/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:45:43,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:45:43,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:45:43,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:45:43,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:45:43,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:45:43,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:45:43,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:45:43,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:45:43,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:45:43,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:45:43,759 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:45:43,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:45:43,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:45:43,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:45:43,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:45:43,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:45:43,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:45:43,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:45:43,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:45:43,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:45:43,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:45:44,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:45:44,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:45:44,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:45:44,026 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:45:44,027 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:45:44,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-08-21 12:45:44,223 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-08-21 12:45:44,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:45:44,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:45:44,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:45:44,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:45:44,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:45:44,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:45:44,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:45:44,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:45:44,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:45:44,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:45:44,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:45:44,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:45:44,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:45:44,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/1) ... [2021-08-21 12:45:44,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:45:44,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:44,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:45:44,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:45:44,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:45:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:45:44,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:45:44,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:45:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:45:44,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:45:44,344 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:45:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:45:44,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:45:44,345 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:45:44,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:45:44,448 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:45:44,449 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:45:44 BoogieIcfgContainer [2021-08-21 12:45:44,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:45:44,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:45:44,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:45:44,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:45:44,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:45:44" (1/2) ... [2021-08-21 12:45:44,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5cbdc8 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:45:44, skipping insertion in model container [2021-08-21 12:45:44,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:45:44" (2/2) ... [2021-08-21 12:45:44,454 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-08-21 12:45:44,457 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:45:44,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:45:44,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:45:44,457 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:45:44,477 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:45:44,502 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:45:44,506 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:45:44,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:45:44,512 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-08-21 12:45:44,520 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:45:44,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:44,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:44,526 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1631855703, now seen corresponding path program 1 times [2021-08-21 12:45:44,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:44,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809906072] [2021-08-21 12:45:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:44,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:44,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:44,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809906072] [2021-08-21 12:45:44,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809906072] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:44,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:44,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:45:44,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746162901] [2021-08-21 12:45:44,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:45:44,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:45:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:45:44,710 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:44,754 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-08-21 12:45:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:45:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:45:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:44,761 INFO L225 Difference]: With dead ends: 43 [2021-08-21 12:45:44,761 INFO L226 Difference]: Without dead ends: 43 [2021-08-21 12:45:44,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-21 12:45:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-08-21 12:45:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2021-08-21 12:45:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-08-21 12:45:44,781 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-08-21 12:45:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:44,782 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-08-21 12:45:44,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-08-21 12:45:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:45:44,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:44,783 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:44,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:45:44,783 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:44,784 INFO L82 PathProgramCache]: Analyzing trace with hash 703590631, now seen corresponding path program 1 times [2021-08-21 12:45:44,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:44,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749330162] [2021-08-21 12:45:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:44,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:45:44,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:44,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749330162] [2021-08-21 12:45:44,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749330162] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:45:44,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:45:44,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:45:44,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323719693] [2021-08-21 12:45:44,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:45:44,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:45:44,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:45:44,816 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) 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) [2021-08-21 12:45:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:44,835 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-08-21 12:45:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:45:44,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) 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 [2021-08-21 12:45:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:44,836 INFO L225 Difference]: With dead ends: 50 [2021-08-21 12:45:44,836 INFO L226 Difference]: Without dead ends: 50 [2021-08-21 12:45:44,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:45:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-21 12:45:44,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-21 12:45:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-08-21 12:45:44,843 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-08-21 12:45:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:44,844 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-08-21 12:45:44,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) 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) [2021-08-21 12:45:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-08-21 12:45:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:45:44,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:44,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:44,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:45:44,845 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash 917506533, now seen corresponding path program 1 times [2021-08-21 12:45:44,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:44,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52418535] [2021-08-21 12:45:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:44,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:45,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:45,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52418535] [2021-08-21 12:45:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52418535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:45,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724644706] [2021-08-21 12:45:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:45,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:45,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:45,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:45:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:45:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:45,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724644706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:45,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:45,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:45:45,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121964270] [2021-08-21 12:45:45,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:45:45,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:45:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:45:45,740 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-08-21 12:45:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:45,886 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-08-21 12:45:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:45:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-08-21 12:45:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:45,888 INFO L225 Difference]: With dead ends: 108 [2021-08-21 12:45:45,888 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 12:45:45,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:45:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 12:45:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-08-21 12:45:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-08-21 12:45:45,893 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-08-21 12:45:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:45,893 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-08-21 12:45:45,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-08-21 12:45:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-08-21 12:45:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:45:45,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:45,894 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:45,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:46,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:46,109 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1966880365, now seen corresponding path program 2 times [2021-08-21 12:45:46,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:46,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795340000] [2021-08-21 12:45:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:46,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:46,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:46,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795340000] [2021-08-21 12:45:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795340000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:46,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494696016] [2021-08-21 12:45:46,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:46,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:46,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:46,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:46,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:45:46,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:46,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:45:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:46,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494696016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:46,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:46,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:45:46,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430149993] [2021-08-21 12:45:46,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:45:46,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:45:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:45:46,685 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-08-21 12:45:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:46,943 INFO L93 Difference]: Finished difference Result 128 states and 233 transitions. [2021-08-21 12:45:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:45:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-08-21 12:45:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:46,944 INFO L225 Difference]: With dead ends: 128 [2021-08-21 12:45:46,944 INFO L226 Difference]: Without dead ends: 115 [2021-08-21 12:45:46,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:45:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-21 12:45:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 57. [2021-08-21 12:45:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-08-21 12:45:46,949 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-08-21 12:45:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:46,950 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-08-21 12:45:46,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-08-21 12:45:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-08-21 12:45:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:45:46,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:46,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:46,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 12:45:47,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 12:45:47,165 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1678017961, now seen corresponding path program 3 times [2021-08-21 12:45:47,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:47,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753194039] [2021-08-21 12:45:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:47,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:47,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:47,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753194039] [2021-08-21 12:45:47,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753194039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:47,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038767099] [2021-08-21 12:45:47,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:47,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:47,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:47,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:47,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:45:47,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:45:47,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:47,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:45:47,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:47,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038767099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:47,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:47,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:45:47,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667361952] [2021-08-21 12:45:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:45:47,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:45:47,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:45:47,749 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-08-21 12:45:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:47,916 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-08-21 12:45:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:45:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-08-21 12:45:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:47,919 INFO L225 Difference]: With dead ends: 90 [2021-08-21 12:45:47,919 INFO L226 Difference]: Without dead ends: 83 [2021-08-21 12:45:47,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:45:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-21 12:45:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-08-21 12:45:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-08-21 12:45:47,930 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-08-21 12:45:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:47,931 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-08-21 12:45:47,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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) [2021-08-21 12:45:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-08-21 12:45:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:47,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:47,936 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:47,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:48,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:48,154 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 859525155, now seen corresponding path program 4 times [2021-08-21 12:45:48,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:48,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095161983] [2021-08-21 12:45:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:48,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:48,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:48,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095161983] [2021-08-21 12:45:48,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095161983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:48,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706929279] [2021-08-21 12:45:48,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:48,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:48,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:48,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:48,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:45:48,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:48,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:48,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706929279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:48,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:48,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:48,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307301295] [2021-08-21 12:45:48,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:48,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:48,929 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:49,219 INFO L93 Difference]: Finished difference Result 112 states and 207 transitions. [2021-08-21 12:45:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:45:49,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:49,220 INFO L225 Difference]: With dead ends: 112 [2021-08-21 12:45:49,220 INFO L226 Difference]: Without dead ends: 98 [2021-08-21 12:45:49,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:45:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-21 12:45:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2021-08-21 12:45:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 58 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 108 transitions. [2021-08-21 12:45:49,223 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 108 transitions. Word has length 21 [2021-08-21 12:45:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:49,223 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 108 transitions. [2021-08-21 12:45:49,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 108 transitions. [2021-08-21 12:45:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:49,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:49,224 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:49,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:49,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:49,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1908898987, now seen corresponding path program 5 times [2021-08-21 12:45:49,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:49,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076035820] [2021-08-21 12:45:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:49,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:49,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:49,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076035820] [2021-08-21 12:45:49,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076035820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:49,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886879915] [2021-08-21 12:45:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:49,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:49,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:49,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:45:49,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:45:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886879915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:50,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:50,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:50,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482444795] [2021-08-21 12:45:50,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:50,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:50,157 INFO L87 Difference]: Start difference. First operand 59 states and 108 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:50,490 INFO L93 Difference]: Finished difference Result 142 states and 254 transitions. [2021-08-21 12:45:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:45:50,490 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:50,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:50,491 INFO L225 Difference]: With dead ends: 142 [2021-08-21 12:45:50,491 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 12:45:50,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:45:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 12:45:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 60. [2021-08-21 12:45:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2021-08-21 12:45:50,494 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 21 [2021-08-21 12:45:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:50,495 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2021-08-21 12:45:50,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2021-08-21 12:45:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:50,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:50,495 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:50,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:50,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:50,698 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1735999339, now seen corresponding path program 6 times [2021-08-21 12:45:50,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:50,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389732199] [2021-08-21 12:45:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:50,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:50,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:50,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389732199] [2021-08-21 12:45:50,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389732199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:50,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396005410] [2021-08-21 12:45:50,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:50,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:50,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:50,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:50,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:45:50,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:45:50,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:51,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396005410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:51,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:51,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:51,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948361368] [2021-08-21 12:45:51,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:51,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:51,426 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:51,751 INFO L93 Difference]: Finished difference Result 115 states and 213 transitions. [2021-08-21 12:45:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:45:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:51,752 INFO L225 Difference]: With dead ends: 115 [2021-08-21 12:45:51,752 INFO L226 Difference]: Without dead ends: 101 [2021-08-21 12:45:51,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:45:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-21 12:45:51,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 60. [2021-08-21 12:45:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2021-08-21 12:45:51,755 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 21 [2021-08-21 12:45:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:51,755 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2021-08-21 12:45:51,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2021-08-21 12:45:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:51,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:51,755 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:51,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:51,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:51,965 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1011257333, now seen corresponding path program 7 times [2021-08-21 12:45:51,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:51,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415208917] [2021-08-21 12:45:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:51,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:52,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:52,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415208917] [2021-08-21 12:45:52,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415208917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:52,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700152174] [2021-08-21 12:45:52,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:45:52,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:52,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:52,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:52,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:45:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:52,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:52,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700152174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:52,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:52,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:52,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085530803] [2021-08-21 12:45:52,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:52,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:52,681 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:52,949 INFO L93 Difference]: Finished difference Result 141 states and 254 transitions. [2021-08-21 12:45:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:45:52,950 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:52,951 INFO L225 Difference]: With dead ends: 141 [2021-08-21 12:45:52,951 INFO L226 Difference]: Without dead ends: 127 [2021-08-21 12:45:52,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:45:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-21 12:45:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2021-08-21 12:45:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-08-21 12:45:52,954 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 21 [2021-08-21 12:45:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:52,954 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-08-21 12:45:52,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-08-21 12:45:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:52,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:52,954 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:52,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:53,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:53,165 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1661326303, now seen corresponding path program 8 times [2021-08-21 12:45:53,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:53,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090008407] [2021-08-21 12:45:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:53,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:53,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:53,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090008407] [2021-08-21 12:45:53,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090008407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:53,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531064211] [2021-08-21 12:45:53,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:45:53,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:53,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:53,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:53,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:45:53,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:45:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:53,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:53,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531064211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:53,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:53,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:53,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622010945] [2021-08-21 12:45:53,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:53,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:53,933 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:54,245 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-08-21 12:45:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:45:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:54,246 INFO L225 Difference]: With dead ends: 140 [2021-08-21 12:45:54,246 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 12:45:54,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:45:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 12:45:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 66. [2021-08-21 12:45:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-08-21 12:45:54,250 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 21 [2021-08-21 12:45:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:54,251 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-08-21 12:45:54,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-08-21 12:45:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:54,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:54,251 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:54,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 12:45:54,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 12:45:54,465 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:54,465 INFO L82 PathProgramCache]: Analyzing trace with hash -399533499, now seen corresponding path program 9 times [2021-08-21 12:45:54,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:54,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098216719] [2021-08-21 12:45:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:54,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:54,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:54,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098216719] [2021-08-21 12:45:54,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098216719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:54,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194666244] [2021-08-21 12:45:54,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:45:54,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:54,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:54,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:45:54,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:45:54,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:55,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194666244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:55,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:55,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:55,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597527718] [2021-08-21 12:45:55,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:55,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:55,222 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:55,421 INFO L93 Difference]: Finished difference Result 93 states and 166 transitions. [2021-08-21 12:45:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:45:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:55,422 INFO L225 Difference]: With dead ends: 93 [2021-08-21 12:45:55,422 INFO L226 Difference]: Without dead ends: 79 [2021-08-21 12:45:55,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:45:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-21 12:45:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-08-21 12:45:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 67 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 129 transitions. [2021-08-21 12:45:55,425 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 129 transitions. Word has length 21 [2021-08-21 12:45:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:55,425 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 129 transitions. [2021-08-21 12:45:55,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 129 transitions. [2021-08-21 12:45:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:55,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:55,425 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:55,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:55,641 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:55,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1239609169, now seen corresponding path program 10 times [2021-08-21 12:45:55,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:55,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311439927] [2021-08-21 12:45:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:55,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:55,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:55,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311439927] [2021-08-21 12:45:55,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311439927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:55,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735259020] [2021-08-21 12:45:55,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:45:55,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:55,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:55,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:55,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:45:56,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:45:56,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:56,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:56,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:56,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735259020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:56,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:56,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:56,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690768956] [2021-08-21 12:45:56,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:56,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:56,396 INFO L87 Difference]: Start difference. First operand 68 states and 129 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:56,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:56,825 INFO L93 Difference]: Finished difference Result 148 states and 267 transitions. [2021-08-21 12:45:56,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:45:56,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:56,827 INFO L225 Difference]: With dead ends: 148 [2021-08-21 12:45:56,827 INFO L226 Difference]: Without dead ends: 134 [2021-08-21 12:45:56,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:45:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-21 12:45:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 72. [2021-08-21 12:45:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-08-21 12:45:56,829 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 21 [2021-08-21 12:45:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:56,830 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-08-21 12:45:56,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-08-21 12:45:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:56,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:56,830 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:56,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:57,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 12:45:57,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash -589540199, now seen corresponding path program 11 times [2021-08-21 12:45:57,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:57,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999601046] [2021-08-21 12:45:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:57,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:57,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:57,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999601046] [2021-08-21 12:45:57,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999601046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:57,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116749467] [2021-08-21 12:45:57,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:45:57,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:57,175 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:57,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:45:57,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:45:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:57,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116749467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:57,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:57,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:57,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542251973] [2021-08-21 12:45:57,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:57,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:57,825 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:58,289 INFO L93 Difference]: Finished difference Result 148 states and 263 transitions. [2021-08-21 12:45:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:45:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:58,290 INFO L225 Difference]: With dead ends: 148 [2021-08-21 12:45:58,290 INFO L226 Difference]: Without dead ends: 134 [2021-08-21 12:45:58,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:45:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-21 12:45:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 71. [2021-08-21 12:45:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 137 transitions. [2021-08-21 12:45:58,293 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 137 transitions. Word has length 21 [2021-08-21 12:45:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:58,293 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 137 transitions. [2021-08-21 12:45:58,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 137 transitions. [2021-08-21 12:45:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:58,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:58,293 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:58,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 12:45:58,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:45:58,503 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1644567295, now seen corresponding path program 12 times [2021-08-21 12:45:58,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:58,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249733095] [2021-08-21 12:45:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:58,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:45:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:58,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:45:58,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249733095] [2021-08-21 12:45:58,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249733095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:58,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327937011] [2021-08-21 12:45:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:45:58,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:45:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:45:58,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:45:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:45:58,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:45:58,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:45:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:45:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:45:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:45:59,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327937011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:45:59,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:45:59,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:45:59,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693694307] [2021-08-21 