,182 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19135 transitions. Word has length 47 [2021-08-06 14:17:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:24,182 INFO L470 AbstractCegarLoop]: Abstraction has 7296 states and 19135 transitions. [2021-08-06 14:17:24,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19135 transitions. [2021-08-06 14:17:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:24,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:24,188 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:24,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:24,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-06 14:17:24,389 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2063693065, now seen corresponding path program 105 times [2021-08-06 14:17:24,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:24,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068933903] [2021-08-06 14:17:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:24,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:17:24,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:24,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068933903] [2021-08-06 14:17:24,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068933903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:24,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299657763] [2021-08-06 14:17:24,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:17:24,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:24,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:24,564 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:24,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-06 14:17:28,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:17:28,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:17:29,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299657763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:29,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:29,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:17:29,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441640112] [2021-08-06 14:17:29,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:17:29,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:17:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:17:29,143 INFO L87 Difference]: Start difference. First operand 7296 states and 19135 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:17:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:29,538 INFO L93 Difference]: Finished difference Result 8352 states and 21220 transitions. [2021-08-06 14:17:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:17:29,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 47 [2021-08-06 14:17:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:29,548 INFO L225 Difference]: With dead ends: 8352 [2021-08-06 14:17:29,549 INFO L226 Difference]: Without dead ends: 8340 [2021-08-06 14:17:29,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:17:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-08-06 14:17:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 7303. [2021-08-06 14:17:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 7302 states have (on average 2.620241029854834) internal successors, (19133), 7302 states have internal predecessors, (19133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 19133 transitions. [2021-08-06 14:17:29,652 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 19133 transitions. Word has length 47 [2021-08-06 14:17:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:29,652 INFO L470 AbstractCegarLoop]: Abstraction has 7303 states and 19133 transitions. [2021-08-06 14:17:29,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:17:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 19133 transitions. [2021-08-06 14:17:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:29,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:29,659 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:29,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:29,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-06 14:17:29,859 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1833323160, now seen corresponding path program 106 times [2021-08-06 14:17:29,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:29,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437369768] [2021-08-06 14:17:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:29,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:29,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:29,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437369768] [2021-08-06 14:17:29,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437369768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:29,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806146606] [2021-08-06 14:17:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:17:29,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:29,993 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:29,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-06 14:17:34,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:17:34,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:17:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:17:34,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806146606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:34,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:34,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:17:34,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934648649] [2021-08-06 14:17:34,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:17:34,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:17:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:17:34,555 INFO L87 Difference]: Start difference. First operand 7303 states and 19133 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:34,719 INFO L93 Difference]: Finished difference Result 8354 states and 21067 transitions. [2021-08-06 14:17:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:17:34,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:17:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:34,732 INFO L225 Difference]: With dead ends: 8354 [2021-08-06 14:17:34,732 INFO L226 Difference]: Without dead ends: 8336 [2021-08-06 14:17:34,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:17:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-08-06 14:17:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7245. [2021-08-06 14:17:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7245 states, 7244 states have (on average 2.6130590833793486) internal successors, (18929), 7244 states have internal predecessors, (18929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7245 states to 7245 states and 18929 transitions. [2021-08-06 14:17:34,844 INFO L78 Accepts]: Start accepts. Automaton has 7245 states and 18929 transitions. Word has length 47 [2021-08-06 14:17:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:34,844 INFO L470 AbstractCegarLoop]: Abstraction has 7245 states and 18929 transitions. [2021-08-06 14:17:34,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7245 states and 18929 transitions. [2021-08-06 14:17:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:34,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:34,849 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:34,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-06 14:17:35,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-06 14:17:35,050 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:35,050 INFO L82 PathProgramCache]: Analyzing trace with hash 165193303, now seen corresponding path program 107 times [2021-08-06 14:17:35,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:35,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557255464] [2021-08-06 14:17:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:35,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:17:35,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:35,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557255464] [2021-08-06 14:17:35,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557255464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:35,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701893313] [2021-08-06 14:17:35,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:17:35,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:35,182 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:35,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-06 14:17:39,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:17:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:17:39,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701893313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:39,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:39,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:17:39,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897300070] [2021-08-06 14:17:39,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:17:39,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:17:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:17:39,779 INFO L87 Difference]: Start difference. First operand 7245 states and 18929 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:17:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:40,221 INFO L93 Difference]: Finished difference Result 9067 states and 22634 transitions. [2021-08-06 14:17:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:17:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 47 [2021-08-06 14:17:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:40,237 INFO L225 Difference]: With dead ends: 9067 [2021-08-06 14:17:40,237 INFO L226 Difference]: Without dead ends: 9025 [2021-08-06 14:17:40,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:17:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-08-06 14:17:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7248. [2021-08-06 14:17:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 2.6123913343452463) internal successors, (18932), 7247 states have internal predecessors, (18932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 18932 transitions. [2021-08-06 14:17:40,353 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 18932 transitions. Word has length 47 [2021-08-06 14:17:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:40,353 INFO L470 AbstractCegarLoop]: Abstraction has 7248 states and 18932 transitions. [2021-08-06 14:17:40,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:17:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 18932 transitions. [2021-08-06 14:17:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:40,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:40,359 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:40,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:40,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:40,560 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -805456510, now seen corresponding path program 108 times [2021-08-06 14:17:40,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:40,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19763370] [2021-08-06 14:17:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:40,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:40,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:40,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19763370] [2021-08-06 