12:45:59,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:45:59,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:45:59,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:45:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:45:59,312 INFO L87 Difference]: Start difference. First operand 71 states and 137 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:59,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:45:59,688 INFO L93 Difference]: Finished difference Result 125 states and 218 transitions. [2021-08-21 12:45:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:45:59,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:45:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:45:59,690 INFO L225 Difference]: With dead ends: 125 [2021-08-21 12:45:59,690 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 12:45:59,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:45:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 12:45:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2021-08-21 12:45:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 67 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:45:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 129 transitions. [2021-08-21 12:45:59,692 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 129 transitions. Word has length 21 [2021-08-21 12:45:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:45:59,692 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 129 transitions. [2021-08-21 12:45:59,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:45:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 129 transitions. [2021-08-21 12:45:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:45:59,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:45:59,693 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:45:59,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:45:59,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:45:59,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:45:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:45:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1109337493, now seen corresponding path program 13 times [2021-08-21 12:45:59,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:45:59,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306606296] [2021-08-21 12:45:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:45:59,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:45:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:00,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:00,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306606296] [2021-08-21 12:46:00,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306606296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:00,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322874655] [2021-08-21 12:46:00,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:00,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:00,021 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:00,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:46:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:46:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322874655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:00,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:00,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:46:00,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294823150] [2021-08-21 12:46:00,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:46:00,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:46:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:46:00,751 INFO L87 Difference]: Start difference. First operand 68 states and 129 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:46:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:01,026 INFO L93 Difference]: Finished difference Result 101 states and 180 transitions. [2021-08-21 12:46:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:46:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-08-21 12:46:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:01,027 INFO L225 Difference]: With dead ends: 101 [2021-08-21 12:46:01,027 INFO L226 Difference]: Without dead ends: 69 [2021-08-21 12:46:01,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:46:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-21 12:46:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2021-08-21 12:46:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-08-21 12:46:01,029 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 21 [2021-08-21 12:46:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:01,029 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-08-21 12:46:01,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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) [2021-08-21 12:46:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-08-21 12:46:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:01,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:01,029 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:01,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:01,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:46:01,237 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash 446728737, now seen corresponding path program 14 times [2021-08-21 12:46:01,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:01,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617717896] [2021-08-21 12:46:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:01,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:01,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:01,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617717896] [2021-08-21 12:46:01,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617717896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:01,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463769022] [2021-08-21 12:46:01,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:01,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:01,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:01,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:46:01,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:01,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:01,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463769022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:02,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:02,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:02,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693833866] [2021-08-21 12:46:02,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:02,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:02,169 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:03,089 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-08-21 12:46:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:46:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:03,090 INFO L225 Difference]: With dead ends: 225 [2021-08-21 12:46:03,090 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 12:46:03,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 896.0ms TimeCoverageRelationStatistics Valid=430, Invalid=2650, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:46:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 12:46:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-08-21 12:46:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 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) [2021-08-21 12:46:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-08-21 12:46:03,093 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-08-21 12:46:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:03,094 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-08-21 12:46:03,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-08-21 12:46:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:03,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:03,094 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:03,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:03,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:03,304 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -422333271, now seen corresponding path program 15 times [2021-08-21 12:46:03,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:03,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673151935] [2021-08-21 12:46:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:03,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:03,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:03,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673151935] [2021-08-21 12:46:03,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673151935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:03,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428272876] [2021-08-21 12:46:03,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:03,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:03,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:03,481 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:03,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:46:03,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:46:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:03,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:04,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428272876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:04,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:04,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:04,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557393694] [2021-08-21 12:46:04,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:04,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:04,261 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:05,413 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-08-21 12:46:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:46:05,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:05,415 INFO L225 Difference]: With dead ends: 293 [2021-08-21 12:46:05,415 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 12:46:05,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 993.2ms TimeCoverageRelationStatistics Valid=546, Invalid=3236, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:46:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 12:46:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-08-21 12:46:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-08-21 12:46:05,419 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-08-21 12:46:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:05,419 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-08-21 12:46:05,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-08-21 12:46:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:05,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:05,420 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:05,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:05,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:46:05,633 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1687261131, now seen corresponding path program 16 times [2021-08-21 12:46:05,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:05,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525173744] [2021-08-21 12:46:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:05,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:05,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:05,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525173744] [2021-08-21 12:46:05,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525173744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:05,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628011884] [2021-08-21 12:46:05,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:05,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:05,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:05,821 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:05,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:46:06,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:06,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:06,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628011884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:06,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:06,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:06,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783645448] [2021-08-21 12:46:06,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:06,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:06,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:06,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:06,612 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:07,586 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-08-21 12:46:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:46:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:07,587 INFO L225 Difference]: With dead ends: 263 [2021-08-21 12:46:07,587 INFO L226 Difference]: Without dead ends: 236 [2021-08-21 12:46:07,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 868.5ms TimeCoverageRelationStatistics Valid=502, Invalid=2804, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:46:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-21 12:46:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-08-21 12:46:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-08-21 12:46:07,591 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-08-21 12:46:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:07,591 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-08-21 12:46:07,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-08-21 12:46:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:07,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:07,591 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:07,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:07,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:46:07,797 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash -551075859, now seen corresponding path program 17 times [2021-08-21 12:46:07,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:07,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384192894] [2021-08-21 12:46:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:07,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:07,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:07,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384192894] [2021-08-21 12:46:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384192894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:07,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876301325] [2021-08-21 12:46:07,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:07,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:07,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:07,964 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:07,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:46:08,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:46:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:08,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:08,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876301325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:08,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:08,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:08,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646071738] [2021-08-21 12:46:08,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:08,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:08,771 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:09,791 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-08-21 12:46:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 12:46:09,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:09,792 INFO L225 Difference]: With dead ends: 280 [2021-08-21 12:46:09,793 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 12:46:09,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 917.9ms TimeCoverageRelationStatistics Valid=546, Invalid=2876, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:46:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 12:46:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-08-21 12:46:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-08-21 12:46:09,796 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-08-21 12:46:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:09,797 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-08-21 12:46:09,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-08-21 12:46:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:09,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:09,797 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:09,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:09,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:09,998 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:09,998 INFO L82 PathProgramCache]: Analyzing trace with hash 98993111, now seen corresponding path program 18 times [2021-08-21 12:46:09,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:09,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667735478] [2021-08-21 12:46:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:09,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:10,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:10,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667735478] [2021-08-21 12:46:10,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667735478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:10,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36409180] [2021-08-21 12:46:10,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:10,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:10,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:10,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:10,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:46:10,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:46:10,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:10,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:11,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36409180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:11,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:11,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:11,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817384436] [2021-08-21 12:46:11,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:11,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:11,015 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:12,002 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-08-21 12:46:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:46:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:12,004 INFO L225 Difference]: With dead ends: 241 [2021-08-21 12:46:12,004 INFO L226 Difference]: Without dead ends: 220 [2021-08-21 12:46:12,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 870.6ms TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:46:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-21 12:46:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-08-21 12:46:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-08-21 12:46:12,007 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-08-21 12:46:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:12,007 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-08-21 12:46:12,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-08-21 12:46:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:12,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:12,008 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:12,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:12,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:12,213 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash 232463731, now seen corresponding path program 19 times [2021-08-21 12:46:12,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:12,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507986502] [2021-08-21 12:46:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:12,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:12,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:12,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507986502] [2021-08-21 12:46:12,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507986502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:12,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234326186] [2021-08-21 12:46:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:12,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:12,397 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:12,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:46:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:12,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234326186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:13,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:13,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:13,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053239694] [2021-08-21 12:46:13,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:13,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:13,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:13,278 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:14,689 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-08-21 12:46:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 12:46:14,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:14,691 INFO L225 Difference]: With dead ends: 342 [2021-08-21 12:46:14,691 INFO L226 Difference]: Without dead ends: 300 [2021-08-21 12:46:14,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1239.9ms TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:46:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-21 12:46:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-08-21 12:46:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-08-21 12:46:14,696 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-08-21 12:46:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:14,696 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-08-21 12:46:14,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-08-21 12:46:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:14,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:14,696 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:14,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:14,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:14,897 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1032464129, now seen corresponding path program 20 times [2021-08-21 12:46:14,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:14,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145621544] [2021-08-21 12:46:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:14,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:15,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:15,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145621544] [2021-08-21 12:46:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145621544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:15,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288178495] [2021-08-21 12:46:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:15,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:15,073 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:15,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:46:15,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:15,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:15,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:15,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288178495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:15,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:15,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:15,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211009389] [2021-08-21 12:46:15,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:15,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:15,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:15,966 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:17,152 INFO L93 Difference]: Finished difference Result 335 states and 651 transitions. [2021-08-21 12:46:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:46:17,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:17,153 INFO L225 Difference]: With dead ends: 335 [2021-08-21 12:46:17,153 INFO L226 Difference]: Without dead ends: 315 [2021-08-21 12:46:17,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1027.7ms TimeCoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:46:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-21 12:46:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 154. [2021-08-21 12:46:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.261437908496732) internal successors, (346), 153 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 346 transitions. [2021-08-21 12:46:17,158 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 346 transitions. Word has length 23 [2021-08-21 12:46:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:17,158 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 346 transitions. [2021-08-21 12:46:17,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 346 transitions. [2021-08-21 12:46:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:17,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:17,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:17,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:17,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 12:46:17,373 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash 103721143, now seen corresponding path program 21 times [2021-08-21 12:46:17,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:17,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714576392] [2021-08-21 12:46:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:17,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:17,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:17,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714576392] [2021-08-21 12:46:17,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714576392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:17,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306071045] [2021-08-21 12:46:17,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:17,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:17,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:17,538 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:17,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:46:18,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:46:18,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:18,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:18,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:18,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306071045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:18,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:18,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:18,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755642810] [2021-08-21 12:46:18,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:18,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:18,469 INFO L87 Difference]: Start difference. First operand 154 states and 346 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:19,648 INFO L93 Difference]: Finished difference Result 324 states and 640 transitions. [2021-08-21 12:46:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:46:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:19,649 INFO L225 Difference]: With dead ends: 324 [2021-08-21 12:46:19,649 INFO L226 Difference]: Without dead ends: 307 [2021-08-21 12:46:19,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1116.6ms TimeCoverageRelationStatistics Valid=560, Invalid=2746, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:46:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-21 12:46:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 149. [2021-08-21 12:46:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2635135135135136) internal successors, (335), 148 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2021-08-21 12:46:19,653 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 23 [2021-08-21 12:46:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:19,653 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2021-08-21 12:46:19,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2021-08-21 12:46:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:19,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:19,654 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:19,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 12:46:19,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:46:19,865 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1847881701, now seen corresponding path program 22 times [2021-08-21 12:46:19,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:19,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111408728] [2021-08-21 12:46:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:19,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:20,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:20,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111408728] [2021-08-21 12:46:20,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111408728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:20,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117575256] [2021-08-21 12:46:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:20,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:20,043 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:20,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:46:20,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:20,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:20,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:21,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117575256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:21,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:21,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:21,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607646740] [2021-08-21 12:46:21,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:21,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:21,014 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:22,013 INFO L93 Difference]: Finished difference Result 335 states and 686 transitions. [2021-08-21 12:46:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:46:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:22,015 INFO L225 Difference]: With dead ends: 335 [2021-08-21 12:46:22,015 INFO L226 Difference]: Without dead ends: 321 [2021-08-21 12:46:22,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 947.0ms TimeCoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:46:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-21 12:46:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-08-21 12:46:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2914285714285714) internal successors, (401), 175 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 401 transitions. [2021-08-21 12:46:22,019 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 401 transitions. Word has length 23 [2021-08-21 12:46:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:22,019 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 401 transitions. [2021-08-21 12:46:22,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 401 transitions. [2021-08-21 12:46:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:46:22,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:22,020 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:22,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 12:46:22,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:22,232 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:22,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1752075113, now seen corresponding path program 23 times [2021-08-21 12:46:22,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:22,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436019345] [2021-08-21 12:46:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:22,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:22,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:22,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436019345] [2021-08-21 12:46:22,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436019345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:22,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539338817] [2021-08-21 12:46:22,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:22,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:22,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:22,401 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:22,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:46:23,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:46:23,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:23,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:46:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:23,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539338817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:23,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:23,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 12:46:23,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075760234] [2021-08-21 12:46:23,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:46:23,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:46:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:46:23,422 INFO L87 Difference]: Start difference. First operand 176 states and 401 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:24,419 INFO L93 Difference]: Finished difference Result 418 states and 882 transitions. [2021-08-21 12:46:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:46:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-08-21 12:46:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:24,421 INFO L225 Difference]: With dead ends: 418 [2021-08-21 12:46:24,421 INFO L226 Difference]: Without dead ends: 404 [2021-08-21 12:46:24,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 944.1ms TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:46:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-21 12:46:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 193. [2021-08-21 12:46:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3541666666666665) internal successors, (452), 192 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 452 transitions. [2021-08-21 12:46:24,426 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 452 transitions. Word has length 23 [2021-08-21 12:46:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:24,426 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 452 transitions. [2021-08-21 12:46:24,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 12:46:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 452 transitions. [2021-08-21 12:46:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:24,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:24,426 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:24,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:24,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:24,641 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1683696561, now seen corresponding path program 24 times [2021-08-21 12:46:24,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:24,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212858318] [2021-08-21 12:46:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:24,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:24,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:24,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212858318] [2021-08-21 12:46:24,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212858318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:24,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115325222] [2021-08-21 12:46:24,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:24,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:24,784 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:46:25,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:46:25,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:25,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:25,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:25,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115325222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:25,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:25,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:46:25,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897252704] [2021-08-21 12:46:25,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:46:25,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:25,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:46:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:46:25,866 INFO L87 Difference]: Start difference. First operand 193 states and 452 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-08-21 12:46:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:26,654 INFO L93 Difference]: Finished difference Result 441 states and 930 transitions. [2021-08-21 12:46:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:46:26,655 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 25 [2021-08-21 12:46:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:26,656 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:46:26,656 INFO L226 Difference]: Without dead ends: 420 [2021-08-21 12:46:26,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:46:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-21 12:46:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 228. [2021-08-21 12:46:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-08-21 12:46:26,662 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-08-21 12:46:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:26,662 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-08-21 12:46:26,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-08-21 12:46:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-08-21 12:46:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:26,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:26,662 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:26,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:26,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:46:26,869 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1961201765, now seen corresponding path program 25 times [2021-08-21 12:46:26,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:26,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901113622] [2021-08-21 12:46:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:26,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:27,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:27,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901113622] [2021-08-21 12:46:27,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901113622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:27,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990255620] [2021-08-21 12:46:27,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:27,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:27,031 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:27,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:46:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:27,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:28,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990255620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:28,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:28,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:46:28,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944079230] [2021-08-21 12:46:28,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:46:28,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:46:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:46:28,151 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-08-21 12:46:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:29,070 INFO L93 Difference]: Finished difference Result 450 states and 937 transitions. [2021-08-21 12:46:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:46:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 25 [2021-08-21 12:46:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:29,072 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:46:29,072 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 12:46:29,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 872.1ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:46:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 12:46:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 228. [2021-08-21 12:46:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-08-21 12:46:29,077 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-08-21 12:46:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:29,077 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-08-21 12:46:29,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-08-21 12:46:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-08-21 12:46:29,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:29,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:29,078 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:29,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:29,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:46:29,293 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash 272905729, now seen corresponding path program 26 times [2021-08-21 12:46:29,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:29,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903573384] [2021-08-21 12:46:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:29,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:29,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:29,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903573384] [2021-08-21 12:46:29,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903573384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:29,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269962655] [2021-08-21 12:46:29,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:29,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:29,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:29,441 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:29,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:46:30,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:30,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:30,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:30,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269962655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:30,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:30,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 12:46:30,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053633962] [2021-08-21 12:46:30,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:46:30,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:30,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:46:30,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:46:30,592 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-08-21 12:46:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:31,272 INFO L93 Difference]: Finished difference Result 320 states and 692 transitions. [2021-08-21 12:46:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:46:31,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 25 [2021-08-21 