14:17:40,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19763370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:40,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160680431] [2021-08-06 14:17:40,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:17:40,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:40,692 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:40,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-06 14:17:45,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 14:17:45,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:45,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:17:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:17:45,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160680431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:45,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:45,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:17:45,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738196315] [2021-08-06 14:17:45,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:17:45,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:17:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:17:45,708 INFO L87 Difference]: Start difference. First operand 7248 states and 18932 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:45,975 INFO L93 Difference]: Finished difference Result 8316 states and 20896 transitions. [2021-08-06 14:17:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:17:45,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:17:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:45,992 INFO L225 Difference]: With dead ends: 8316 [2021-08-06 14:17:45,993 INFO L226 Difference]: Without dead ends: 8292 [2021-08-06 14:17:45,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:17:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8292 states. [2021-08-06 14:17:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8292 to 7248. [2021-08-06 14:17:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 2.6104595004829583) internal successors, (18918), 7247 states have internal predecessors, (18918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 18918 transitions. [2021-08-06 14:17:46,136 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 18918 transitions. Word has length 47 [2021-08-06 14:17:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 7248 states and 18918 transitions. [2021-08-06 14:17:46,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 18918 transitions. [2021-08-06 14:17:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:46,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:46,144 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:46,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-08-06 14:17:46,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-08-06 14:17:46,344 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2111788211, now seen corresponding path program 109 times [2021-08-06 14:17:46,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:46,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444849222] [2021-08-06 14:17:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:46,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:46,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:46,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444849222] [2021-08-06 14:17:46,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444849222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:46,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396321723] [2021-08-06 14:17:46,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:17:46,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:46,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:46,499 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:46,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-06 14:17:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:51,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:51,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396321723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:51,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:51,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:17:51,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599928150] [2021-08-06 14:17:51,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:17:51,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:17:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:17:51,610 INFO L87 Difference]: Start difference. First operand 7248 states and 18918 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:17:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:52,153 INFO L93 Difference]: Finished difference Result 9200 states and 22865 transitions. [2021-08-06 14:17:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:17:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 47 [2021-08-06 14:17:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:52,173 INFO L225 Difference]: With dead ends: 9200 [2021-08-06 14:17:52,173 INFO L226 Difference]: Without dead ends: 9146 [2021-08-06 14:17:52,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:17:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9146 states. [2021-08-06 14:17:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9146 to 7223. [2021-08-06 14:17:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7223 states, 7222 states have (on average 2.607034062586541) internal successors, (18828), 7222 states have internal predecessors, (18828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 18828 transitions. [2021-08-06 14:17:52,347 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 18828 transitions. Word has length 47 [2021-08-06 14:17:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:52,347 INFO L470 AbstractCegarLoop]: Abstraction has 7223 states and 18828 transitions. [2021-08-06 14:17:52,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:17:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 18828 transitions. [2021-08-06 14:17:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:52,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:52,355 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:52,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:52,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-06 14:17:52,556 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1251846284, now seen corresponding path program 50 times [2021-08-06 14:17:52,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:52,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615020009] [2021-08-06 14:17:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:52,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:52,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:52,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615020009] [2021-08-06 14:17:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615020009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:52,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184690878] [2021-08-06 14:17:52,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:17:52,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:52,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:52,700 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:52,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-06 14:17:57,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:17:57,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:17:57,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:57,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184690878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:57,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:57,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:17:57,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322920291] [2021-08-06 14:17:57,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:17:57,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:17:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:17:57,810 INFO L87 Difference]: Start difference. First operand 7223 states and 18828 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:58,097 INFO L93 Difference]: Finished difference Result 10686 states and 26305 transitions. [2021-08-06 14:17:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:17:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:17:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:58,114 INFO L225 Difference]: With dead ends: 10686 [2021-08-06 14:17:58,115 INFO L226 Difference]: Without dead ends: 10686 [2021-08-06 14:17:58,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:17:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10686 states. [2021-08-06 14:17:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10686 to 7317. [2021-08-06 14:17:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7317 states, 7316 states have (on average 2.6123564789502463) internal successors, (19112), 7316 states have internal predecessors, (19112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 19112 transitions. [2021-08-06 14:17:58,254 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 19112 transitions. Word has length 47 [2021-08-06 14:17:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:58,254 INFO L470 AbstractCegarLoop]: Abstraction has 7317 states and 19112 transitions. [2021-08-06 14:17:58,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 19112 transitions. [2021-08-06 14:17:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:17:58,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:58,260 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:58,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-06 14:17:58,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-08-06 14:17:58,461 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:17:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash -385726172, now seen corresponding path program 51 times [2021-08-06 14:17:58,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:58,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335336943] [2021-08-06 14:17:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:58,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 65 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:17:58,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:58,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335336943] [2021-08-06 14:17:58,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335336943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:58,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358012472] [2021-08-06 14:17:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:17:58,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:58,605 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:58,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-06 14:18:03,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 14:18:03,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:18:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:03,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358012472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:03,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:03,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 14:18:03,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893444141] [2021-08-06 14:18:03,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:18:03,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:03,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:18:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:18:03,859 INFO L87 Difference]: Start difference. First operand 7317 states and 19112 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:04,175 INFO L93 Difference]: Finished difference Result 10564 states and 26009 transitions. [2021-08-06 14:18:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:18:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:18:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:04,196 INFO L225 Difference]: With dead ends: 10564 [2021-08-06 14:18:04,196 INFO L226 Difference]: Without dead ends: 10564 [2021-08-06 14:18:04,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:18:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10564 states. [2021-08-06 14:18:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10564 to 7325. [2021-08-06 14:18:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7325 states, 7324 states have (on average 2.612370289459312) internal successors, (19133), 7324 states have internal predecessors, (19133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7325 states to 7325 states and 19133 transitions. [2021-08-06 14:18:04,353 INFO L78 Accepts]: Start accepts. Automaton has 7325 states and 19133 transitions. Word has length 47 [2021-08-06 14:18:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:04,353 INFO L470 AbstractCegarLoop]: Abstraction has 7325 states and 19133 transitions. [2021-08-06 14:18:04,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7325 states and 19133 transitions. [2021-08-06 14:18:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:04,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:04,360 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:04,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-08-06 14:18:04,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:04,561 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2075721336, now seen corresponding path program 52 times [2021-08-06 14:18:04,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:04,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442132409] [2021-08-06 14:18:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:04,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:04,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:04,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442132409] [2021-08-06 14:18:04,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442132409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:04,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045808848] [2021-08-06 14:18:04,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:18:04,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:04,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:04,719 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:04,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-06 14:18:09,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:18:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:09,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:18:09,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045808848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:09,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:09,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 14:18:09,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14496501] [2021-08-06 14:18:09,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:18:09,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:18:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:18:09,942 INFO L87 Difference]: Start difference. First operand 7325 states and 19133 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:10,297 INFO L93 Difference]: Finished difference Result 9288 states and 23140 transitions. [2021-08-06 14:18:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:18:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:18:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:10,313 INFO L225 Difference]: With dead ends: 9288 [2021-08-06 14:18:10,314 INFO L226 Difference]: Without dead ends: 9288 [2021-08-06 14:18:10,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:18:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9288 states. [2021-08-06 14:18:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9288 to 7149. [2021-08-06 14:18:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 2.6110800223838835) internal successors, (18664), 7148 states have internal predecessors, (18664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 18664 transitions. [2021-08-06 14:18:10,442 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 18664 transitions. Word has length 47 [2021-08-06 14:18:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:10,442 INFO L470 AbstractCegarLoop]: Abstraction has 7149 states and 18664 transitions. [2021-08-06 14:18:10,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 18664 transitions. [2021-08-06 14:18:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:10,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:10,448 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:10,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-06 14:18:10,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:10,649 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1796576408, now seen corresponding path program 110 times [2021-08-06 14:18:10,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:10,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615655043] [2021-08-06 14:18:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:10,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:10,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:10,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615655043] [2021-08-06 14:18:10,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615655043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:10,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351926828] [2021-08-06 14:18:10,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:18:10,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:10,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:10,805 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:10,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-06 14:18:15,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:18:15,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:18:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:16,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351926828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:16,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:16,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:18:16,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224768090] [2021-08-06 14:18:16,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:18:16,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:16,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:18:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:18:16,167 INFO L87 Difference]: Start difference. First operand 7149 states and 18664 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:16,358 INFO L93 Difference]: Finished difference Result 8042 states and 20331 transitions. [2021-08-06 14:18:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:18:16,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:18:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:16,371 INFO L225 Difference]: With dead ends: 8042 [2021-08-06 14:18:16,371 INFO L226 Difference]: Without dead ends: 8003 [2021-08-06 14:18:16,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:18:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8003 states. [2021-08-06 14:18:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8003 to 7149. [2021-08-06 14:18:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 2.609681029658646) internal successors, (18654), 7148 states have internal predecessors, (18654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 18654 transitions. [2021-08-06 14:18:16,480 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 18654 transitions. Word has length 47 [2021-08-06 14:18:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:16,480 INFO L470 AbstractCegarLoop]: Abstraction has 7149 states and 18654 transitions. [2021-08-06 14:18:16,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 18654 transitions. [2021-08-06 14:18:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:16,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:16,487 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:16,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:16,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-06 14:18:16,687 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 684706549, now seen corresponding path program 53 times [2021-08-06 14:18:16,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:16,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906215767] [2021-08-06 14:18:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:16,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:18:16,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:16,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906215767] [2021-08-06 14:18:16,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906215767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:16,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990392762] [2021-08-06 14:18:16,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:18:16,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:16,825 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:16,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-06 14:18:21,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-06 14:18:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:21,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:18:21,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990392762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:21,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:21,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:18:21,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196808281] [2021-08-06 14:18:21,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:18:21,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:18:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:18:21,587 INFO L87 Difference]: Start difference. First operand 7149 states and 18654 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:18:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:21,984 INFO L93 Difference]: Finished difference Result 8245 states and 20865 transitions. [2021-08-06 14:18:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:18:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 47 [2021-08-06 14:18:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:22,001 INFO L225 Difference]: With dead ends: 8245 [2021-08-06 14:18:22,001 INFO L226 Difference]: Without dead ends: 8221 [2021-08-06 14:18:22,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8221 states. [2021-08-06 14:18:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8221 to 7277. [2021-08-06 14:18:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7277 states, 7276 states have (on average 2.6065145684442) internal successors, (18965), 7276 states have internal predecessors, (18965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7277 states to 7277 states and 18965 transitions. [2021-08-06 14:18:22,133 INFO L78 Accepts]: Start accepts. Automaton has 7277 states and 18965 transitions. Word has length 47 [2021-08-06 14:18:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:22,134 INFO L470 AbstractCegarLoop]: Abstraction has 7277 states and 18965 transitions. [2021-08-06 14:18:22,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:18:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 7277 states and 18965 transitions. [2021-08-06 14:18:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:22,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:22,142 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:22,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2021-08-06 14:18:22,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-06 14:18:22,342 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash -868990308, now seen corresponding path program 111 times [2021-08-06 14:18:22,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:22,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573731437] [2021-08-06 14:18:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:22,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:22,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:22,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573731437] [2021-08-06 14:18:22,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573731437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:22,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529538316] [2021-08-06 14:18:22,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:18:22,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:22,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:22,457 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:22,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-06 14:18:26,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-06 14:18:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:18:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:18:27,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529538316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:27,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:27,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:18:27,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155620763] [2021-08-06 14:18:27,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:18:27,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:18:27,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:18:27,283 INFO L87 Difference]: Start difference. First operand 7277 states and 18965 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:27,435 INFO L93 Difference]: Finished difference Result 8464 states and 21190 transitions. [2021-08-06 14:18:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:18:27,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:18:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:27,449 INFO L225 Difference]: With dead ends: 8464 [2021-08-06 14:18:27,449 INFO L226 Difference]: Without dead ends: 8461 [2021-08-06 14:18:27,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:18:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8461 states. [2021-08-06 14:18:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8461 to 7269. [2021-08-06 14:18:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7268 states have (on average 2.6049807374793614) internal successors, (18933), 7268 states have internal predecessors, (18933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 18933 transitions. [2021-08-06 14:18:27,571 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 18933 transitions. Word has length 47 [2021-08-06 14:18:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:27,571 INFO L470 AbstractCegarLoop]: Abstraction has 7269 states and 18933 transitions. [2021-08-06 14:18:27,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 18933 transitions. [2021-08-06 14:18:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:27,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:27,578 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:27,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-06 14:18:27,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:27,778 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:27,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:27,779 INFO L82 PathProgramCache]: Analyzing trace with hash -661927742, now seen corresponding path program 112 times [2021-08-06 14:18:27,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:27,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102671044] [2021-08-06 14:18:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:27,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:27,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:27,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102671044] [2021-08-06 14:18:27,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102671044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:27,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614369137] [2021-08-06 14:18:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:18:27,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:27,949 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:27,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-06 14:18:32,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:18:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:18:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:18:33,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614369137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:33,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:33,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:18:33,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065999267] [2021-08-06 14:18:33,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:18:33,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:33,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:18:33,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:18:33,077 INFO L87 Difference]: Start difference. First operand 7269 states and 18933 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 14:18:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:33,271 INFO L93 Difference]: Finished difference Result 8492 states and 21207 transitions. [2021-08-06 14:18:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:18:33,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-08-06 14:18:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:33,287 INFO L225 Difference]: With dead ends: 8492 [2021-08-06 14:18:33,287 INFO L226 Difference]: Without dead ends: 8474 [2021-08-06 14:18:33,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:18:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2021-08-06 14:18:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 7269. [2021-08-06 14:18:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7268 states have (on average 2.60305448541552) internal successors, (18919), 7268 states have internal predecessors, (18919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 18919 transitions. [2021-08-06 14:18:33,438 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 18919 transitions. Word has length 47 [2021-08-06 14:18:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:33,439 INFO L470 AbstractCegarLoop]: Abstraction has 7269 states and 18919 transitions. [2021-08-06 14:18:33,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 14:18:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 18919 transitions. [2021-08-06 14:18:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:33,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:33,446 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:33,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-06 14:18:33,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-06 14:18:33,647 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2109927755, now seen corresponding path program 113 times [2021-08-06 14:18:33,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:33,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277427628] [2021-08-06 14:18:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:33,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:18:33,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:33,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277427628] [2021-08-06 14:18:33,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277427628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:33,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63265606] [2021-08-06 14:18:33,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:18:33,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:33,802 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:33,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-06 14:18:38,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-06 14:18:38,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:18:39,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63265606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:39,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:39,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 14:18:39,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203308887] [2021-08-06 14:18:39,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:18:39,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:39,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:18:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:18:39,146 INFO L87 Difference]: Start difference. First operand 7269 states and 18919 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:18:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:39,616 INFO L93 Difference]: Finished difference Result 7850 states and 19945 transitions. [2021-08-06 14:18:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:18:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 47 [2021-08-06 14:18:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:39,629 INFO L225 Difference]: With dead ends: 7850 [2021-08-06 14:18:39,629 INFO L226 Difference]: Without dead ends: 7776 [2021-08-06 14:18:39,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-08-06 14:18:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 7243. [2021-08-06 14:18:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7243 states, 7242 states have (on average 2.5990057995029) internal successors, (18822), 7242 states have internal predecessors, (18822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7243 states to 7243 states and 18822 transitions. [2021-08-06 14:18:39,742 INFO L78 Accepts]: Start accepts. Automaton has 7243 states and 18822 transitions. Word has length 47 [2021-08-06 14:18:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:39,742 INFO L470 AbstractCegarLoop]: Abstraction has 7243 states and 18822 transitions. [2021-08-06 14:18:39,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:18:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7243 states and 18822 transitions. [2021-08-06 14:18:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:39,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:39,748 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:39,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:39,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-06 14:18:39,949 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1571503361, now seen corresponding path program 114 times [2021-08-06 14:18:39,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:39,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313356527] [2021-08-06 14:18:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:39,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:18:40,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:40,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313356527] [2021-08-06 