12:46:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:31,274 INFO L225 Difference]: With dead ends: 320 [2021-08-21 12:46:31,274 INFO L226 Difference]: Without dead ends: 299 [2021-08-21 12:46:31,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 659.5ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 12:46:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-21 12:46:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 230. [2021-08-21 12:46:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.4017467248908297) internal successors, (550), 229 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 550 transitions. [2021-08-21 12:46:31,278 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 550 transitions. Word has length 25 [2021-08-21 12:46:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:31,278 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 550 transitions. [2021-08-21 12:46:31,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-08-21 12:46:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 550 transitions. [2021-08-21 12:46:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:31,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:31,279 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:31,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:31,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:46:31,501 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:31,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1916260253, now seen corresponding path program 27 times [2021-08-21 12:46:31,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:31,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280727959] [2021-08-21 12:46:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:31,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:31,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:31,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280727959] [2021-08-21 12:46:31,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280727959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:31,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749571718] [2021-08-21 12:46:31,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:31,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:31,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:31,641 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:31,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:46:32,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:46:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:32,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:32,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749571718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:32,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:32,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:32,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607402586] [2021-08-21 12:46:32,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:32,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:32,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:32,797 INFO L87 Difference]: Start difference. First operand 230 states and 550 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:33,989 INFO L93 Difference]: Finished difference Result 676 states and 1412 transitions. [2021-08-21 12:46:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:46:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:33,991 INFO L225 Difference]: With dead ends: 676 [2021-08-21 12:46:33,991 INFO L226 Difference]: Without dead ends: 635 [2021-08-21 12:46:33,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 934.2ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:46:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-21 12:46:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 344. [2021-08-21 12:46:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.498542274052478) internal successors, (857), 343 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 857 transitions. [2021-08-21 12:46:33,998 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 857 transitions. Word has length 25 [2021-08-21 12:46:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:33,998 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 857 transitions. [2021-08-21 12:46:33,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 857 transitions. [2021-08-21 12:46:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:33,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:33,999 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:34,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:34,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:46:34,214 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1266191283, now seen corresponding path program 28 times [2021-08-21 12:46:34,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:34,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113573777] [2021-08-21 12:46:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:34,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:34,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113573777] [2021-08-21 12:46:34,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113573777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931212982] [2021-08-21 12:46:34,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:34,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:34,357 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:34,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:46:35,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:35,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:35,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931212982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:35,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:35,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:35,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194405813] [2021-08-21 12:46:35,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:35,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:35,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:35,572 INFO L87 Difference]: Start difference. First operand 344 states and 857 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:36,766 INFO L93 Difference]: Finished difference Result 642 states and 1345 transitions. [2021-08-21 12:46:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:46:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:36,768 INFO L225 Difference]: With dead ends: 642 [2021-08-21 12:46:36,769 INFO L226 Difference]: Without dead ends: 607 [2021-08-21 12:46:36,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1016.2ms TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:46:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-08-21 12:46:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 305. [2021-08-21 12:46:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4309210526315788) internal successors, (739), 304 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 739 transitions. [2021-08-21 12:46:36,775 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 739 transitions. Word has length 25 [2021-08-21 12:46:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:36,775 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 739 transitions. [2021-08-21 12:46:36,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 739 transitions. [2021-08-21 12:46:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:36,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:36,776 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:36,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 12:46:36,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:36,985 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 967916211, now seen corresponding path program 29 times [2021-08-21 12:46:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:36,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58877680] [2021-08-21 12:46:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:36,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:37,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58877680] [2021-08-21 12:46:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58877680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934580291] [2021-08-21 12:46:37,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:37,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:37,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:37,114 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:37,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:46:37,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:46:37,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:37,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:46:37,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:38,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934580291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:38,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:38,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:38,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922735536] [2021-08-21 12:46:38,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:38,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:38,426 INFO L87 Difference]: Start difference. First operand 305 states and 739 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:39,214 INFO L93 Difference]: Finished difference Result 433 states and 956 transitions. [2021-08-21 12:46:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:46:39,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:39,216 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:46:39,216 INFO L226 Difference]: Without dead ends: 412 [2021-08-21 12:46:39,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=334, Invalid=2422, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:46:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-21 12:46:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-08-21 12:46:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.4372881355932203) internal successors, (719), 295 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 719 transitions. [2021-08-21 12:46:39,221 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 719 transitions. Word has length 25 [2021-08-21 12:46:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:39,221 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 719 transitions. [2021-08-21 12:46:39,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 719 transitions. [2021-08-21 12:46:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:39,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:39,222 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:39,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:39,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:39,445 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1366014511, now seen corresponding path program 30 times [2021-08-21 12:46:39,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:39,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73697274] [2021-08-21 12:46:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:39,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:39,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:39,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73697274] [2021-08-21 12:46:39,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73697274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:39,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757347076] [2021-08-21 12:46:39,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:39,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:39,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:39,621 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:46:39,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:46:40,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:46:40,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:40,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:40,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757347076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:40,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:40,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:40,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808078629] [2021-08-21 12:46:40,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:40,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:40,878 INFO L87 Difference]: Start difference. First operand 296 states and 719 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:42,258 INFO L93 Difference]: Finished difference Result 836 states and 1776 transitions. [2021-08-21 12:46:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:46:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:42,261 INFO L225 Difference]: With dead ends: 836 [2021-08-21 12:46:42,261 INFO L226 Difference]: Without dead ends: 792 [2021-08-21 12:46:42,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1225.5ms TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 12:46:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-08-21 12:46:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 410. [2021-08-21 12:46:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.5623471882640585) internal successors, (1048), 409 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1048 transitions. [2021-08-21 12:46:42,269 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1048 transitions. Word has length 25 [2021-08-21 12:46:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:42,269 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1048 transitions. [2021-08-21 12:46:42,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1048 transitions. [2021-08-21 12:46:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:42,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:42,270 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:42,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:42,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 12:46:42,481 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2016083481, now seen corresponding path program 31 times [2021-08-21 12:46:42,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:42,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154345074] [2021-08-21 12:46:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:42,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:42,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:42,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154345074] [2021-08-21 12:46:42,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154345074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:42,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393277745] [2021-08-21 12:46:42,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:42,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:42,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:42,629 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) [2021-08-21 12:46:42,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:46:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:43,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:43,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393277745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:43,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:43,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:43,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566898584] [2021-08-21 12:46:43,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:43,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:43,899 INFO L87 Difference]: Start difference. First operand 410 states and 1048 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:45,434 INFO L93 Difference]: Finished difference Result 801 states and 1700 transitions. [2021-08-21 12:46:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 12:46:45,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:45,436 INFO L225 Difference]: With dead ends: 801 [2021-08-21 12:46:45,437 INFO L226 Difference]: Without dead ends: 766 [2021-08-21 12:46:45,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1290.7ms TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 12:46:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-21 12:46:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 300. [2021-08-21 12:46:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.5050167224080266) internal successors, (749), 299 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 749 transitions. [2021-08-21 12:46:45,443 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 749 transitions. Word has length 25 [2021-08-21 12:46:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:45,443 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 749 transitions. [2021-08-21 12:46:45,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 749 transitions. [2021-08-21 12:46:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:45,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:45,444 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:45,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 12:46:45,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:45,653 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash -44776321, now seen corresponding path program 32 times [2021-08-21 12:46:45,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:45,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232383571] [2021-08-21 12:46:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:45,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:45,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:45,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232383571] [2021-08-21 12:46:45,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232383571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:45,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952252357] [2021-08-21 12:46:45,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:46:45,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:45,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:45,777 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) [2021-08-21 12:46:45,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:46:46,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:46:46,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:46,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:47,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952252357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:47,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:47,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:47,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001307137] [2021-08-21 12:46:47,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:47,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:47,088 INFO L87 Difference]: Start difference. First operand 300 states and 749 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:48,073 INFO L93 Difference]: Finished difference Result 499 states and 1080 transitions. [2021-08-21 12:46:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 12:46:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:48,075 INFO L225 Difference]: With dead ends: 499 [2021-08-21 12:46:48,075 INFO L226 Difference]: Without dead ends: 478 [2021-08-21 12:46:48,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 881.4ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:46:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-08-21 12:46:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2021-08-21 12:46:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.5187713310580206) internal successors, (738), 293 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 738 transitions. [2021-08-21 12:46:48,080 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 738 transitions. Word has length 25 [2021-08-21 12:46:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:48,080 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 738 transitions. [2021-08-21 12:46:48,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 738 transitions. [2021-08-21 12:46:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:48,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:48,081 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:48,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:48,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:48,300 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -580006123, now seen corresponding path program 33 times [2021-08-21 12:46:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:48,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041240861] [2021-08-21 12:46:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:48,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:48,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:48,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041240861] [2021-08-21 12:46:48,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041240861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:48,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329651161] [2021-08-21 12:46:48,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:46:48,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:48,449 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) [2021-08-21 12:46:48,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:46:49,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:46:49,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:49,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:49,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:49,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329651161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:49,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:49,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:49,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145865950] [2021-08-21 12:46:49,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:49,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:49,864 INFO L87 Difference]: Start difference. First operand 294 states and 738 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:50,561 INFO L93 Difference]: Finished difference Result 435 states and 957 transitions. [2021-08-21 12:46:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:46:50,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:50,563 INFO L225 Difference]: With dead ends: 435 [2021-08-21 12:46:50,563 INFO L226 Difference]: Without dead ends: 382 [2021-08-21 12:46:50,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 12:46:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-21 12:46:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 286. [2021-08-21 12:46:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.389473684210526) internal successors, (681), 285 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 681 transitions. [2021-08-21 12:46:50,568 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 681 transitions. Word has length 25 [2021-08-21 12:46:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:50,568 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 681 transitions. [2021-08-21 12:46:50,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 681 transitions. [2021-08-21 12:46:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:50,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:50,569 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:50,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:50,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 12:46:50,788 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash -566537999, now seen corresponding path program 34 times [2021-08-21 12:46:50,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:50,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976673257] [2021-08-21 12:46:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:50,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:50,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:50,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976673257] [2021-08-21 12:46:50,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976673257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:50,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331031528] [2021-08-21 12:46:50,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:46:50,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:50,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:50,932 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) [2021-08-21 12:46:50,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:46:51,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:46:51,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:51,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:51,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:52,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331031528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:52,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:52,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:52,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754090314] [2021-08-21 12:46:52,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:52,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:52,288 INFO L87 Difference]: Start difference. First operand 286 states and 681 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:53,204 INFO L93 Difference]: Finished difference Result 526 states and 1119 transitions. [2021-08-21 12:46:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:46:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:53,206 INFO L225 Difference]: With dead ends: 526 [2021-08-21 12:46:53,206 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 12:46:53,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 809.7ms TimeCoverageRelationStatistics Valid=403, Invalid=2789, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:46:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 12:46:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-08-21 12:46:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.3015384615384615) internal successors, (748), 325 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 748 transitions. [2021-08-21 12:46:53,214 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 748 transitions. Word has length 25 [2021-08-21 12:46:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:53,214 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 748 transitions. [2021-08-21 12:46:53,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 748 transitions. [2021-08-21 12:46:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:53,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:53,215 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:53,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:53,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:46:53,427 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 83530971, now seen corresponding path program 35 times [2021-08-21 12:46:53,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:53,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855604504] [2021-08-21 12:46:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:53,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:53,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:53,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855604504] [2021-08-21 12:46:53,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855604504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:53,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412132646] [2021-08-21 12:46:53,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:46:53,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:53,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:53,593 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) [2021-08-21 12:46:53,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:46:54,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:46:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:54,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:55,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412132646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:55,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:55,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:55,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343227489] [2021-08-21 12:46:55,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:55,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:55,032 INFO L87 Difference]: Start difference. First operand 326 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:55,909 INFO L93 Difference]: Finished difference Result 471 states and 986 transitions. [2021-08-21 12:46:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:46:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:55,911 INFO L225 Difference]: With dead ends: 471 [2021-08-21 12:46:55,911 INFO L226 Difference]: Without dead ends: 441 [2021-08-21 12:46:55,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 818.4ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:46:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-21 12:46:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 285. [2021-08-21 12:46:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.3204225352112675) internal successors, (659), 284 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 659 transitions. [2021-08-21 12:46:55,915 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 659 transitions. Word has length 25 [2021-08-21 12:46:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:55,916 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 659 transitions. [2021-08-21 12:46:55,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 659 transitions. [2021-08-21 12:46:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:55,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:55,916 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:55,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:56,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:46:56,125 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1977328831, now seen corresponding path program 36 times [2021-08-21 12:46:56,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:56,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508820749] [2021-08-21 12:46:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:56,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:56,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:56,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508820749] [2021-08-21 12:46:56,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508820749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:56,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229706531] [2021-08-21 12:46:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:46:56,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:56,268 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) [2021-08-21 12:46:56,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:46:57,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:46:57,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:46:57,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:46:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:57,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229706531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:57,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:46:57,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:46:57,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995137967] [2021-08-21 12:46:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:46:57,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:46:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:46:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:46:57,711 INFO L87 Difference]: Start difference. First operand 285 states and 659 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:46:58,288 INFO L93 Difference]: Finished difference Result 371 states and 801 transitions. [2021-08-21 12:46:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:46:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:46:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:46:58,290 INFO L225 Difference]: With dead ends: 371 [2021-08-21 12:46:58,290 INFO L226 Difference]: Without dead ends: 357 [2021-08-21 12:46:58,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 594.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:46:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-21 12:46:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 289. [2021-08-21 12:46:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3194444444444446) internal successors, (668), 288 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:46:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 668 transitions. [2021-08-21 12:46:58,294 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 668 transitions. Word has length 25 [2021-08-21 12:46:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:46:58,294 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 668 transitions. [2021-08-21 12:46:58,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:46:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 668 transitions. [2021-08-21 12:46:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:46:58,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:46:58,294 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:46:58,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:46:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:58,509 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:46:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:46:58,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1304945933, now seen corresponding path program 37 times [2021-08-21 12:46:58,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:46:58,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546586779] [2021-08-21 12:46:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:46:58,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:46:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:46:58,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:46:58,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546586779] [2021-08-21 12:46:58,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546586779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:46:58,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715452947] [2021-08-21 12:46:58,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:46:58,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:46:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:46:58,646 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) [2021-08-21 12:46:58,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:46:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:46:59,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:46:59,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:00,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715452947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:00,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:00,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:47:00,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712347943] [2021-08-21 12:47:00,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:00,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:00,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:00,108 INFO L87 Difference]: Start difference. First operand 289 states and 668 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:47:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:00,927 INFO L93 Difference]: Finished difference Result 434 states and 912 transitions. [2021-08-21 12:47:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:47:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:47:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:00,929 INFO L225 Difference]: With dead ends: 434 [2021-08-21 12:47:00,929 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 12:47:00,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 766.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 12:47:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 12:47:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 289. [2021-08-21 12:47:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3229166666666665) internal successors, (669), 288 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) [2021-08-21 12:47:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 669 transitions. [2021-08-21 12:47:00,933 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 669 transitions. Word has length 25 [2021-08-21 12:47:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:00,933 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 669 transitions. [2021-08-21 12:47:00,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:47:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 669 transitions. [2021-08-21 12:47:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:47:00,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:00,934 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:00,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:01,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:47:01,144 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:01,144 INFO L82 PathProgramCache]: Analyzing trace with hash 769716131, now seen corresponding path program 38 times [2021-08-21 12:47:01,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:01,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062218215] [2021-08-21 12:47:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:01,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:01,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:01,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062218215] [2021-08-21 12:47:01,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062218215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:01,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703882891] [2021-08-21 12:47:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:01,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:01,265 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) [2021-08-21 12:47:01,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:47:02,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:02,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:47:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:02,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703882891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:02,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:02,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 12:47:02,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568797899] [2021-08-21 12:47:02,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:02,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:02,741 INFO L87 Difference]: Start difference. First operand 289 states and 669 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:47:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:03,301 INFO L93 Difference]: Finished difference Result 408 states and 870 transitions. [2021-08-21 12:47:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:47:03,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-08-21 12:47:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:03,303 INFO L225 Difference]: With dead ends: 408 [2021-08-21 12:47:03,303 INFO L226 Difference]: Without dead ends: 355 [2021-08-21 12:47:03,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 572.