14:18:40,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313356527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:40,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211998174] [2021-08-06 14:18:40,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:18:40,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:40,095 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:40,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-06 14:18:45,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-06 14:18:45,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:45,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:18:45,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211998174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:45,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:45,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 14:18:45,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648697586] [2021-08-06 14:18:45,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:18:45,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:45,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:18:45,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:18:45,476 INFO L87 Difference]: Start difference. First operand 7243 states and 18822 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:45,894 INFO L93 Difference]: Finished difference Result 8231 states and 20773 transitions. [2021-08-06 14:18:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:18:45,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:18:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:45,910 INFO L225 Difference]: With dead ends: 8231 [2021-08-06 14:18:45,910 INFO L226 Difference]: Without dead ends: 8219 [2021-08-06 14:18:45,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2021-08-06 14:18:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 7279. [2021-08-06 14:18:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7279 states, 7278 states have (on average 2.597829073921407) internal successors, (18907), 7278 states have internal predecessors, (18907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7279 states to 7279 states and 18907 transitions. [2021-08-06 14:18:46,037 INFO L78 Accepts]: Start accepts. Automaton has 7279 states and 18907 transitions. Word has length 47 [2021-08-06 14:18:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:46,038 INFO L470 AbstractCegarLoop]: Abstraction has 7279 states and 18907 transitions. [2021-08-06 14:18:46,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7279 states and 18907 transitions. [2021-08-06 14:18:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:46,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:46,044 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:46,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-06 14:18:46,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-08-06 14:18:46,245 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:46,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:46,245 INFO L82 PathProgramCache]: Analyzing trace with hash -581546601, now seen corresponding path program 115 times [2021-08-06 14:18:46,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:46,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676684819] [2021-08-06 14:18:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:46,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:18:46,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:46,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676684819] [2021-08-06 14:18:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676684819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:46,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779757181] [2021-08-06 14:18:46,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:18:46,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:46,431 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:46,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-06 14:18:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:51,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:18:51,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779757181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:51,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:51,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 14:18:51,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842861215] [2021-08-06 14:18:51,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:18:51,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:18:51,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:18:51,523 INFO L87 Difference]: Start difference. First operand 7279 states and 18907 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:18:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:52,042 INFO L93 Difference]: Finished difference Result 9423 states and 23356 transitions. [2021-08-06 14:18:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:18:52,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 47 [2021-08-06 14:18:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:52,055 INFO L225 Difference]: With dead ends: 9423 [2021-08-06 14:18:52,055 INFO L226 Difference]: Without dead ends: 9369 [2021-08-06 14:18:52,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:18:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-08-06 14:18:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 7399. [2021-08-06 14:18:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 2.598269802649365) internal successors, (19222), 7398 states have internal predecessors, (19222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 19222 transitions. [2021-08-06 14:18:52,229 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 19222 transitions. Word has length 47 [2021-08-06 14:18:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:52,229 INFO L470 AbstractCegarLoop]: Abstraction has 7399 states and 19222 transitions. [2021-08-06 14:18:52,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:18:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 19222 transitions. [2021-08-06 14:18:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:52,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:52,235 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:52,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-06 14:18:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:52,436 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:52,436 INFO L82 PathProgramCache]: Analyzing trace with hash 951012508, now seen corresponding path program 116 times [2021-08-06 14:18:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:52,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693927560] [2021-08-06 14:18:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:52,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:52,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:52,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693927560] [2021-08-06 14:18:52,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693927560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:52,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937023723] [2021-08-06 14:18:52,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:18:52,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:52,575 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:52,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-06 14:18:57,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:18:57,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:57,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:18:57,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:18:57,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937023723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:57,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:57,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:18:57,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187735082] [2021-08-06 14:18:57,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:18:57,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:18:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:18:57,559 INFO L87 Difference]: Start difference. First operand 7399 states and 19222 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:57,738 INFO L93 Difference]: Finished difference Result 8648 states and 21534 transitions. [2021-08-06 14:18:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:18:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:18:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:57,753 INFO L225 Difference]: With dead ends: 8648 [2021-08-06 14:18:57,753 INFO L226 Difference]: Without dead ends: 8624 [2021-08-06 14:18:57,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:18:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2021-08-06 14:18:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 7399. [2021-08-06 14:18:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 2.5969180859691807) internal successors, (19212), 7398 states have internal predecessors, (19212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 19212 transitions. [2021-08-06 14:18:57,876 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 19212 transitions. Word has length 47 [2021-08-06 14:18:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:57,877 INFO L470 AbstractCegarLoop]: Abstraction has 7399 states and 19212 transitions. [2021-08-06 14:18:57,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 19212 transitions. [2021-08-06 14:18:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:18:57,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:57,883 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:57,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-06 14:18:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-06 14:18:58,084 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:18:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:58,084 INFO L82 PathProgramCache]: Analyzing trace with hash -426710067, now seen corresponding path program 117 times [2021-08-06 14:18:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:58,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763394955] [2021-08-06 14:18:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:58,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:18:58,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:58,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763394955] [2021-08-06 14:18:58,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763394955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:58,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593776827] [2021-08-06 14:18:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:18:58,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:58,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:58,229 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:58,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-06 14:19:02,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-06 14:19:02,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:02,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:19:03,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593776827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:03,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:03,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 14:19:03,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679135054] [2021-08-06 14:19:03,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:19:03,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:19:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:19:03,155 INFO L87 Difference]: Start difference. First operand 7399 states and 19212 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 14:19:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:03,844 INFO L93 Difference]: Finished difference Result 11133 states and 27127 transitions. [2021-08-06 14:19:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:19:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 47 [2021-08-06 14:19:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:03,861 INFO L225 Difference]: With dead ends: 11133 [2021-08-06 14:19:03,861 INFO L226 Difference]: Without dead ends: 11019 [2021-08-06 14:19:03,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:19:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11019 states. [2021-08-06 14:19:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11019 to 7523. [2021-08-06 14:19:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7523 states, 7522 states have (on average 2.597314544004254) internal successors, (19537), 7522 states have internal predecessors, (19537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7523 states to 7523 states and 19537 transitions. [2021-08-06 14:19:04,005 INFO L78 Accepts]: Start accepts. Automaton has 7523 states and 19537 transitions. Word has length 47 [2021-08-06 14:19:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:04,005 INFO L470 AbstractCegarLoop]: Abstraction has 7523 states and 19537 transitions. [2021-08-06 14:19:04,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 14:19:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7523 states and 19537 transitions. [2021-08-06 14:19:04,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:04,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:04,012 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:04,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-06 14:19:04,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:04,212 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:04,212 INFO L82 PathProgramCache]: Analyzing trace with hash -40107390, now seen corresponding path program 118 times [2021-08-06 14:19:04,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:04,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377172308] [2021-08-06 14:19:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:04,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:04,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:04,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377172308] [2021-08-06 14:19:04,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377172308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:04,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443962371] [2021-08-06 14:19:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:19:04,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:04,357 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:04,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-06 14:19:09,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:19:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:19:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:19:09,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443962371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:09,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:09,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:19:09,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586673764] [2021-08-06 14:19:09,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:19:09,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:09,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:19:09,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:19:09,383 INFO L87 Difference]: Start difference. First operand 7523 states and 19537 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:09,606 INFO L93 Difference]: Finished difference Result 8809 states and 21915 transitions. [2021-08-06 14:19:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:19:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:19:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:09,619 INFO L225 Difference]: With dead ends: 8809 [2021-08-06 14:19:09,619 INFO L226 Difference]: Without dead ends: 8776 [2021-08-06 14:19:09,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:19:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-08-06 14:19:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 7362. [2021-08-06 14:19:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7362 states, 7361 states have (on average 2.5909523162613777) internal successors, (19072), 7361 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 19072 transitions. [2021-08-06 14:19:09,731 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 19072 transitions. Word has length 47 [2021-08-06 14:19:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:09,731 INFO L470 AbstractCegarLoop]: Abstraction has 7362 states and 19072 transitions. [2021-08-06 14:19:09,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 19072 transitions. [2021-08-06 14:19:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:09,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:09,737 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:09,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-06 14:19:09,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:09,945 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -486401577, now seen corresponding path program 119 times [2021-08-06 14:19:09,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:09,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127514604] [2021-08-06 14:19:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:09,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:10,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:10,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127514604] [2021-08-06 14:19:10,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127514604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:10,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419870013] [2021-08-06 14:19:10,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:19:10,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:10,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:10,145 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:10,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-06 14:19:14,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-06 14:19:14,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:14,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:15,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419870013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:15,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:15,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 14:19:15,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72392333] [2021-08-06 14:19:15,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:19:15,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:19:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:19:15,064 INFO L87 Difference]: Start difference. First operand 7362 states and 19072 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:19:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:15,590 INFO L93 Difference]: Finished difference Result 10021 states and 24455 transitions. [2021-08-06 14:19:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:19:15,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 47 [2021-08-06 14:19:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:15,607 INFO L225 Difference]: With dead ends: 10021 [2021-08-06 14:19:15,607 INFO L226 Difference]: Without dead ends: 9865 [2021-08-06 14:19:15,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:19:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9865 states. [2021-08-06 14:19:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9865 to 7097. [2021-08-06 14:19:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 2.584977452085682) internal successors, (18343), 7096 states have internal predecessors, (18343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 18343 transitions. [2021-08-06 14:19:15,725 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 18343 transitions. Word has length 47 [2021-08-06 14:19:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:15,725 INFO L470 AbstractCegarLoop]: Abstraction has 7097 states and 18343 transitions. [2021-08-06 14:19:15,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 14:19:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 18343 transitions. [2021-08-06 14:19:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:15,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:15,731 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:15,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2021-08-06 14:19:15,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:15,932 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash -724463094, now seen corresponding path program 54 times [2021-08-06 14:19:15,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:15,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921539642] [2021-08-06 14:19:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:15,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:16,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:16,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921539642] [2021-08-06 14:19:16,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921539642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:16,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474747891] [2021-08-06 14:19:16,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:19:16,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:16,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:16,050 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:16,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-06 14:19:20,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-06 14:19:20,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:19:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:21,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474747891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:21,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:21,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:19:21,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821134284] [2021-08-06 14:19:21,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:19:21,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:19:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:19:21,172 INFO L87 Difference]: Start difference. First operand 7097 states and 18343 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:21,384 INFO L93 Difference]: Finished difference Result 8778 states and 21830 transitions. [2021-08-06 14:19:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:19:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:19:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:21,398 INFO L225 Difference]: With dead ends: 8778 [2021-08-06 14:19:21,398 INFO L226 Difference]: Without dead ends: 8764 [2021-08-06 14:19:21,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:19:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-08-06 14:19:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 7340. [2021-08-06 