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:47:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-21 12:47:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 281. [2021-08-21 12:47:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.307142857142857) internal successors, (646), 280 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 646 transitions. [2021-08-21 12:47:03,307 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 646 transitions. Word has length 25 [2021-08-21 12:47:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:03,307 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 646 transitions. [2021-08-21 12:47:03,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-08-21 12:47:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 646 transitions. [2021-08-21 12:47:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:47:03,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:03,308 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:03,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:47:03,519 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash -817755013, now seen corresponding path program 39 times [2021-08-21 12:47:03,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:03,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3243296] [2021-08-21 12:47:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:03,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:03,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:03,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3243296] [2021-08-21 12:47:03,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3243296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:03,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853924385] [2021-08-21 12:47:03,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:03,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:03,786 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) [2021-08-21 12:47:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:47:04,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:47:04,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:04,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:47:04,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:05,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853924385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:05,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:05,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 12:47:05,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868209164] [2021-08-21 12:47:05,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:05,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:05,395 INFO L87 Difference]: Start difference. First operand 281 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-08-21 12:47:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:07,477 INFO L93 Difference]: Finished difference Result 487 states and 1044 transitions. [2021-08-21 12:47:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 12:47:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-08-21 12:47:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:07,479 INFO L225 Difference]: With dead ends: 487 [2021-08-21 12:47:07,479 INFO L226 Difference]: Without dead ends: 473 [2021-08-21 12:47:07,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1942.6ms TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:47:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-08-21 12:47:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 299. [2021-08-21 12:47:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.291946308724832) internal successors, (683), 298 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 683 transitions. [2021-08-21 12:47:07,484 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 683 transitions. Word has length 25 [2021-08-21 12:47:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:07,484 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 683 transitions. [2021-08-21 12:47:07,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-08-21 12:47:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 683 transitions. [2021-08-21 12:47:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:47:07,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:07,485 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:07,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:07,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:07,705 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:07,705 INFO L82 PathProgramCache]: Analyzing trace with hash 318430259, now seen corresponding path program 40 times [2021-08-21 12:47:07,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:07,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062611854] [2021-08-21 12:47:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:07,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:07,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:07,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062611854] [2021-08-21 12:47:07,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062611854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:07,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704122372] [2021-08-21 12:47:07,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:07,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:07,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:07,925 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) [2021-08-21 12:47:07,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:47:09,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:09,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:09,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 12:47:09,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704122372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:09,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:09,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 12:47:09,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045888870] [2021-08-21 12:47:09,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:47:09,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:47:09,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:47:09,601 INFO L87 Difference]: Start difference. First operand 299 states and 683 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-08-21 12:47:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:11,870 INFO L93 Difference]: Finished difference Result 516 states and 1115 transitions. [2021-08-21 12:47:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:47:11,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-08-21 12:47:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:11,872 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:47:11,872 INFO L226 Difference]: Without dead ends: 502 [2021-08-21 12:47:11,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2100.9ms TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:47:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-21 12:47:11,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 301. [2021-08-21 12:47:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3) internal successors, (690), 300 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 690 transitions. [2021-08-21 12:47:11,877 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 690 transitions. Word has length 25 [2021-08-21 12:47:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:11,877 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 690 transitions. [2021-08-21 12:47:11,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-08-21 12:47:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 690 transitions. [2021-08-21 12:47:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:11,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:11,878 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:11,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 12:47:12,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 12:47:12,078 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1444914083, now seen corresponding path program 41 times [2021-08-21 12:47:12,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:12,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138752303] [2021-08-21 12:47:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:12,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:12,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:12,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138752303] [2021-08-21 12:47:12,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138752303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:12,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387540167] [2021-08-21 12:47:12,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:12,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:12,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:12,268 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) [2021-08-21 12:47:12,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:47:13,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:47:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:13,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:13,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387540167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:13,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:13,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:13,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606681943] [2021-08-21 12:47:13,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:13,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:13,915 INFO L87 Difference]: Start difference. First operand 301 states and 690 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:14,887 INFO L93 Difference]: Finished difference Result 558 states and 1181 transitions. [2021-08-21 12:47:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 12:47:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:14,889 INFO L225 Difference]: With dead ends: 558 [2021-08-21 12:47:14,889 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:47:14,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1010.4ms TimeCoverageRelationStatistics Valid=552, Invalid=3608, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 12:47:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:47:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 367. [2021-08-21 12:47:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.3524590163934427) internal successors, (861), 366 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 861 transitions. [2021-08-21 12:47:14,895 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 861 transitions. Word has length 27 [2021-08-21 12:47:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:14,895 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 861 transitions. [2021-08-21 12:47:14,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 861 transitions. [2021-08-21 12:47:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:14,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:14,896 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:14,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 12:47:15,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:15,115 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 905118949, now seen corresponding path program 42 times [2021-08-21 12:47:15,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:15,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129620103] [2021-08-21 12:47:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:15,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:15,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:15,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129620103] [2021-08-21 12:47:15,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129620103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:15,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111675984] [2021-08-21 12:47:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:15,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:15,309 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) [2021-08-21 12:47:15,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:47:16,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:47:16,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:16,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:16,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111675984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:16,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:16,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:16,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217558042] [2021-08-21 12:47:16,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:16,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:16,972 INFO L87 Difference]: Start difference. First operand 367 states and 861 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:18,126 INFO L93 Difference]: Finished difference Result 582 states and 1226 transitions. [2021-08-21 12:47:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:47:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:18,128 INFO L225 Difference]: With dead ends: 582 [2021-08-21 12:47:18,128 INFO L226 Difference]: Without dead ends: 544 [2021-08-21 12:47:18,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1113.4ms TimeCoverageRelationStatistics Valid=636, Invalid=4194, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:47:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-21 12:47:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 370. [2021-08-21 12:47:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.3495934959349594) internal successors, (867), 369 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 867 transitions. [2021-08-21 12:47:18,135 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 867 transitions. Word has length 27 [2021-08-21 12:47:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:18,135 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 867 transitions. [2021-08-21 12:47:18,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 867 transitions. [2021-08-21 12:47:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:18,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:18,136 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:18,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:18,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:18,357 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1737543465, now seen corresponding path program 43 times [2021-08-21 12:47:18,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:18,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622209430] [2021-08-21 12:47:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:18,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:18,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:18,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622209430] [2021-08-21 12:47:18,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622209430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:18,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988370502] [2021-08-21 12:47:18,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:18,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:18,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:18,552 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) [2021-08-21 12:47:18,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:47:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:19,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:20,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988370502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:20,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:20,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:20,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163245862] [2021-08-21 12:47:20,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:20,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:20,262 INFO L87 Difference]: Start difference. First operand 370 states and 867 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:21,676 INFO L93 Difference]: Finished difference Result 675 states and 1384 transitions. [2021-08-21 12:47:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:47:21,676 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:21,678 INFO L225 Difference]: With dead ends: 675 [2021-08-21 12:47:21,678 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 12:47:21,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1239.2ms TimeCoverageRelationStatistics Valid=733, Invalid=4817, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 12:47:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 12:47:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 376. [2021-08-21 12:47:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.3573333333333335) internal successors, (884), 375 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 884 transitions. [2021-08-21 12:47:21,684 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 884 transitions. Word has length 27 [2021-08-21 12:47:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:21,684 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 884 transitions. [2021-08-21 12:47:21,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 884 transitions. [2021-08-21 12:47:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:21,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:21,685 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:21,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:21,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 12:47:21,890 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash 472615605, now seen corresponding path program 44 times [2021-08-21 12:47:21,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:21,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997946436] [2021-08-21 12:47:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:21,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:22,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:22,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997946436] [2021-08-21 12:47:22,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997946436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:22,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922226326] [2021-08-21 12:47:22,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:22,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:22,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:22,092 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) [2021-08-21 12:47:22,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:47:23,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:23,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:23,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922226326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:23,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:23,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:23,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944702127] [2021-08-21 12:47:23,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:23,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:23,829 INFO L87 Difference]: Start difference. First operand 376 states and 884 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:25,068 INFO L93 Difference]: Finished difference Result 630 states and 1297 transitions. [2021-08-21 12:47:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:47:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:25,070 INFO L225 Difference]: With dead ends: 630 [2021-08-21 12:47:25,070 INFO L226 Difference]: Without dead ends: 603 [2021-08-21 12:47:25,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1111.2ms TimeCoverageRelationStatistics Valid=682, Invalid=4148, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 12:47:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-08-21 12:47:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 379. [2021-08-21 12:47:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.357142857142857) internal successors, (891), 378 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 891 transitions. [2021-08-21 12:47:25,076 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 891 transitions. Word has length 27 [2021-08-21 12:47:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:25,076 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 891 transitions. [2021-08-21 12:47:25,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 891 transitions. [2021-08-21 12:47:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:25,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:25,077 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:25,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:25,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:47:25,278 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:25,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1608800877, now seen corresponding path program 45 times [2021-08-21 12:47:25,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:25,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676944018] [2021-08-21 12:47:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:25,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:25,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:25,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676944018] [2021-08-21 12:47:25,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676944018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:25,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866413568] [2021-08-21 12:47:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:25,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:25,494 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) [2021-08-21 12:47:25,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:47:26,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:47:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:26,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:27,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866413568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:27,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:27,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:27,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648561960] [2021-08-21 12:47:27,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:27,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:27,257 INFO L87 Difference]: Start difference. First operand 379 states and 891 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:28,637 INFO L93 Difference]: Finished difference Result 653 states and 1339 transitions. [2021-08-21 12:47:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 12:47:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:28,639 INFO L225 Difference]: With dead ends: 653 [2021-08-21 12:47:28,639 INFO L226 Difference]: Without dead ends: 629 [2021-08-21 12:47:28,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 1273.0ms TimeCoverageRelationStatistics Valid=768, Invalid=4344, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 12:47:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-21 12:47:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 378. [2021-08-21 12:47:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.3580901856763927) internal successors, (889), 377 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 889 transitions. [2021-08-21 12:47:28,644 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 889 transitions. Word has length 27 [2021-08-21 12:47:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:28,645 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 889 transitions. [2021-08-21 12:47:28,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 889 transitions. [2021-08-21 12:47:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:28,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:28,645 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:28,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 12:47:28,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:47:28,846 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2036097449, now seen corresponding path program 46 times [2021-08-21 12:47:28,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:28,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965949106] [2021-08-21 12:47:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:28,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:29,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:29,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965949106] [2021-08-21 12:47:29,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965949106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:29,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563166012] [2021-08-21 12:47:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:29,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:29,079 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) [2021-08-21 12:47:29,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:47:30,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:30,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:30,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:30,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:30,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563166012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:30,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:30,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:30,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034875294] [2021-08-21 12:47:30,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:30,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:30,891 INFO L87 Difference]: Start difference. First operand 378 states and 889 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:32,430 INFO L93 Difference]: Finished difference Result 682 states and 1444 transitions. [2021-08-21 12:47:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:47:32,430 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:32,432 INFO L225 Difference]: With dead ends: 682 [2021-08-21 12:47:32,432 INFO L226 Difference]: Without dead ends: 659 [2021-08-21 12:47:32,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1416.7ms TimeCoverageRelationStatistics Valid=878, Invalid=4822, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 12:47:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-08-21 12:47:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 400. [2021-08-21 12:47:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.3508771929824563) internal successors, (938), 399 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 938 transitions. [2021-08-21 12:47:32,439 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 938 transitions. Word has length 27 [2021-08-21 12:47:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:32,439 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 938 transitions. [2021-08-21 12:47:32,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 938 transitions. [2021-08-21 12:47:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:32,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:32,440 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:32,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 12:47:32,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:32,646 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:32,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2093499857, now seen corresponding path program 47 times [2021-08-21 12:47:32,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:32,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927285737] [2021-08-21 12:47:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:32,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:32,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:32,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927285737] [2021-08-21 12:47:32,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927285737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:32,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715534958] [2021-08-21 12:47:32,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:32,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:32,849 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) [2021-08-21 12:47:32,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:47:34,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:47:34,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:34,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:34,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:34,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715534958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:34,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:34,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:34,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333371217] [2021-08-21 12:47:34,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:34,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:34,779 INFO L87 Difference]: Start difference. First operand 400 states and 938 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:36,713 INFO L93 Difference]: Finished difference Result 765 states and 1603 transitions. [2021-08-21 12:47:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 12:47:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:36,715 INFO L225 Difference]: With dead ends: 765 [2021-08-21 12:47:36,715 INFO L226 Difference]: Without dead ends: 723 [2021-08-21 12:47:36,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1757.4ms TimeCoverageRelationStatistics Valid=939, Invalid=5867, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 12:47:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-08-21 12:47:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 453. [2021-08-21 12:47:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.3805309734513274) internal successors, (1076), 452 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1076 transitions. [2021-08-21 12:47:36,722 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1076 transitions. Word has length 27 [2021-08-21 12:47:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:36,722 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1076 transitions. [2021-08-21 12:47:36,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1076 transitions. [2021-08-21 12:47:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:36,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:36,723 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:36,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 12:47:36,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:47:36,937 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash 936539579, now seen corresponding path program 48 times [2021-08-21 12:47:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:36,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370589557] [2021-08-21 12:47:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:36,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:37,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:37,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370589557] [2021-08-21 12:47:37,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370589557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:37,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031837792] [2021-08-21 12:47:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:37,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:37,161 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) [2021-08-21 12:47:37,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:47:38,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:47:38,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:38,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:47:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:39,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031837792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:39,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:39,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:39,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629216098] [2021-08-21 12:47:39,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:39,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:39,114 INFO L87 Difference]: Start difference. First operand 453 states and 1076 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:40,832 INFO L93 Difference]: Finished difference Result 743 states and 1563 transitions. [2021-08-21 12:47:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:47:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:40,834 INFO L225 Difference]: With dead ends: 743 [2021-08-21 12:47:40,834 INFO L226 Difference]: Without dead ends: 706 [2021-08-21 12:47:40,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1591.4ms TimeCoverageRelationStatistics Valid=839, Invalid=4861, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 12:47:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-08-21 12:47:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 458. [2021-08-21 12:47:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.352297592997812) internal successors, (1075), 457 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1075 transitions. [2021-08-21 12:47:40,841 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1075 transitions. Word has length 27 [2021-08-21 12:47:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:40,841 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1075 transitions. [2021-08-21 12:47:40,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1075 transitions. [2021-08-21 12:47:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:40,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:40,842 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:40,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 12:47:41,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:47:41,049 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:41,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1905613937, now seen corresponding path program 49 times [2021-08-21 12:47:41,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:41,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037716298] [2021-08-21 12:47:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:41,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:41,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:41,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037716298] [2021-08-21 12:47:41,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037716298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:41,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292170855] [2021-08-21 12:47:41,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:47:41,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:41,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:41,250 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) [2021-08-21 12:47:41,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:47:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:42,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:43,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292170855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:43,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:43,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:47:43,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778689399] [2021-08-21 12:47:43,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:47:43,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:47:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:47:43,151 INFO L87 Difference]: Start difference. First operand 458 states and 1075 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:44,710 INFO L93 Difference]: Finished difference Result 876 states and 1901 transitions. [2021-08-21 12:47:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 12:47:44,711 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:44,713 INFO L225 Difference]: With dead ends: 876 [2021-08-21 12:47:44,713 INFO L226 Difference]: Without dead ends: 837 [2021-08-21 12:47:44,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1393.2ms TimeCoverageRelationStatistics Valid=803, Invalid=4309, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 12:47:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-08-21 12:47:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 545. [2021-08-21 12:47:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.3731617647058822) internal successors, (1291), 544 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1291 transitions. [2021-08-21 12:47:44,720 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1291 transitions. Word has length 27 [2021-08-21 12:47:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:44,721 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1291 transitions. [2021-08-21 12:47:44,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1291 transitions. [2021-08-21 12:47:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:44,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:44,722 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:44,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 12:47:44,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:44,929 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1940359641, now seen corresponding path program 50 times [2021-08-21 12:47:44,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:44,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379390338] [2021-08-21 12:47:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:44,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:45,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:45,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379390338] [2021-08-21 12:47:45,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379390338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:45,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563648209] [2021-08-21 12:47:45,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:47:45,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:45,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:45,077 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) [2021-08-21 12:47:45,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:47:46,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:47:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:46,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:47,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563648209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:47,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:47,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-21 12:47:47,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183457785] [2021-08-21 12:47:47,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:47:47,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:47:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:47:47,025 INFO L87 Difference]: Start difference. First operand 545 states and 1291 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:48,117 INFO L93 Difference]: Finished difference Result 754 states and 1669 transitions. [2021-08-21 12:47:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 12:47:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:48,124 INFO L225 Difference]: With dead ends: 754 [2021-08-21 12:47:48,124 INFO L226 Difference]: Without dead ends: 729 [2021-08-21 12:47:48,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1027.7ms TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 12:47:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-08-21 12:47:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 496. [2021-08-21 12:47:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 2.309090909090909) internal successors, (1143), 495 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1143 transitions. [2021-08-21 12:47:48,131 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1143 transitions. Word has length 27 [2021-08-21 12:47:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:48,131 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1143 transitions. [2021-08-21 12:47:48,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1143 transitions. [2021-08-21 12:47:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:48,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:48,132 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:48,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:48,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 12:47:48,349 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash -120500161, now seen corresponding path program 51 times [2021-08-21 12:47:48,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:48,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565369387] [2021-08-21 12:47:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:48,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:48,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:48,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565369387] [2021-08-21 12:47:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565369387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:48,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148669270] [2021-08-21 12:47:48,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:47:48,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:48,514 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) [2021-08-21 12:47:48,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:47:50,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:47:50,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:50,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:50,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148669270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:50,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:50,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-21 12:47:50,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553981830] [2021-08-21 12:47:50,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:47:50,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:50,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:47:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:47:50,567 INFO L87 Difference]: Start difference. First operand 496 states and 1143 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:51,361 INFO L93 Difference]: Finished difference Result 708 states and 1558 transitions. [2021-08-21 12:47:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:47:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:51,363 INFO L225 Difference]: With dead ends: 708 [2021-08-21 12:47:51,363 INFO L226 Difference]: Without dead ends: 694 [2021-08-21 12:47:51,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 765.2ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 12:47:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-21 12:47:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 572. [2021-08-21 12:47:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3047285464098075) internal successors, (1316), 571 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1316 transitions. [2021-08-21 12:47:51,371 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1316 transitions. Word has length 27 [2021-08-21 12:47:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:51,371 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1316 transitions. [2021-08-21 12:47:51,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1316 transitions. [2021-08-21 12:47:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:51,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:51,372 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:51,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 12:47:51,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:51,577 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1133192693, now seen corresponding path program 52 times [2021-08-21 12:47:51,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:51,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053275997] [2021-08-21 12:47:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:51,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:51,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:51,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053275997] [2021-08-21 12:47:51,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053275997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:51,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825924766] [2021-08-21 12:47:51,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:47:51,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:51,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:51,731 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) [2021-08-21 12:47:51,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:47:53,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:47:53,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:53,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:53,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825924766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:53,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:53,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-21 12:47:53,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129306493] [2021-08-21 12:47:53,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:47:53,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:47:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:47:53,760 INFO L87 Difference]: Start difference. First operand 572 states and 1316 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:54,637 INFO L93 Difference]: Finished difference Result 745 states and 1625 transitions. [2021-08-21 12:47:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 12:47:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:54,639 INFO L225 Difference]: With dead ends: 745 [2021-08-21 12:47:54,639 INFO L226 Difference]: Without dead ends: 710 [2021-08-21 12:47:54,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 856.2ms TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 12:47:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-08-21 12:47:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 504. [2021-08-21 12:47:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.2922465208747513) internal successors, (1153), 503 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1153 transitions. [2021-08-21 12:47:54,646 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1153 transitions. Word has length 27 [2021-08-21 12:47:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:54,646 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1153 transitions. [2021-08-21 12:47:54,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1153 transitions. [2021-08-21 12:47:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:54,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:54,647 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:54,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:47:54,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 12:47:54,847 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1668422495, now seen corresponding path program 53 times [2021-08-21 12:47:54,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:54,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284133122] [2021-08-21 12:47:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:54,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:55,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:55,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284133122] [2021-08-21 12:47:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284133122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:55,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043182134] [2021-08-21 