14:19:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 2.590816187491484) internal successors, (19014), 7339 states have internal predecessors, (19014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 19014 transitions. [2021-08-06 14:19:21,505 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 19014 transitions. Word has length 47 [2021-08-06 14:19:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:21,505 INFO L470 AbstractCegarLoop]: Abstraction has 7340 states and 19014 transitions. [2021-08-06 14:19:21,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 19014 transitions. [2021-08-06 14:19:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:21,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:21,511 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:21,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2021-08-06 14:19:21,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:21,712 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1346343504, now seen corresponding path program 55 times [2021-08-06 14:19:21,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:21,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472333133] [2021-08-06 14:19:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:21,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:21,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:21,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472333133] [2021-08-06 14:19:21,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472333133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:21,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032168307] [2021-08-06 14:19:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:19:21,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:21,854 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:21,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-06 14:19:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:19:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:27,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032168307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:27,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:27,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 14:19:27,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661002729] [2021-08-06 14:19:27,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:19:27,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:19:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:19:27,424 INFO L87 Difference]: Start difference. First operand 7340 states and 19014 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:27,693 INFO L93 Difference]: Finished difference Result 10682 states and 26231 transitions. [2021-08-06 14:19:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:19:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:19:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:27,715 INFO L225 Difference]: With dead ends: 10682 [2021-08-06 14:19:27,715 INFO L226 Difference]: Without dead ends: 10682 [2021-08-06 14:19:27,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:19:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10682 states. [2021-08-06 14:19:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10682 to 7348. [2021-08-06 14:19:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7348 states, 7347 states have (on average 2.591261739485504) internal successors, (19038), 7347 states have internal predecessors, (19038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7348 states to 7348 states and 19038 transitions. [2021-08-06 14:19:27,892 INFO L78 Accepts]: Start accepts. Automaton has 7348 states and 19038 transitions. Word has length 47 [2021-08-06 14:19:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:27,893 INFO L470 AbstractCegarLoop]: Abstraction has 7348 states and 19038 transitions. [2021-08-06 14:19:27,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 7348 states and 19038 transitions. [2021-08-06 14:19:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:27,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:27,901 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:27,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:28,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-06 14:19:28,101 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:28,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1311051336, now seen corresponding path program 56 times [2021-08-06 14:19:28,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:28,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133470192] [2021-08-06 14:19:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:28,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:28,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:28,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133470192] [2021-08-06 14:19:28,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133470192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:28,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260564962] [2021-08-06 14:19:28,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:19:28,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:28,258 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:28,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-06 14:19:33,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:19:33,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:19:33,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:33,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260564962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:33,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:33,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 14:19:33,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607897982] [2021-08-06 14:19:33,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:19:33,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:19:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:19:33,957 INFO L87 Difference]: Start difference. First operand 7348 states and 19038 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:34,304 INFO L93 Difference]: Finished difference Result 11203 states and 27449 transitions. [2021-08-06 14:19:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:19:34,304 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:19:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:34,323 INFO L225 Difference]: With dead ends: 11203 [2021-08-06 14:19:34,323 INFO L226 Difference]: Without dead ends: 11203 [2021-08-06 14:19:34,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2021-08-06 14:19:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 7372. [2021-08-06 14:19:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7372 states, 7371 states have (on average 2.5931352598019264) internal successors, (19114), 7371 states have internal predecessors, (19114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 19114 transitions. [2021-08-06 14:19:34,481 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 19114 transitions. Word has length 47 [2021-08-06 14:19:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:34,481 INFO L470 AbstractCegarLoop]: Abstraction has 7372 states and 19114 transitions. [2021-08-06 14:19:34,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 19114 transitions. [2021-08-06 14:19:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:34,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:34,488 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:34,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2021-08-06 14:19:34,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-06 14:19:34,688 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash -378943828, now seen corresponding path program 57 times [2021-08-06 14:19:34,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:34,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092546113] [2021-08-06 14:19:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:34,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:34,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:34,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092546113] [2021-08-06 14:19:34,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092546113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:34,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643005564] [2021-08-06 14:19:34,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:19:34,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:34,846 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:34,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-06 14:19:40,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-06 14:19:40,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:19:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:40,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643005564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:40,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:40,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 14:19:40,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636294849] [2021-08-06 14:19:40,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:19:40,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:19:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:19:40,607 INFO L87 Difference]: Start difference. First operand 7372 states and 19114 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:40,993 INFO L93 Difference]: Finished difference Result 10495 states and 25823 transitions. [2021-08-06 14:19:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:19:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:19:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:41,012 INFO L225 Difference]: With dead ends: 10495 [2021-08-06 14:19:41,013 INFO L226 Difference]: Without dead ends: 10495 [2021-08-06 14:19:41,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:19:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-08-06 14:19:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 7389. [2021-08-06 14:19:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7389 states, 7388 states have (on average 2.5939361126150513) internal successors, (19164), 7388 states have internal predecessors, (19164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7389 states to 7389 states and 19164 transitions. [2021-08-06 14:19:41,164 INFO L78 Accepts]: Start accepts. Automaton has 7389 states and 19164 transitions. Word has length 47 [2021-08-06 14:19:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:41,165 INFO L470 AbstractCegarLoop]: Abstraction has 7389 states and 19164 transitions. [2021-08-06 14:19:41,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7389 states and 19164 transitions. [2021-08-06 14:19:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:41,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:41,172 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:41,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2021-08-06 14:19:41,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-06 14:19:41,372 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:41,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1418230840, now seen corresponding path program 58 times [2021-08-06 14:19:41,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:41,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332394917] [2021-08-06 14:19:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:41,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:41,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:41,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332394917] [2021-08-06 