12:47:55,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:47:55,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:55,004 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) [2021-08-21 12:47:55,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:47:56,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:47:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:56,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:47:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:57,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043182134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:57,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:47:57,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-21 12:47:57,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357277544] [2021-08-21 12:47:57,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:47:57,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:47:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:47:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:47:57,054 INFO L87 Difference]: Start difference. First operand 504 states and 1153 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:47:57,682 INFO L93 Difference]: Finished difference Result 609 states and 1335 transitions. [2021-08-21 12:47:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:47:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:47:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:47:57,683 INFO L225 Difference]: With dead ends: 609 [2021-08-21 12:47:57,684 INFO L226 Difference]: Without dead ends: 571 [2021-08-21 12:47:57,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:47:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-21 12:47:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 472. [2021-08-21 12:47:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.140127388535032) internal successors, (1008), 471 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1008 transitions. [2021-08-21 12:47:57,689 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1008 transitions. Word has length 27 [2021-08-21 12:47:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:47:57,689 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1008 transitions. [2021-08-21 12:47:57,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:47:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1008 transitions. [2021-08-21 12:47:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:47:57,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:47:57,690 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:47:57,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:47:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:47:57,897 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:47:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:47:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1363715007, now seen corresponding path program 54 times [2021-08-21 12:47:57,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:47:57,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444400192] [2021-08-21 12:47:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:47:57,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:47:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:47:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:47:58,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:47:58,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444400192] [2021-08-21 12:47:58,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444400192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:47:58,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862413318] [2021-08-21 12:47:58,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:47:58,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:47:58,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:47:58,108 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) [2021-08-21 12:47:58,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:47:59,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:47:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:47:59,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:47:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:00,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862413318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:00,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:00,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:48:00,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124865680] [2021-08-21 12:48:00,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:48:00,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:48:00,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:48:00,246 INFO L87 Difference]: Start difference. First operand 472 states and 1008 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:01,871 INFO L93 Difference]: Finished difference Result 757 states and 1524 transitions. [2021-08-21 12:48:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 12:48:01,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:48:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:01,873 INFO L225 Difference]: With dead ends: 757 [2021-08-21 12:48:01,873 INFO L226 Difference]: Without dead ends: 722 [2021-08-21 12:48:01,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 1481.4ms TimeCoverageRelationStatistics Valid=861, Invalid=4839, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 12:48:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-08-21 12:48:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 398. [2021-08-21 12:48:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.1309823677581865) internal successors, (846), 397 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 846 transitions. [2021-08-21 12:48:01,878 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 846 transitions. Word has length 27 [2021-08-21 12:48:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:01,878 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 846 transitions. [2021-08-21 12:48:01,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 846 transitions. [2021-08-21 12:48:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:01,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:01,879 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:01,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:02,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:02,088 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash 491649389, now seen corresponding path program 55 times [2021-08-21 12:48:02,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:02,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346285212] [2021-08-21 12:48:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:02,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:02,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:02,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346285212] [2021-08-21 12:48:02,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346285212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:02,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448535935] [2021-08-21 12:48:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:02,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:02,273 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) [2021-08-21 12:48:02,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:48:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:03,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448535935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:04,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:04,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 12:48:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184538693] [2021-08-21 12:48:04,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:48:04,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:04,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:48:04,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:48:04,509 INFO L87 Difference]: Start difference. First operand 398 states and 846 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:05,519 INFO L93 Difference]: Finished difference Result 708 states and 1435 transitions. [2021-08-21 12:48:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:48:05,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-08-21 12:48:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:05,521 INFO L225 Difference]: With dead ends: 708 [2021-08-21 12:48:05,521 INFO L226 Difference]: Without dead ends: 680 [2021-08-21 12:48:05,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1000.3ms TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 12:48:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-21 12:48:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 410. [2021-08-21 12:48:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.12958435207824) internal successors, (871), 409 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 871 transitions. [2021-08-21 12:48:05,526 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 871 transitions. Word has length 29 [2021-08-21 12:48:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:05,526 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 871 transitions. [2021-08-21 12:48:05,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 871 transitions. [2021-08-21 12:48:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:05,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:05,527 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:05,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 12:48:05,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:05,728 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:05,728 INFO L82 PathProgramCache]: Analyzing trace with hash -743920925, now seen corresponding path program 56 times [2021-08-21 12:48:05,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:05,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293336772] [2021-08-21 12:48:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:05,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:05,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:05,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293336772] [2021-08-21 12:48:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293336772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:05,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31299493] [2021-08-21 12:48:05,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:05,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:05,882 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) [2021-08-21 12:48:05,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:48:07,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:07,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:08,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31299493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:08,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:08,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-21 12:48:08,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246890357] [2021-08-21 12:48:08,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:48:08,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:48:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:48:08,060 INFO L87 Difference]: Start difference. First operand 410 states and 871 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:09,653 INFO L93 Difference]: Finished difference Result 901 states and 1807 transitions. [2021-08-21 12:48:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 12:48:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-08-21 12:48:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:09,654 INFO L225 Difference]: With dead ends: 901 [2021-08-21 12:48:09,654 INFO L226 Difference]: Without dead ends: 853 [2021-08-21 12:48:09,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 1318.0ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 12:48:09,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-08-21 12:48:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 532. [2021-08-21 12:48:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.1412429378531073) internal successors, (1137), 531 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1137 transitions. [2021-08-21 12:48:09,662 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1137 transitions. Word has length 29 [2021-08-21 12:48:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:09,662 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1137 transitions. [2021-08-21 12:48:09,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:09,662 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1137 transitions. [2021-08-21 12:48:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:09,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:09,663 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:09,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:09,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:09,863 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:09,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1756613457, now seen corresponding path program 57 times [2021-08-21 12:48:09,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:09,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15800012] [2021-08-21 12:48:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:09,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:10,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:10,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15800012] [2021-08-21 12:48:10,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15800012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:10,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684980207] [2021-08-21 12:48:10,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:10,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:10,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:10,033 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) [2021-08-21 12:48:10,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:48:11,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:48:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:11,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:12,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684980207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:12,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:12,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-21 12:48:12,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821521081] [2021-08-21 12:48:12,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:48:12,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:12,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:48:12,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:48:12,316 INFO L87 Difference]: Start difference. First operand 532 states and 1137 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:14,270 INFO L93 Difference]: Finished difference Result 1089 states and 2187 transitions. [2021-08-21 12:48:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 12:48:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-08-21 12:48:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:14,272 INFO L225 Difference]: With dead ends: 1089 [2021-08-21 12:48:14,273 INFO L226 Difference]: Without dead ends: 1038 [2021-08-21 12:48:14,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3388 ImplicationChecksByTransitivity, 1693.1ms TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-08-21 12:48:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-08-21 12:48:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 494. [2021-08-21 12:48:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.1480730223123734) internal successors, (1059), 493 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1059 transitions. [2021-08-21 12:48:14,280 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1059 transitions. Word has length 29 [2021-08-21 12:48:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:14,280 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1059 transitions. [2021-08-21 12:48:14,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1059 transitions. [2021-08-21 12:48:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:14,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:14,281 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:14,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 12:48:14,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 12:48:14,482 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1584400941, now seen corresponding path program 58 times [2021-08-21 12:48:14,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:14,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527025757] [2021-08-21 12:48:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:14,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:48:14,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527025757] [2021-08-21 12:48:14,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527025757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591739841] [2021-08-21 12:48:14,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:48:14,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:14,536 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) [2021-08-21 12:48:14,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:48:16,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:48:16,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:48:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:48:16,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591739841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:16,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:16,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:48:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637691] [2021-08-21 12:48:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:48:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:48:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:48:16,471 INFO L87 Difference]: Start difference. First operand 494 states and 1059 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:16,525 INFO L93 Difference]: Finished difference Result 652 states and 1367 transitions. [2021-08-21 12:48:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:48:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:48:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:16,526 INFO L225 Difference]: With dead ends: 652 [2021-08-21 12:48:16,526 INFO L226 Difference]: Without dead ends: 619 [2021-08-21 12:48:16,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:48:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-21 12:48:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 436. [2021-08-21 12:48:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.142528735632184) internal successors, (932), 435 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 932 transitions. [2021-08-21 12:48:16,531 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 932 transitions. Word has length 29 [2021-08-21 12:48:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:16,532 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 932 transitions. [2021-08-21 12:48:16,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 932 transitions. [2021-08-21 12:48:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:16,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:16,532 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:16,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:48:16,733 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1860415149, now seen corresponding path program 59 times [2021-08-21 12:48:16,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:16,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929232457] [2021-08-21 12:48:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:16,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:16,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:16,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929232457] [2021-08-21 12:48:16,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929232457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:16,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664648946] [2021-08-21 12:48:16,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:16,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:16,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:16,925 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) [2021-08-21 12:48:16,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:48:18,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:48:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:18,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:19,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664648946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:19,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:19,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 12:48:19,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191248396] [2021-08-21 12:48:19,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:48:19,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:48:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:48:19,254 INFO L87 Difference]: Start difference. First operand 436 states and 932 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:20,343 INFO L93 Difference]: Finished difference Result 678 states and 1358 transitions. [2021-08-21 12:48:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 12:48:20,344 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-08-21 12:48:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:20,345 INFO L225 Difference]: With dead ends: 678 [2021-08-21 12:48:20,345 INFO L226 Difference]: Without dead ends: 631 [2021-08-21 12:48:20,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 947.9ms TimeCoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 12:48:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-08-21 12:48:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 463. [2021-08-21 12:48:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.1385281385281387) internal successors, (988), 462 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 988 transitions. [2021-08-21 12:48:20,350 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 988 transitions. Word has length 29 [2021-08-21 12:48:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:20,350 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 988 transitions. [2021-08-21 12:48:20,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 988 transitions. [2021-08-21 12:48:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:20,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:20,351 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:20,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:20,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:20,553 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash 847722617, now seen corresponding path program 60 times [2021-08-21 12:48:20,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:20,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998293866] [2021-08-21 12:48:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:20,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:20,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:20,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998293866] [2021-08-21 12:48:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998293866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:20,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378746595] [2021-08-21 12:48:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:20,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:20,710 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) [2021-08-21 12:48:20,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:48:22,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:48:22,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:22,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:22,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:23,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378746595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:23,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:23,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-21 12:48:23,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242899021] [2021-08-21 12:48:23,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:48:23,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:48:23,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:48:23,007 INFO L87 Difference]: Start difference. First operand 463 states and 988 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:24,542 INFO L93 Difference]: Finished difference Result 732 states and 1451 transitions. [2021-08-21 12:48:24,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:48:24,542 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-08-21 12:48:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:24,543 INFO L225 Difference]: With dead ends: 732 [2021-08-21 12:48:24,543 INFO L226 Difference]: Without dead ends: 685 [2021-08-21 12:48:24,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 1272.8ms TimeCoverageRelationStatistics Valid=722, Invalid=5598, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 12:48:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-21 12:48:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 368. [2021-08-21 12:48:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.147138964577657) internal successors, (788), 367 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 788 transitions. [2021-08-21 12:48:24,549 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 788 transitions. Word has length 29 [2021-08-21 12:48:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:24,549 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 788 transitions. [2021-08-21 12:48:24,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 788 transitions. [2021-08-21 12:48:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:24,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:24,549 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:24,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:24,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:24,761 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2035573687, now seen corresponding path program 61 times [2021-08-21 12:48:24,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:24,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86383938] [2021-08-21 12:48:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:24,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:24,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:24,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86383938] [2021-08-21 12:48:24,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86383938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:24,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920438840] [2021-08-21 12:48:24,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:24,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:24,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:24,986 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) [2021-08-21 12:48:24,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:48:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:26,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:27,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920438840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:27,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:27,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 12:48:27,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5195033] [2021-08-21 12:48:27,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:48:27,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:48:27,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:48:27,346 INFO L87 Difference]: Start difference. First operand 368 states and 788 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:29,473 INFO L93 Difference]: Finished difference Result 688 states and 1376 transitions. [2021-08-21 12:48:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 12:48:29,473 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-08-21 12:48:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:29,474 INFO L225 Difference]: With dead ends: 688 [2021-08-21 12:48:29,474 INFO L226 Difference]: Without dead ends: 627 [2021-08-21 12:48:29,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 1969.6ms TimeCoverageRelationStatistics Valid=1021, Invalid=5621, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:48:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-08-21 12:48:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 374. [2021-08-21 12:48:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.1501340482573728) internal successors, (802), 373 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 802 transitions. [2021-08-21 12:48:29,480 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 802 transitions. Word has length 29 [2021-08-21 12:48:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:29,480 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 802 transitions. [2021-08-21 12:48:29,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 802 transitions. [2021-08-21 12:48:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:29,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:29,480 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:29,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 12:48:29,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:29,681 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash -170097305, now seen corresponding path program 62 times [2021-08-21 12:48:29,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:29,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237481659] [2021-08-21 12:48:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:29,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:30,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:30,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237481659] [2021-08-21 12:48:30,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237481659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:30,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084084616] [2021-08-21 12:48:30,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:30,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:30,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:30,101 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) [2021-08-21 12:48:30,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:48:31,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:32,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:48:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:32,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084084616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:32,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:32,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-21 12:48:32,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730222472] [2021-08-21 12:48:32,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:48:32,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:32,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:48:32,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:48:32,700 INFO L87 Difference]: Start difference. First operand 374 states and 802 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-08-21 12:48:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:33,056 INFO L93 Difference]: Finished difference Result 426 states and 896 transitions. [2021-08-21 12:48:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:48:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 29 [2021-08-21 12:48:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:33,057 INFO L225 Difference]: With dead ends: 426 [2021-08-21 12:48:33,057 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 12:48:33,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:48:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 12:48:33,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 368. [2021-08-21 12:48:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.1444141689373297) internal successors, (787), 367 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 787 transitions. [2021-08-21 12:48:33,061 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 787 transitions. Word has length 29 [2021-08-21 12:48:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:33,061 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 787 transitions. [2021-08-21 12:48:33,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-08-21 12:48:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 787 transitions. [2021-08-21 12:48:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:33,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:33,062 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:33,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:33,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:33,277 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1411856973, now seen corresponding path program 63 times [2021-08-21 12:48:33,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:33,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597334799] [2021-08-21 12:48:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:33,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:33,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:33,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597334799] [2021-08-21 12:48:33,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597334799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:33,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869675686] [2021-08-21 12:48:33,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:48:33,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:33,516 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) [2021-08-21 12:48:33,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:48:35,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:48:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:35,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:35,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:36,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869675686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:36,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:36,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 12:48:36,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112754562] [2021-08-21 12:48:36,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:48:36,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:36,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:48:36,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:48:36,068 INFO L87 Difference]: Start difference. First operand 368 states and 787 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:38,262 INFO L93 Difference]: Finished difference Result 673 states and 1361 transitions. [2021-08-21 12:48:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 12:48:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-08-21 12:48:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:38,264 INFO L225 Difference]: With dead ends: 673 [2021-08-21 12:48:38,264 INFO L226 Difference]: Without dead ends: 643 [2021-08-21 12:48:38,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 2068.2ms TimeCoverageRelationStatistics Valid=1156, Invalid=5984, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 12:48:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-08-21 12:48:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 327. [2021-08-21 12:48:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.1564417177914113) internal successors, (703), 326 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 703 transitions. [2021-08-21 12:48:38,269 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 703 transitions. Word has length 29 [2021-08-21 12:48:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:38,269 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 703 transitions. [2021-08-21 12:48:38,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 703 transitions. [2021-08-21 12:48:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:38,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:38,270 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:38,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 12:48:38,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:48:38,470 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:38,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1003752595, now seen corresponding path program 64 times [2021-08-21 12:48:38,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:38,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992041379] [2021-08-21 12:48:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:38,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:38,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:38,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992041379] [2021-08-21 12:48:38,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992041379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:38,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554583300] [2021-08-21 12:48:38,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:48:38,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:38,659 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) [2021-08-21 12:48:38,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:48:40,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:48:40,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:40,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:48:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:41,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554583300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:41,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:41,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 12:48:41,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131612941] [2021-08-21 12:48:41,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:48:41,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:41,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:48:41,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:48:41,181 INFO L87 Difference]: Start difference. First operand 327 states and 703 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:42,449 INFO L93 Difference]: Finished difference Result 557 states and 1137 transitions. [2021-08-21 12:48:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 12:48:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-08-21 12:48:42,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:42,450 INFO L225 Difference]: With dead ends: 557 [2021-08-21 12:48:42,450 INFO L226 Difference]: Without dead ends: 530 [2021-08-21 12:48:42,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1189.0ms TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 12:48:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-08-21 12:48:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 202. [2021-08-21 12:48:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.054726368159204) internal successors, (413), 201 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 413 transitions. [2021-08-21 12:48:42,454 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 413 transitions. Word has length 29 [2021-08-21 12:48:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:42,454 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 413 transitions. [2021-08-21 12:48:42,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 413 transitions. [2021-08-21 12:48:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:48:42,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:42,455 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:42,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 12:48:42,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:42,669 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash -160443029, now seen corresponding path program 65 times [2021-08-21 12:48:42,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:42,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850082852] [2021-08-21 12:48:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:42,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:42,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:42,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850082852] [2021-08-21 12:48:42,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850082852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:42,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973375387] [2021-08-21 12:48:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:48:42,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:42,967 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) [2021-08-21 12:48:42,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:48:44,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:48:44,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:44,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 12:48:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:45,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973375387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:45,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:45,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 12:48:45,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809892924] [2021-08-21 12:48:45,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:48:45,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:45,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:48:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:48:45,453 INFO L87 Difference]: Start difference. First operand 202 states and 413 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:46,814 INFO L93 Difference]: Finished difference Result 375 states and 746 transitions. [2021-08-21 12:48:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 12:48:46,815 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 29 [2021-08-21 12:48:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:46,815 INFO L225 Difference]: With dead ends: 375 [2021-08-21 12:48:46,815 INFO L226 Difference]: Without dead ends: 337 [2021-08-21 12:48:46,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1370.1ms TimeCoverageRelationStatistics Valid=573, Invalid=3459, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 12:48:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-21 12:48:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 214. [2021-08-21 12:48:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 437 transitions. [2021-08-21 12:48:46,818 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 437 transitions. Word has length 29 [2021-08-21 12:48:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:46,818 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 437 transitions. [2021-08-21 12:48:46,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 437 transitions. [2021-08-21 12:48:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:48:46,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:46,819 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:46,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:47,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 12:48:47,019 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:47,020 INFO L82 PathProgramCache]: Analyzing trace with hash 524451993, now seen corresponding path program 66 times [2021-08-21 12:48:47,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:47,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867937084] [2021-08-21 12:48:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:47,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:47,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:47,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867937084] [2021-08-21 12:48:47,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867937084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:47,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230677036] [2021-08-21 12:48:47,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:48:47,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:47,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:47,260 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) [2021-08-21 12:48:47,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:48:49,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:48:49,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:49,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:48:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:49,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230677036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:49,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:49,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-21 12:48:49,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388173536] [2021-08-21 12:48:49,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 12:48:49,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:49,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 12:48:49,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:48:49,850 INFO L87 Difference]: Start difference. First operand 214 states and 437 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:51,119 INFO L93 Difference]: Finished difference Result 456 states and 888 transitions. [2021-08-21 12:48:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:48:51,120 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:48:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:51,120 INFO L225 Difference]: With dead ends: 456 [2021-08-21 12:48:51,120 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 12:48:51,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1288.1ms TimeCoverageRelationStatistics Valid=731, Invalid=4969, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 12:48:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 12:48:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 263. [2021-08-21 12:48:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.118320610687023) internal successors, (555), 262 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 555 transitions. [2021-08-21 12:48:51,124 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 555 transitions. Word has length 31 [2021-08-21 12:48:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:51,124 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 555 transitions. [2021-08-21 12:48:51,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 555 transitions. [2021-08-21 12:48:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:48:51,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:51,124 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:51,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 12:48:51,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:48:51,325 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -246601951, now seen corresponding path program 67 times [2021-08-21 12:48:51,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:51,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257607219] [2021-08-21 12:48:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:51,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:51,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:51,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257607219] [2021-08-21 12:48:51,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257607219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:51,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844018140] [2021-08-21 12:48:51,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:48:51,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:51,568 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) [2021-08-21 12:48:51,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:48:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:53,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:48:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844018140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:54,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:54,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:48:54,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338349220] [2021-08-21 12:48:54,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:48:54,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:48:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:54,175 INFO L87 Difference]: Start difference. First operand 263 states and 555 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:48:55,563 INFO L93 Difference]: Finished difference Result 476 states and 921 transitions. [2021-08-21 12:48:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 12:48:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:48:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:48:55,564 INFO L225 Difference]: With dead ends: 476 [2021-08-21 12:48:55,564 INFO L226 Difference]: Without dead ends: 432 [2021-08-21 12:48:55,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1364.7ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 12:48:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-21 12:48:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 265. [2021-08-21 12:48:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.117424242424242) internal successors, (559), 264 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 559 transitions. [2021-08-21 12:48:55,568 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 559 transitions. Word has length 31 [2021-08-21 12:48:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:48:55,568 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 559 transitions. [2021-08-21 12:48:55,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:48:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 559 transitions. [2021-08-21 12:48:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:48:55,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:48:55,569 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:48:55,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:48:55,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:48:55,769 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:48:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:48:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 849440869, now seen corresponding path program 68 times [2021-08-21 12:48:55,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:48:55,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131297376] [2021-08-21 12:48:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:48:55,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:48:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:48:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:56,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:48:56,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131297376] [2021-08-21 12:48:56,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131297376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:56,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409443984] [2021-08-21 12:48:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:48:56,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:48:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:48:56,026 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) [2021-08-21 12:48:56,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:48:58,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:48:58,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:48:58,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:48:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:48:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:48:58,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409443984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:48:58,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:48:58,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:48:58,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167404227] [2021-08-21 12:48:58,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:48:58,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:48:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:48:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:48:58,694 INFO L87 Difference]: Start difference. First operand 265 states and 559 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:00,301 INFO L93 Difference]: Finished difference Result 474 states and 919 transitions. [2021-08-21 12:49:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 12:49:00,302 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:00,302 INFO L225 Difference]: With dead ends: 474 [2021-08-21 12:49:00,302 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:49:00,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1489.1ms TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 12:49:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:49:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 267. [2021-08-21 12:49:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1165413533834587) internal successors, (563), 266 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 563 transitions. [2021-08-21 12:49:00,306 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 563 transitions. Word has length 31 [2021-08-21 12:49:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:00,306 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 563 transitions. [2021-08-21 12:49:00,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 563 transitions. [2021-08-21 12:49:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:00,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:00,307 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:00,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 12:49:00,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 12:49:00,507 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1681865385, now seen corresponding path program 69 times [2021-08-21 12:49:00,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:00,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397853262] [2021-08-21 12:49:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:00,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:00,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:00,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397853262] [2021-08-21 12:49:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397853262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:00,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17235372] [2021-08-21 12:49:00,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:00,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:00,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:00,778 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) [2021-08-21 12:49:00,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:49:02,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:49:02,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:02,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:03,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17235372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:03,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:03,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:03,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270938724] [2021-08-21 12:49:03,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:03,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:03,514 INFO L87 Difference]: Start difference. First operand 267 states and 563 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:05,351 INFO L93 Difference]: Finished difference Result 519 states and 1002 transitions. [2021-08-21 12:49:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-21 12:49:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:05,353 INFO L225 Difference]: With dead ends: 519 [2021-08-21 12:49:05,353 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:49:05,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 1715.7ms TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 12:49:05,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:49:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 270. [2021-08-21 12:49:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.1226765799256504) internal successors, (571), 269 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:05,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 571 transitions. [2021-08-21 12:49:05,356 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 571 transitions. Word has length 31 [2021-08-21 12:49:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:05,357 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 571 transitions. [2021-08-21 12:49:05,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 571 transitions. [2021-08-21 12:49:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:05,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:05,357 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:05,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 12:49:05,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:05,558 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash 416937525, now seen corresponding path program 70 times [2021-08-21 12:49:05,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:05,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551863279] [2021-08-21 12:49:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:05,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:05,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:05,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551863279] [2021-08-21 12:49:05,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551863279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:05,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109551472] [2021-08-21 12:49:05,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:05,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:05,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:05,841 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) [2021-08-21 12:49:05,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:49:08,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:08,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:08,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:08,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109551472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:08,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:08,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:08,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224769788] [2021-08-21 12:49:08,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:08,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:08,569 INFO L87 Difference]: Start difference. First operand 270 states and 571 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:10,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:10,139 INFO L93 Difference]: Finished difference Result 453 states and 882 transitions. [2021-08-21 12:49:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:49:10,139 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:10,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:10,140 INFO L225 Difference]: With dead ends: 453 [2021-08-21 12:49:10,140 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 12:49:10,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1523.1ms TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 12:49:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 12:49:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 266. [2021-08-21 12:49:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.1132075471698113) internal successors, (560), 265 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 560 transitions. [2021-08-21 12:49:10,143 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 560 transitions. Word has length 31 [2021-08-21 12:49:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:10,150 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 560 transitions. [2021-08-21 12:49:10,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 560 transitions. [2021-08-21 12:49:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:10,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:10,151 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:10,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:10,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:10,351 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash 3781099, now seen corresponding path program 71 times [2021-08-21 12:49:10,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:10,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403903270] [2021-08-21 12:49:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:10,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:10,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:10,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403903270] [2021-08-21 12:49:10,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403903270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:10,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800049401] [2021-08-21 12:49:10,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:10,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:10,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:10,557 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) [2021-08-21 12:49:10,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:49:12,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:49:12,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:12,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:12,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:13,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800049401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:13,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:13,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:13,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121026240] [2021-08-21 12:49:13,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:13,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:13,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:13,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:13,334 INFO L87 Difference]: Start difference. First operand 266 states and 560 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:14,639 INFO L93 Difference]: Finished difference Result 455 states and 888 transitions. [2021-08-21 12:49:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 12:49:14,639 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:14,640 INFO L225 Difference]: With dead ends: 455 [2021-08-21 12:49:14,640 INFO L226 Difference]: Without dead ends: 417 [2021-08-21 12:49:14,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1292.1ms TimeCoverageRelationStatistics Valid=747, Invalid=5573, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 12:49:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-21 12:49:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 276. [2021-08-21 12:49:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.109090909090909) internal successors, (580), 275 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 580 transitions. [2021-08-21 12:49:14,643 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 580 transitions. Word has length 31 [2021-08-21 12:49:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:14,643 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 580 transitions. [2021-08-21 12:49:14,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 580 transitions. [2021-08-21 12:49:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:14,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:14,644 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:14,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:14,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:14,869 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 836205615, now seen corresponding path program 72 times [2021-08-21 12:49:14,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:14,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998226493] [2021-08-21 12:49:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:14,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:15,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:15,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998226493] [2021-08-21 12:49:15,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998226493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:15,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205641434] [2021-08-21 12:49:15,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:15,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:15,094 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) [2021-08-21 12:49:15,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:49:17,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:49:17,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:17,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:17,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205641434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:17,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:17,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:17,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646063570] [2021-08-21 12:49:17,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:17,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:17,931 INFO L87 Difference]: Start difference. First operand 276 states and 580 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:19,465 INFO L93 Difference]: Finished difference Result 508 states and 986 transitions. [2021-08-21 12:49:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:49:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:19,466 INFO L225 Difference]: With dead ends: 508 [2021-08-21 12:49:19,466 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 12:49:19,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 1433.4ms TimeCoverageRelationStatistics Valid=865, Invalid=6107, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 12:49:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 12:49:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 278. [2021-08-21 12:49:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.111913357400722) internal successors, (585), 277 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 585 transitions. [2021-08-21 12:49:19,470 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 585 transitions. Word has length 31 [2021-08-21 12:49:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:19,470 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 585 transitions. [2021-08-21 12:49:19,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 585 transitions. [2021-08-21 12:49:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:19,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:19,471 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:19,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:19,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 12:49:19,671 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash -428722245, now seen corresponding path program 73 times [2021-08-21 12:49:19,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:19,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507002221] [2021-08-21 12:49:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:19,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:19,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:19,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507002221] [2021-08-21 12:49:19,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507002221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:19,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806672712] [2021-08-21 12:49:19,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:19,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:19,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:19,912 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) [2021-08-21 12:49:19,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:49:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:22,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:22,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806672712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:22,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:22,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:22,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889003449] [2021-08-21 12:49:22,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:22,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:22,764 INFO L87 Difference]: Start difference. First operand 278 states and 585 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:24,111 INFO L93 Difference]: Finished difference Result 438 states and 865 transitions. [2021-08-21 12:49:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:49:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:24,113 INFO L225 Difference]: With dead ends: 438 [2021-08-21 12:49:24,113 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 12:49:24,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 1318.3ms TimeCoverageRelationStatistics Valid=801, Invalid=5051, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 12:49:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 12:49:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 274. [2021-08-21 12:49:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.0952380952380953) internal successors, (572), 273 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 572 transitions. [2021-08-21 12:49:24,116 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 572 transitions. Word has length 31 [2021-08-21 12:49:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:24,116 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 572 transitions. [2021-08-21 12:49:24,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 572 transitions. [2021-08-21 12:49:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:24,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:24,117 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:24,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:24,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:24,317 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash -894564117, now seen corresponding path program 74 times [2021-08-21 12:49:24,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:24,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306667576] [2021-08-21 12:49:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:24,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:24,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:24,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306667576] [2021-08-21 12:49:24,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306667576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:24,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225198097] [2021-08-21 12:49:24,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:24,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:24,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:24,573 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) [2021-08-21 12:49:24,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:49:26,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:26,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:27,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225198097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:27,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:27,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:27,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428830941] [2021-08-21 12:49:27,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:27,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:27,485 INFO L87 Difference]: Start difference. First operand 274 states and 572 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:29,344 INFO L93 Difference]: Finished difference Result 526 states and 1041 transitions. [2021-08-21 12:49:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 12:49:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:29,345 INFO L225 Difference]: With dead ends: 526 [2021-08-21 12:49:29,345 INFO L226 Difference]: Without dead ends: 478 [2021-08-21 12:49:29,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 1807.0ms TimeCoverageRelationStatistics Valid=945, Invalid=6887, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 12:49:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-08-21 12:49:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 287. [2021-08-21 12:49:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.104895104895105) internal successors, (602), 286 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 602 transitions. [2021-08-21 12:49:29,349 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 602 transitions. Word has length 31 [2021-08-21 12:49:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:29,349 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 602 transitions. [2021-08-21 12:49:29,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 602 transitions. [2021-08-21 12:49:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:29,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:29,349 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:29,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:29,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:29,569 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2135475319, now seen corresponding path program 75 times [2021-08-21 12:49:29,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:29,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823852525] [2021-08-21 12:49:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:29,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:29,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:29,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823852525] [2021-08-21 12:49:29,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823852525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:29,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257287128] [2021-08-21 12:49:29,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:29,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:29,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:29,776 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) [2021-08-21 12:49:29,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:49:32,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:49:32,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:32,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 12:49:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:32,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257287128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:32,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:32,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:32,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572014686] [2021-08-21 12:49:32,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:32,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:32,777 INFO L87 Difference]: Start difference. First operand 287 states and 602 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:34,423 INFO L93 Difference]: Finished difference Result 494 states and 981 transitions. [2021-08-21 12:49:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:49:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:34,424 INFO L225 Difference]: With dead ends: 494 [2021-08-21 12:49:34,424 INFO L226 Difference]: Without dead ends: 467 [2021-08-21 12:49:34,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 1563.4ms TimeCoverageRelationStatistics Valid=893, Invalid=5913, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 12:49:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-21 12:49:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 259. [2021-08-21 12:49:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.062015503875969) internal successors, (532), 258 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 532 transitions. [2021-08-21 12:49:34,428 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 532 transitions. Word has length 31 [2021-08-21 12:49:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:34,428 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 532 transitions. [2021-08-21 12:49:34,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 532 transitions. [2021-08-21 12:49:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:49:34,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:34,428 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:34,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:34,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-21 12:49:34,653 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:34,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash -481443467, now seen corresponding path program 76 times [2021-08-21 12:49:34,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:34,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745214712] [2021-08-21 12:49:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:34,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:49:34,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:34,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745214712] [2021-08-21 12:49:34,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745214712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:34,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047426722] [2021-08-21 12:49:34,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:49:34,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:34,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:34,864 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) [2021-08-21 12:49:34,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:49:37,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:49:37,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:37,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 12:49:37,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:37,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047426722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:37,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:37,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-21 12:49:37,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715489591] [2021-08-21 12:49:37,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:49:37,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:49:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:49:37,956 INFO L87 Difference]: Start difference. First operand 259 states and 532 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:38,781 INFO L93 Difference]: Finished difference Result 458 states and 912 transitions. [2021-08-21 12:49:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:49:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:49:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:38,782 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:49:38,782 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 12:49:38,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 12:49:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 12:49:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 249. [2021-08-21 12:49:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.056451612903226) internal successors, (510), 248 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 510 transitions. [2021-08-21 12:49:38,785 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 510 transitions. Word has length 31 [2021-08-21 12:49:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:38,785 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 510 transitions. [2021-08-21 12:49:38,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 510 transitions. [2021-08-21 12:49:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:49:38,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:38,786 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:38,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:38,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:49:38,986 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1729938153, now seen corresponding path program 77 times [2021-08-21 12:49:38,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:38,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79451588] [2021-08-21 12:49:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:38,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:49:39,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:39,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79451588] [2021-08-21 12:49:39,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79451588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:39,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979816751] [2021-08-21 12:49:39,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:49:39,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:39,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:39,056 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) [2021-08-21 12:49:39,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:49:41,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:49:41,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:49:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:49:41,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979816751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:41,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:41,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:49:41,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123249272] [2021-08-21 12:49:41,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:49:41,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:49:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:49:41,676 INFO L87 Difference]: Start difference. First operand 249 states and 510 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:41,749 INFO L93 Difference]: Finished difference Result 383 states and 776 transitions. [2021-08-21 12:49:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:49:41,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 33 [2021-08-21 12:49:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:41,750 INFO L225 Difference]: With dead ends: 383 [2021-08-21 12:49:41,750 INFO L226 Difference]: Without dead ends: 344 [2021-08-21 12:49:41,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:49:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-21 12:49:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 215. [2021-08-21 12:49:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.046728971962617) internal successors, (438), 214 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 438 transitions. [2021-08-21 12:49:41,752 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 438 transitions. Word has length 33 [2021-08-21 12:49:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:41,752 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 438 transitions. [2021-08-21 12:49:41,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:41,752 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 438 transitions. [2021-08-21 12:49:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:49:41,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:41,753 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:41,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:49:41,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:41,958 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1614041437, now seen corresponding path program 78 times [2021-08-21 12:49:41,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:41,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622571526] [2021-08-21 12:49:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:41,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:49:42,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:42,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622571526] [2021-08-21 12:49:42,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622571526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:42,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166578511] [2021-08-21 12:49:42,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:49:42,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:42,257 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) [2021-08-21 12:49:42,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:49:44,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:49:44,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:44,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 12:49:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166578511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:45,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 12:49:45,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232762264] [2021-08-21 12:49:45,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:49:45,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:45,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:49:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:49:45,357 INFO L87 Difference]: Start difference. First operand 215 states and 438 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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) [2021-08-21 12:49:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:46,651 INFO L93 Difference]: Finished difference Result 358 states and 704 transitions. [2021-08-21 12:49:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:49:46,651 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 33 [2021-08-21 12:49:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:46,652 INFO L225 Difference]: With dead ends: 358 [2021-08-21 12:49:46,652 INFO L226 Difference]: Without dead ends: 326 [2021-08-21 12:49:46,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1196.1ms TimeCoverageRelationStatistics Valid=400, Invalid=3890, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 12:49:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-08-21 12:49:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 195. [2021-08-21 12:49:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.051546391752577) internal successors, (398), 194 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 398 transitions. [2021-08-21 12:49:46,655 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 398 transitions. Word has length 33 [2021-08-21 12:49:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:46,655 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 398 transitions. [2021-08-21 12:49:46,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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) [2021-08-21 12:49:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 398 transitions. [2021-08-21 12:49:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:49:46,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:46,655 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:46,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 12:49:46,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:46,856 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:46,856 