14:19:41,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332394917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:41,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717874564] [2021-08-06 14:19:41,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:19:41,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:41,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:41,540 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:41,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-06 14:19:46,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:19:46,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:19:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717874564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:46,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:46,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 14:19:46,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995825886] [2021-08-06 14:19:46,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:19:46,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:46,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:19:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:19:46,672 INFO L87 Difference]: Start difference. First operand 7389 states and 19164 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:46,987 INFO L93 Difference]: Finished difference Result 9134 states and 22739 transitions. [2021-08-06 14:19:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:19:46,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:19:46,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:47,001 INFO L225 Difference]: With dead ends: 9134 [2021-08-06 14:19:47,002 INFO L226 Difference]: Without dead ends: 9134 [2021-08-06 14:19:47,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:19:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9134 states. [2021-08-06 14:19:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9134 to 7022. [2021-08-06 14:19:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 7021 states have (on average 2.5879504344110527) internal successors, (18170), 7021 states have internal predecessors, (18170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 18170 transitions. [2021-08-06 14:19:47,117 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 18170 transitions. Word has length 47 [2021-08-06 14:19:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:47,117 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 18170 transitions. [2021-08-06 14:19:47,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 18170 transitions. [2021-08-06 14:19:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:47,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:47,123 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:47,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2021-08-06 14:19:47,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:47,323 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1407171292, now seen corresponding path program 120 times [2021-08-06 14:19:47,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:47,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818234574] [2021-08-06 14:19:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:47,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:47,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:47,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818234574] [2021-08-06 14:19:47,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818234574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:47,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691131112] [2021-08-06 14:19:47,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:19:47,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:47,484 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:47,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-06 14:19:52,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:19:52,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:52,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:19:52,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:52,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691131112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:52,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:52,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 14:19:52,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783485082] [2021-08-06 14:19:52,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:19:52,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:19:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:19:52,691 INFO L87 Difference]: Start difference. First operand 7022 states and 18170 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:52,911 INFO L93 Difference]: Finished difference Result 8044 states and 20082 transitions. [2021-08-06 14:19:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:19:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 14:19:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:52,926 INFO L225 Difference]: With dead ends: 8044 [2021-08-06 14:19:52,926 INFO L226 Difference]: Without dead ends: 8008 [2021-08-06 14:19:52,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:19:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2021-08-06 14:19:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7022. [2021-08-06 14:19:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 7021 states have (on average 2.587095855291269) internal successors, (18164), 7021 states have internal predecessors, (18164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 18164 transitions. [2021-08-06 14:19:53,033 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 18164 transitions. Word has length 47 [2021-08-06 14:19:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:53,033 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 18164 transitions. [2021-08-06 14:19:53,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 18164 transitions. [2021-08-06 14:19:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 14:19:53,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:53,040 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:53,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2021-08-06 14:19:53,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:53,245 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:19:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2066654619, now seen corresponding path program 59 times [2021-08-06 14:19:53,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:53,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172341503] [2021-08-06 14:19:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:53,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:19:53,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172341503] [2021-08-06 14:19:53,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172341503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890162537] [2021-08-06 14:19:53,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:19:53,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:53,435 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:53,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:19:55,617 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:19:55,617 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 14:19:56,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:56,647 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:19:56,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-08-06 14:19:56,648 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. [2021-08-06 14:19:56,652 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:19:56,653 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:19:56,657 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:19:56,657 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:19:56,660 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:19:56 BasicIcfg [2021-08-06 14:19:56,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:19:56,661 INFO L168 Benchmark]: Toolchain (without parser) took 746924.43 ms. Allocated memory was 202.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 182.2 MB in the beginning and 536.1 MB in the end (delta: -353.9 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-06 14:19:56,661 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 202.4 MB. Free memory is still 183.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:19:56,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.35 ms. Allocated memory is still 202.4 MB. Free memory was 182.1 MB in the beginning and 180.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:19:56,661 INFO L168 Benchmark]: Boogie Preprocessor took 14.49 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 179.7 MB in the end (delta: 981.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:19:56,661 INFO L168 Benchmark]: RCFGBuilder took 188.84 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 168.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 14:19:56,661 INFO L168 Benchmark]: TraceAbstraction took 746695.27 ms. Allocated memory was 202.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 167.8 MB in the beginning and 536.1 MB in the end (delta: -368.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-06 14:19:56,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2021-08-06 14:19:56,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 202.4 MB. Free memory is still 183.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.35 ms. Allocated memory is still 202.4 MB. Free memory was 182.1 MB in the beginning and 180.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.49 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 179.7 MB in the end (delta: 981.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 188.84 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 168.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 746695.27 ms. Allocated memory was 202.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 167.8 MB in the beginning and 536.1 MB in the end (delta: -368.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 746628.6ms, OverallIterations: 239, TraceHistogramMax: 7, EmptinessCheckTime: 1010.1ms, AutomataDifference: 77015.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10080 SDtfs, 34689 SDslu, 49474 SDs, 0 SdLazy, 84187 SolverSat, 3255 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 42146.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11884 GetRequests, 8089 SyntacticMatches, 438 SemanticMatches, 3357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19477 ImplicationChecksByTransitivity, 28975.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15912occurred in iteration=87, InterpolantAutomatonStates: 3324, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21631.2ms AutomataMinimizationTime, 238 MinimizatonAttempts, 239974 StatesRemovedByMinimization, 235 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 626.0ms SsaConstructionTime, 3694.5ms SatisfiabilityAnalysisTime, 84625.8ms InterpolantComputationTime, 16831 NumberOfCodeBlocks, 16810 NumberOfCodeBlocksAsserted, 1173 NumberOfCheckSat, 16364 ConstructedInterpolants, 121 QuantifiedInterpolants, 109119 SizeOfPredicates, 365 NumberOfNonLiveVariables, 19122 ConjunctsInSsa, 3475 ConjunctsInUnsatCore, 467 InterpolantComputations, 11 PerfectInterpolantSequences, 8717/24626 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