INFO L82 PathProgramCache]: Analyzing trace with hash 52760445, now seen corresponding path program 79 times [2021-08-21 12:49:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:46,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950238800] [2021-08-21 12:49:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:46,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:49:47,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:47,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950238800] [2021-08-21 12:49:47,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950238800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:47,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797395614] [2021-08-21 12:49:47,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:49:47,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:47,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:47,078 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) [2021-08-21 12:49:47,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:49:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:49,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:49:49,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:50,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797395614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:50,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:50,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-08-21 12:49:50,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981140730] [2021-08-21 12:49:50,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:49:50,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:49:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:49:50,254 INFO L87 Difference]: Start difference. First operand 195 states and 398 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:51,154 INFO L93 Difference]: Finished difference Result 378 states and 752 transitions. [2021-08-21 12:49:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:49:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:49:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:51,155 INFO L225 Difference]: With dead ends: 378 [2021-08-21 12:49:51,155 INFO L226 Difference]: Without dead ends: 364 [2021-08-21 12:49:51,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 12:49:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-21 12:49:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 164. [2021-08-21 12:49:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.01840490797546) internal successors, (329), 163 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 329 transitions. [2021-08-21 12:49:51,158 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 329 transitions. Word has length 33 [2021-08-21 12:49:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:51,158 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 329 transitions. [2021-08-21 12:49:51,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 329 transitions. [2021-08-21 12:49:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:49:51,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:51,158 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:51,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 12:49:51,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:51,359 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1860569387, now seen corresponding path program 80 times [2021-08-21 12:49:51,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:51,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180288551] [2021-08-21 12:49:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:51,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:51,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:51,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180288551] [2021-08-21 12:49:51,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180288551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:51,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789634367] [2021-08-21 12:49:51,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:49:51,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:51,636 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) [2021-08-21 12:49:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:49:54,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:49:54,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:54,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:49:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:54,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789634367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:54,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:54,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:49:54,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518260956] [2021-08-21 12:49:54,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:49:54,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:49:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:49:54,805 INFO L87 Difference]: Start difference. First operand 164 states and 329 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:49:56,260 INFO L93 Difference]: Finished difference Result 457 states and 890 transitions. [2021-08-21 12:49:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 12:49:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:49:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:49:56,261 INFO L225 Difference]: With dead ends: 457 [2021-08-21 12:49:56,261 INFO L226 Difference]: Without dead ends: 396 [2021-08-21 12:49:56,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1516.5ms TimeCoverageRelationStatistics Valid=908, Invalid=6232, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 12:49:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-21 12:49:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 218. [2021-08-21 12:49:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.1152073732718892) internal successors, (459), 217 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 459 transitions. [2021-08-21 12:49:56,264 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 459 transitions. Word has length 35 [2021-08-21 12:49:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:49:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 459 transitions. [2021-08-21 12:49:56,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:49:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 459 transitions. [2021-08-21 12:49:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:49:56,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:49:56,265 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:49:56,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 12:49:56,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:56,465 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:49:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:49:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash 185932637, now seen corresponding path program 81 times [2021-08-21 12:49:56,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:49:56,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380704949] [2021-08-21 12:49:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:49:56,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:49:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:49:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:56,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:49:56,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380704949] [2021-08-21 12:49:56,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380704949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:56,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292648523] [2021-08-21 12:49:56,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:49:56,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:49:56,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:49:56,760 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) [2021-08-21 12:49:56,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:49:59,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:49:59,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:49:59,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:49:59,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:49:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:49:59,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292648523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:49:59,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:49:59,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:49:59,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978399074] [2021-08-21 12:49:59,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:49:59,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:49:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:49:59,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:49:59,987 INFO L87 Difference]: Start difference. First operand 218 states and 459 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:01,655 INFO L93 Difference]: Finished difference Result 483 states and 933 transitions. [2021-08-21 12:50:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-21 12:50:01,655 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:01,656 INFO L225 Difference]: With dead ends: 483 [2021-08-21 12:50:01,656 INFO L226 Difference]: Without dead ends: 433 [2021-08-21 12:50:01,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1616.4ms TimeCoverageRelationStatistics Valid=992, Invalid=7018, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 12:50:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-21 12:50:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 220. [2021-08-21 12:50:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.1141552511415527) internal successors, (463), 219 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 463 transitions. [2021-08-21 12:50:01,659 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 463 transitions. Word has length 35 [2021-08-21 12:50:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:01,660 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 463 transitions. [2021-08-21 12:50:01,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 463 transitions. [2021-08-21 12:50:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:01,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:01,660 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:01,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:01,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:01,879 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1216095137, now seen corresponding path program 82 times [2021-08-21 12:50:01,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:01,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733123597] [2021-08-21 12:50:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:01,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:02,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:02,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733123597] [2021-08-21 12:50:02,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733123597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:02,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772505571] [2021-08-21 12:50:02,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:02,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:02,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:02,126 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) [2021-08-21 12:50:02,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:50:04,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:04,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:04,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:50:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:05,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772505571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:05,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465254689] [2021-08-21 12:50:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:05,434 INFO L87 Difference]: Start difference. First operand 220 states and 463 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:07,214 INFO L93 Difference]: Finished difference Result 481 states and 931 transitions. [2021-08-21 12:50:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:50:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:07,215 INFO L225 Difference]: With dead ends: 481 [2021-08-21 12:50:07,215 INFO L226 Difference]: Without dead ends: 437 [2021-08-21 12:50:07,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 1683.5ms TimeCoverageRelationStatistics Valid=1089, Invalid=7841, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 12:50:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-21 12:50:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 222. [2021-08-21 12:50:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.1131221719457014) internal successors, (467), 221 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 467 transitions. [2021-08-21 12:50:07,219 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 467 transitions. Word has length 35 [2021-08-21 12:50:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:07,219 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 467 transitions. [2021-08-21 12:50:07,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 467 transitions. [2021-08-21 12:50:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:07,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:07,219 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:07,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:07,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-21 12:50:07,433 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1982829339, now seen corresponding path program 83 times [2021-08-21 12:50:07,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:07,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435727218] [2021-08-21 12:50:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:07,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:07,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:07,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435727218] [2021-08-21 12:50:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435727218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:07,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422316863] [2021-08-21 12:50:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:50:07,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:07,703 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) [2021-08-21 12:50:07,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:50:10,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:50:10,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:10,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:50:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:11,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422316863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:11,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:11,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:11,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72560774] [2021-08-21 12:50:11,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:11,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:11,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:11,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:11,048 INFO L87 Difference]: Start difference. First operand 222 states and 467 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:13,006 INFO L93 Difference]: Finished difference Result 479 states and 929 transitions. [2021-08-21 12:50:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-21 12:50:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:13,007 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:50:13,007 INFO L226 Difference]: Without dead ends: 441 [2021-08-21 12:50:13,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3039 ImplicationChecksByTransitivity, 1810.0ms TimeCoverageRelationStatistics Valid=1211, Invalid=8689, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 12:50:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-21 12:50:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 224. [2021-08-21 12:50:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.1121076233183858) internal successors, (471), 223 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 471 transitions. [2021-08-21 12:50:13,010 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 471 transitions. Word has length 35 [2021-08-21 12:50:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:13,010 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 471 transitions. [2021-08-21 12:50:13,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 471 transitions. [2021-08-21 12:50:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:13,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:13,011 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:13,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:13,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:13,211 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404823, now seen corresponding path program 84 times [2021-08-21 12:50:13,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:13,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297783509] [2021-08-21 12:50:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:13,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:13,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:13,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297783509] [2021-08-21 12:50:13,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297783509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:13,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199427574] [2021-08-21 12:50:13,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:13,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:13,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:13,533 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) [2021-08-21 12:50:13,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:50:16,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:50:16,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:16,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:50:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:17,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199427574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:17,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:17,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:17,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768967858] [2021-08-21 12:50:17,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:17,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:17,342 INFO L87 Difference]: Start difference. First operand 224 states and 471 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:20,160 INFO L93 Difference]: Finished difference Result 538 states and 1038 transitions. [2021-08-21 12:50:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-21 12:50:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:20,161 INFO L225 Difference]: With dead ends: 538 [2021-08-21 12:50:20,161 INFO L226 Difference]: Without dead ends: 493 [2021-08-21 12:50:20,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3712 ImplicationChecksByTransitivity, 2555.4ms TimeCoverageRelationStatistics Valid=1437, Invalid=10995, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 12:50:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-21 12:50:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 227. [2021-08-21 12:50:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1194690265486726) internal successors, (479), 226 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 479 transitions. [2021-08-21 12:50:20,165 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 479 transitions. Word has length 35 [2021-08-21 12:50:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:20,165 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 479 transitions. [2021-08-21 12:50:20,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 479 transitions. [2021-08-21 12:50:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:20,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:20,166 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:20,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:20,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:20,366 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:20,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1879634613, now seen corresponding path program 85 times [2021-08-21 12:50:20,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:20,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125965821] [2021-08-21 12:50:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:20,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:20,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:20,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125965821] [2021-08-21 12:50:20,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125965821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:20,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896158569] [2021-08-21 12:50:20,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:20,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:20,625 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) [2021-08-21 12:50:20,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:50:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:23,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:50:23,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:24,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896158569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:24,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:24,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:24,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136185355] [2021-08-21 12:50:24,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:24,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:24,087 INFO L87 Difference]: Start difference. First operand 227 states and 479 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:25,888 INFO L93 Difference]: Finished difference Result 433 states and 843 transitions. [2021-08-21 12:50:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:50:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:25,889 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:50:25,889 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 12:50:25,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 1721.7ms TimeCoverageRelationStatistics Valid=1219, Invalid=7711, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 12:50:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 12:50:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 228. [2021-08-21 12:50:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.118942731277533) internal successors, (481), 227 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 481 transitions. [2021-08-21 12:50:25,893 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 481 transitions. Word has length 35 [2021-08-21 12:50:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:25,893 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 481 transitions. [2021-08-21 12:50:25,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 481 transitions. [2021-08-21 12:50:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:25,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:25,894 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:25,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 12:50:26,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:26,094 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash 285875111, now seen corresponding path program 86 times [2021-08-21 12:50:26,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:26,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276812765] [2021-08-21 12:50:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:26,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:26,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:26,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276812765] [2021-08-21 12:50:26,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276812765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:26,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294193607] [2021-08-21 12:50:26,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:50:26,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:26,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:26,339 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) [2021-08-21 12:50:26,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:50:29,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:50:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:29,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:50:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:29,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294193607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:29,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:29,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:29,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650655658] [2021-08-21 12:50:29,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:29,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:29,911 INFO L87 Difference]: Start difference. First operand 228 states and 481 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:31,519 INFO L93 Difference]: Finished difference Result 472 states and 922 transitions. [2021-08-21 12:50:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 12:50:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:31,520 INFO L225 Difference]: With dead ends: 472 [2021-08-21 12:50:31,520 INFO L226 Difference]: Without dead ends: 428 [2021-08-21 12:50:31,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 1542.0ms TimeCoverageRelationStatistics Valid=925, Invalid=7085, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 12:50:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-21 12:50:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 234. [2021-08-21 12:50:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.11587982832618) internal successors, (493), 233 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 493 transitions. [2021-08-21 12:50:31,523 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 493 transitions. Word has length 35 [2021-08-21 12:50:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:31,524 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 493 transitions. [2021-08-21 12:50:31,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 493 transitions. [2021-08-21 12:50:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:31,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:31,524 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:31,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:31,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:31,725 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1381917931, now seen corresponding path program 87 times [2021-08-21 12:50:31,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:31,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669697601] [2021-08-21 12:50:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:31,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:31,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:31,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669697601] [2021-08-21 12:50:31,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669697601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:31,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346289661] [2021-08-21 12:50:31,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:50:31,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:31,972 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) [2021-08-21 12:50:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:50:34,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:50:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:34,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 12:50:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:36,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346289661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:36,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:36,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:36,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974274248] [2021-08-21 12:50:36,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:36,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:36,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:36,073 INFO L87 Difference]: Start difference. First operand 234 states and 493 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:38,627 INFO L93 Difference]: Finished difference Result 479 states and 947 transitions. [2021-08-21 12:50:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:50:38,627 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:38,628 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:50:38,628 INFO L226 Difference]: Without dead ends: 441 [2021-08-21 12:50:38,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 2385.8ms TimeCoverageRelationStatistics Valid=1097, Invalid=9409, Unknown=0, NotChecked=0, Total=10506 [2021-08-21 12:50:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-21 12:50:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 240. [2021-08-21 12:50:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1297071129707112) internal successors, (509), 239 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 509 transitions. [2021-08-21 12:50:38,632 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 509 transitions. Word has length 35 [2021-08-21 12:50:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:38,632 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 509 transitions. [2021-08-21 12:50:38,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 509 transitions. [2021-08-21 12:50:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:38,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:38,633 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:38,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:50:38,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:38,849 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2080624849, now seen corresponding path program 88 times [2021-08-21 12:50:38,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:38,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621285635] [2021-08-21 12:50:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:38,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:39,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:39,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621285635] [2021-08-21 12:50:39,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621285635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:39,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661946361] [2021-08-21 12:50:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:50:39,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:39,109 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) [2021-08-21 12:50:39,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:50:42,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:50:42,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:42,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:50:42,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661946361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:42,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:42,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:42,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828713775] [2021-08-21 12:50:42,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:42,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:42,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:42,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:42,686 INFO L87 Difference]: Start difference. First operand 240 states and 509 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:44,656 INFO L93 Difference]: Finished difference Result 549 states and 1079 transitions. [2021-08-21 12:50:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-21 12:50:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:44,657 INFO L225 Difference]: With dead ends: 549 [2021-08-21 12:50:44,657 INFO L226 Difference]: Without dead ends: 504 [2021-08-21 12:50:44,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 1829.8ms TimeCoverageRelationStatistics Valid=1187, Invalid=8515, Unknown=0, NotChecked=0, Total=9702 [2021-08-21 12:50:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-21 12:50:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 244. [2021-08-21 12:50:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.139917695473251) internal successors, (520), 243 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 520 transitions. [2021-08-21 12:50:44,661 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 520 transitions. Word has length 35 [2021-08-21 12:50:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:44,661 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 520 transitions. [2021-08-21 12:50:44,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 520 transitions. [2021-08-21 12:50:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:44,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:44,661 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:44,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 12:50:44,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-21 12:50:44,862 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:44,862 INFO L82 PathProgramCache]: Analyzing trace with hash 949414587, now seen corresponding path program 89 times [2021-08-21 12:50:44,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:44,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917631012] [2021-08-21 12:50:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:44,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:45,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:45,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917631012] [2021-08-21 12:50:45,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917631012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:45,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883531158] [2021-08-21 12:50:45,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:50:45,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:45,137 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) [2021-08-21 12:50:45,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:50:48,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:50:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:48,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:50:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:48,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883531158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:48,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:48,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:48,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064167920] [2021-08-21 12:50:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:48,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:48,803 INFO L87 Difference]: Start difference. First operand 244 states and 520 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:50,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:50,528 INFO L93 Difference]: Finished difference Result 456 states and 913 transitions. [2021-08-21 12:50:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 12:50:50,528 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:50,529 INFO L225 Difference]: With dead ends: 456 [2021-08-21 12:50:50,529 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:50:50,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 1667.6ms TimeCoverageRelationStatistics Valid=1108, Invalid=7082, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 12:50:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:50:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 234. [2021-08-21 12:50:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.124463519313305) internal successors, (495), 233 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 495 transitions. [2021-08-21 12:50:50,533 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 495 transitions. Word has length 35 [2021-08-21 12:50:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:50,533 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 495 transitions. [2021-08-21 12:50:50,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 495 transitions. [2021-08-21 12:50:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:50,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:50,533 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:50,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 12:50:50,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:50,734 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash 264549031, now seen corresponding path program 90 times [2021-08-21 12:50:50,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:50,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379006703] [2021-08-21 12:50:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:50,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:50,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:50,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379006703] [2021-08-21 12:50:50,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379006703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:50,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225112293] [2021-08-21 12:50:50,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:50:50,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:50,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:50,977 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) [2021-08-21 12:50:50,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:50:54,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:50:54,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:50:54,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:50:54,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:50:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:54,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225112293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:54,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:50:54,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:50:54,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052046825] [2021-08-21 12:50:54,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:50:54,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:50:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:50:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:50:54,921 INFO L87 Difference]: Start difference. First operand 234 states and 495 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:50:57,039 INFO L93 Difference]: Finished difference Result 447 states and 878 transitions. [2021-08-21 12:50:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 12:50:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:50:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:50:57,040 INFO L225 Difference]: With dead ends: 447 [2021-08-21 12:50:57,040 INFO L226 Difference]: Without dead ends: 409 [2021-08-21 12:50:57,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 2016.4ms TimeCoverageRelationStatistics Valid=1040, Invalid=8466, Unknown=0, NotChecked=0, Total=9506 [2021-08-21 12:50:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-21 12:50:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 238. [2021-08-21 12:50:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.1223628691983123) internal successors, (503), 237 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 503 transitions. [2021-08-21 12:50:57,044 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 503 transitions. Word has length 35 [2021-08-21 12:50:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:50:57,044 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 503 transitions. [2021-08-21 12:50:57,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:50:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 503 transitions. [2021-08-21 12:50:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:50:57,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:50:57,044 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:50:57,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 12:50:57,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:57,245 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:50:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:50:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1096973547, now seen corresponding path program 91 times [2021-08-21 12:50:57,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:50:57,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57673421] [2021-08-21 12:50:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:50:57,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:50:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:50:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:50:57,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:50:57,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57673421] [2021-08-21 12:50:57,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57673421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:50:57,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990821052] [2021-08-21 12:50:57,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:50:57,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:50:57,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:50:57,505 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) [2021-08-21 12:50:57,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:51:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:00,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:51:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:01,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990821052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:01,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:01,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:51:01,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527308862] [2021-08-21 12:51:01,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:51:01,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:51:01,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:51:01,245 INFO L87 Difference]: Start difference. First operand 238 states and 503 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:03,181 INFO L93 Difference]: Finished difference Result 512 states and 996 transitions. [2021-08-21 12:51:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-21 12:51:03,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:51:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:03,182 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:51:03,182 INFO L226 Difference]: Without dead ends: 467 [2021-08-21 12:51:03,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3084 ImplicationChecksByTransitivity, 1872.3ms TimeCoverageRelationStatistics Valid=1184, Invalid=8716, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 12:51:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-21 12:51:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 240. [2021-08-21 12:51:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1255230125523012) internal successors, (508), 239 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 508 transitions. [2021-08-21 12:51:03,187 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 508 transitions. Word has length 35 [2021-08-21 12:51:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:03,187 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 508 transitions. [2021-08-21 12:51:03,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 508 transitions. [2021-08-21 12:51:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:51:03,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:03,187 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:03,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 12:51:03,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:03,388 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash -167954313, now seen corresponding path program 92 times [2021-08-21 12:51:03,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:03,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868190420] [2021-08-21 12:51:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:03,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:03,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:03,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868190420] [2021-08-21 12:51:03,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868190420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:03,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108119550] [2021-08-21 12:51:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:51:03,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:03,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:03,656 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) [2021-08-21 12:51:03,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:51:06,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:51:06,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:06,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:51:06,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:07,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108119550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:07,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:07,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:51:07,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863285469] [2021-08-21 12:51:07,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:51:07,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:51:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:51:07,475 INFO L87 Difference]: Start difference. First operand 240 states and 508 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:09,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:09,170 INFO L93 Difference]: Finished difference Result 430 states and 855 transitions. [2021-08-21 12:51:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 12:51:09,171 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:51:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:09,171 INFO L225 Difference]: With dead ends: 430 [2021-08-21 12:51:09,171 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 12:51:09,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 1665.4ms TimeCoverageRelationStatistics Valid=1111, Invalid=7261, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 12:51:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 12:51:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 228. [2021-08-21 12:51:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.092511013215859) internal successors, (475), 227 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 475 transitions. [2021-08-21 12:51:09,175 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 475 transitions. Word has length 35 [2021-08-21 12:51:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:09,175 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 475 transitions. [2021-08-21 12:51:09,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 475 transitions. [2021-08-21 12:51:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:51:09,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:09,176 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:09,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:09,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:09,376 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:09,376 INFO L82 PathProgramCache]: Analyzing trace with hash -633796185, now seen corresponding path program 93 times [2021-08-21 12:51:09,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:09,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36955642] [2021-08-21 12:51:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:09,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:09,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:09,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36955642] [2021-08-21 12:51:09,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36955642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:09,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198264257] [2021-08-21 12:51:09,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:51:09,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:09,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:09,642 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) [2021-08-21 12:51:09,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:51:12,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:51:12,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:12,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 12:51:12,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:13,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198264257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:13,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:13,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:51:13,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139234011] [2021-08-21 12:51:13,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:51:13,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:51:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:51:13,543 INFO L87 Difference]: Start difference. First operand 228 states and 475 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:16,039 INFO L93 Difference]: Finished difference Result 500 states and 994 transitions. [2021-08-21 12:51:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-21 12:51:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:51:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:16,040 INFO L225 Difference]: With dead ends: 500 [2021-08-21 12:51:16,040 INFO L226 Difference]: Without dead ends: 452 [2021-08-21 12:51:16,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3746 ImplicationChecksByTransitivity, 2385.4ms TimeCoverageRelationStatistics Valid=1368, Invalid=9974, Unknown=0, NotChecked=0, Total=11342 [2021-08-21 12:51:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-21 12:51:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 242. [2021-08-21 12:51:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.095435684647303) internal successors, (505), 241 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 505 transitions. [2021-08-21 12:51:16,044 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 505 transitions. Word has length 35 [2021-08-21 12:51:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:16,044 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 505 transitions. [2021-08-21 12:51:16,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 505 transitions. [2021-08-21 12:51:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:51:16,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:16,044 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:16,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:16,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:16,245 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1898724045, now seen corresponding path program 94 times [2021-08-21 12:51:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:16,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984871595] [2021-08-21 12:51:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:16,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:16,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:16,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984871595] [2021-08-21 12:51:16,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984871595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:16,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085235946] [2021-08-21 12:51:16,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:51:16,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:16,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:16,526 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) [2021-08-21 12:51:16,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:51:19,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:51:19,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:19,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 12:51:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:20,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085235946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:20,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:20,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 12:51:20,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471130060] [2021-08-21 12:51:20,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 12:51:20,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:20,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 12:51:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:51:20,399 INFO L87 Difference]: Start difference. First operand 242 states and 505 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:22,520 INFO L93 Difference]: Finished difference Result 469 states and 940 transitions. [2021-08-21 12:51:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:51:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:51:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:22,521 INFO L225 Difference]: With dead ends: 469 [2021-08-21 12:51:22,521 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 12:51:22,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 2061.9ms TimeCoverageRelationStatistics Valid=1224, Invalid=7896, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 12:51:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 12:51:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 210. [2021-08-21 12:51:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0334928229665072) internal successors, (425), 209 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 425 transitions. [2021-08-21 12:51:22,524 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 425 transitions. Word has length 35 [2021-08-21 12:51:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:22,524 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 425 transitions. [2021-08-21 12:51:22,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:22,524 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 425 transitions. [2021-08-21 12:51:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:22,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:22,525 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:22,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 12:51:22,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-21 12:51:22,729 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1582525861, now seen corresponding path program 95 times [2021-08-21 12:51:22,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:22,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111131177] [2021-08-21 12:51:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:22,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:51:22,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:22,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111131177] [2021-08-21 12:51:22,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111131177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:22,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795534454] [2021-08-21 12:51:22,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:51:22,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:22,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:22,820 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) [2021-08-21 12:51:22,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:51:26,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:51:26,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:51:26,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:51:26,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795534454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:26,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:26,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:51:26,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722034052] [2021-08-21 12:51:26,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:51:26,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:26,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:51:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:51:26,248 INFO L87 Difference]: Start difference. First operand 210 states and 425 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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) [2021-08-21 12:51:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:26,330 INFO L93 Difference]: Finished difference Result 342 states and 682 transitions. [2021-08-21 12:51:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:51:26,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 37 [2021-08-21 12:51:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:26,331 INFO L225 Difference]: With dead ends: 342 [2021-08-21 12:51:26,331 INFO L226 Difference]: Without dead ends: 294 [2021-08-21 12:51:26,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:51:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-21 12:51:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 228. [2021-08-21 12:51:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.039647577092511) internal successors, (463), 227 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 463 transitions. [2021-08-21 12:51:26,333 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 463 transitions. Word has length 37 [2021-08-21 12:51:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:26,333 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 463 transitions. [2021-08-21 12:51:26,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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) [2021-08-21 12:51:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 463 transitions. [2021-08-21 12:51:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 12:51:26,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:26,334 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:26,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:26,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 12:51:26,534 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash -244667937, now seen corresponding path program 96 times [2021-08-21 12:51:26,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:26,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533648013] [2021-08-21 12:51:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:26,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:51:26,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533648013] [2021-08-21 12:51:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533648013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100184869] [2021-08-21 12:51:26,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:51:26,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:26,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:26,869 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) [2021-08-21 12:51:26,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:51:30,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:51:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:30,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 12:51:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:31,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100184869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:31,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:31,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-21 12:51:31,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730228346] [2021-08-21 12:51:31,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 12:51:31,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 12:51:31,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:51:31,023 INFO L87 Difference]: Start difference. First operand 228 states and 463 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2021-08-21 12:51:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:33,396 INFO L93 Difference]: Finished difference Result 428 states and 844 transitions. [2021-08-21 12:51:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 12:51:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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 37 [2021-08-21 12:51:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:33,396 INFO L225 Difference]: With dead ends: 428 [2021-08-21 12:51:33,397 INFO L226 Difference]: Without dead ends: 393 [2021-08-21 12:51:33,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 2056.4ms TimeCoverageRelationStatistics Valid=669, Invalid=7703, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 12:51:33,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-08-21 12:51:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 194. [2021-08-21 12:51:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 393 transitions. [2021-08-21 12:51:33,400 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 393 transitions. Word has length 37 [2021-08-21 12:51:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:33,400 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 393 transitions. [2021-08-21 12:51:33,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2021-08-21 12:51:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 393 transitions. [2021-08-21 12:51:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:51:33,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:33,400 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:33,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:33,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:33,617 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash -247873775, now seen corresponding path program 97 times [2021-08-21 12:51:33,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:33,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795304128] [2021-08-21 12:51:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:33,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:33,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:33,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795304128] [2021-08-21 12:51:33,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795304128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:33,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579295660] [2021-08-21 12:51:33,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:51:33,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:33,953 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) [2021-08-21 12:51:33,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:51:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:37,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:51:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:38,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579295660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:38,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:38,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:51:38,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391298000] [2021-08-21 12:51:38,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:51:38,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:38,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:51:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:51:38,023 INFO L87 Difference]: Start difference. First operand 194 states and 393 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:39,815 INFO L93 Difference]: Finished difference Result 542 states and 1063 transitions. [2021-08-21 12:51:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 12:51:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:51:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:39,816 INFO L225 Difference]: With dead ends: 542 [2021-08-21 12:51:39,816 INFO L226 Difference]: Without dead ends: 475 [2021-08-21 12:51:39,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 1856.4ms TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 12:51:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-08-21 12:51:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 258. [2021-08-21 12:51:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.1361867704280155) internal successors, (549), 257 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 549 transitions. [2021-08-21 12:51:39,820 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 549 transitions. Word has length 39 [2021-08-21 12:51:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:39,820 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 549 transitions. [2021-08-21 12:51:39,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 549 transitions. [2021-08-21 12:51:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:51:39,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:39,820 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:39,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:40,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:40,031 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:40,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash -654450279, now seen corresponding path program 98 times [2021-08-21 12:51:40,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:40,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341760138] [2021-08-21 12:51:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:40,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:40,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:40,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341760138] [2021-08-21 12:51:40,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341760138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:40,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117682110] [2021-08-21 12:51:40,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:51:40,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:40,334 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) [2021-08-21 12:51:40,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:51:43,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:51:43,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:43,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:51:43,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:44,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117682110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:44,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:44,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:51:44,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271257591] [2021-08-21 12:51:44,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:51:44,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:51:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:51:44,499 INFO L87 Difference]: Start difference. First operand 258 states and 549 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:46,355 INFO L93 Difference]: Finished difference Result 574 states and 1116 transitions. [2021-08-21 12:51:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 12:51:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:51:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:46,356 INFO L225 Difference]: With dead ends: 574 [2021-08-21 12:51:46,356 INFO L226 Difference]: Without dead ends: 518 [2021-08-21 12:51:46,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 1916.3ms TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 12:51:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-21 12:51:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 260. [2021-08-21 12:51:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.135135135135135) internal successors, (553), 259 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 553 transitions. [2021-08-21 12:51:46,360 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 553 transitions. Word has length 39 [2021-08-21 12:51:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:46,360 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 553 transitions. [2021-08-21 12:51:46,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 553 transitions. [2021-08-21 12:51:46,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:51:46,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:46,360 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:46,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 12:51:46,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 12:51:46,578 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1489234141, now seen corresponding path program 99 times [2021-08-21 12:51:46,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:46,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018890890] [2021-08-21 12:51:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:46,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:46,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:46,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018890890] [2021-08-21 12:51:46,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018890890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:46,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871212418] [2021-08-21 12:51:46,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:51:46,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:46,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:46,921 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) [2021-08-21 12:51:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:51:50,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:51:50,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:50,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:51:50,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:51,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871212418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:51,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:51,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:51:51,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249024489] [2021-08-21 12:51:51,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:51:51,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:51:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:51:51,655 INFO L87 Difference]: Start difference. First operand 260 states and 553 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:51:54,833 INFO L93 Difference]: Finished difference Result 576 states and 1122 transitions. [2021-08-21 12:51:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-21 12:51:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:51:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:51:54,834 INFO L225 Difference]: With dead ends: 576 [2021-08-21 12:51:54,834 INFO L226 Difference]: Without dead ends: 526 [2021-08-21 12:51:54,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 2907.6ms TimeCoverageRelationStatistics Valid=1394, Invalid=11946, Unknown=0, NotChecked=0, Total=13340 [2021-08-21 12:51:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-08-21 12:51:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 262. [2021-08-21 12:51:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.1340996168582373) internal successors, (557), 261 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 557 transitions. [2021-08-21 12:51:54,838 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 557 transitions. Word has length 39 [2021-08-21 12:51:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:51:54,838 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 557 transitions. [2021-08-21 12:51:54,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:51:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 557 transitions. [2021-08-21 12:51:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:51:54,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:51:54,839 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:51:54,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 12:51:55,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:55,041 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:51:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:51:55,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1775570655, now seen corresponding path program 100 times [2021-08-21 12:51:55,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:51:55,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875378479] [2021-08-21 12:51:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:51:55,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:51:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:51:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:55,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:51:55,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875378479] [2021-08-21 12:51:55,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875378479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:55,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132982574] [2021-08-21 12:51:55,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:51:55,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:51:55,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:51:55,353 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) [2021-08-21 12:51:55,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:51:58,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:51:58,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:51:58,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:51:58,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:51:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:51:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132982574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:51:59,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:51:59,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:51:59,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233895829] [2021-08-21 12:51:59,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:51:59,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:51:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:51:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:51:59,604 INFO L87 Difference]: Start difference. First operand 262 states and 557 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:01,857 INFO L93 Difference]: Finished difference Result 570 states and 1112 transitions. [2021-08-21 12:52:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-21 12:52:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:01,858 INFO L225 Difference]: With dead ends: 570 [2021-08-21 12:52:01,858 INFO L226 Difference]: Without dead ends: 526 [2021-08-21 12:52:01,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 2127.0ms TimeCoverageRelationStatistics Valid=1433, Invalid=10557, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 12:52:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-08-21 12:52:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 264. [2021-08-21 12:52:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.1330798479087454) internal successors, (561), 263 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 561 transitions. [2021-08-21 12:52:01,862 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 561 transitions. Word has length 39 [2021-08-21 12:52:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 561 transitions. [2021-08-21 12:52:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 561 transitions. [2021-08-21 12:52:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:01,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:01,863 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:01,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 12:52:02,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:02,063 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash -679527835, now seen corresponding path program 101 times [2021-08-21 12:52:02,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:02,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97444545] [2021-08-21 12:52:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:02,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:02,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:02,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97444545] [2021-08-21 12:52:02,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97444545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:02,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380994389] [2021-08-21 12:52:02,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:02,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:02,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:02,403 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) [2021-08-21 12:52:02,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:52:06,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:52:06,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:06,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:52:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:06,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380994389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:06,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:06,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:52:06,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106594431] [2021-08-21 12:52:06,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:52:06,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:52:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:06,689 INFO L87 Difference]: Start difference. First operand 264 states and 561 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:09,161 INFO L93 Difference]: Finished difference Result 568 states and 1110 transitions. [2021-08-21 12:52:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-21 12:52:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:09,162 INFO L225 Difference]: With dead ends: 568 [2021-08-21 12:52:09,162 INFO L226 Difference]: Without dead ends: 530 [2021-08-21 12:52:09,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2234.9ms TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-08-21 12:52:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-08-21 12:52:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 266. [2021-08-21 12:52:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.1320754716981134) internal successors, (565), 265 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 565 transitions. [2021-08-21 12:52:09,166 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 565 transitions. Word has length 39 [2021-08-21 12:52:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:09,166 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 565 transitions. [2021-08-21 12:52:09,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 565 transitions. [2021-08-21 12:52:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:09,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:09,166 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:09,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:52:09,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:52:09,367 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash 152896681, now seen corresponding path program 102 times [2021-08-21 12:52:09,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:09,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350852495] [2021-08-21 12:52:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:09,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:09,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:09,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350852495] [2021-08-21 12:52:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350852495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:09,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914232338] [2021-08-21 12:52:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:09,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:09,680 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) [2021-08-21 12:52:09,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:52:13,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:52:13,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:13,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 12:52:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:14,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914232338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:14,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:14,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:52:14,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136099772] [2021-08-21 12:52:14,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:52:14,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:52:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:14,535 INFO L87 Difference]: Start difference. First operand 266 states and 565 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:18,119 INFO L93 Difference]: Finished difference Result 635 states and 1233 transitions. [2021-08-21 12:52:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-21 12:52:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:18,120 INFO L225 Difference]: With dead ends: 635 [2021-08-21 12:52:18,120 INFO L226 Difference]: Without dead ends: 590 [2021-08-21 12:52:18,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4968 ImplicationChecksByTransitivity, 3113.1ms TimeCoverageRelationStatistics Valid=1864, Invalid=14648, Unknown=0, NotChecked=0, Total=16512 [2021-08-21 12:52:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-21 12:52:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 269. [2021-08-21 12:52:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.138059701492537) internal successors, (573), 268 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 573 transitions. [2021-08-21 12:52:18,124 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 573 transitions. Word has length 39 [2021-08-21 12:52:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:18,124 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 573 transitions. [2021-08-21 12:52:18,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 573 transitions. [2021-08-21 12:52:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:18,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:18,125 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:18,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 12:52:18,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:52:18,325 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1112031179, now seen corresponding path program 103 times [2021-08-21 12:52:18,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:18,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793807736] [2021-08-21 12:52:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:18,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:18,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:18,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793807736] [2021-08-21 12:52:18,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793807736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:18,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915049372] [2021-08-21 12:52:18,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:52:18,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:18,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:18,661 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) [2021-08-21 12:52:18,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:52:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:22,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:52:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:23,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915049372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:23,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:23,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:52:23,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878211115] [2021-08-21 12:52:23,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:52:23,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:23,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:52:23,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:23,061 INFO L87 Difference]: Start difference. First operand 269 states and 573 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:25,503 INFO L93 Difference]: Finished difference Result 510 states and 999 transitions. [2021-08-21 12:52:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-21 12:52:25,503 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:25,504 INFO L225 Difference]: With dead ends: 510 [2021-08-21 12:52:25,504 INFO L226 Difference]: Without dead ends: 490 [2021-08-21 12:52:25,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 2156.9ms TimeCoverageRelationStatistics Valid=1578, Invalid=10194, Unknown=0, NotChecked=0, Total=11772 [2021-08-21 12:52:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-21 12:52:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 270. [2021-08-21 12:52:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.137546468401487) internal successors, (575), 269 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 575 transitions. [2021-08-21 12:52:25,507 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 575 transitions. Word has length 39 [2021-08-21 12:52:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:25,507 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 575 transitions. [2021-08-21 12:52:25,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 575 transitions. [2021-08-21 12:52:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:25,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:25,508 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:25,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 12:52:25,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:25,708 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:25,708 INFO L82 PathProgramCache]: Analyzing trace with hash 900986723, now seen corresponding path program 104 times [2021-08-21 12:52:25,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:25,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821608428] [2021-08-21 12:52:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:25,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:26,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:26,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821608428] [2021-08-21 12:52:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821608428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:26,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700095735] [2021-08-21 12:52:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:52:26,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:26,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:26,010 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) [2021-08-21 12:52:26,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:52:29,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:52:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:29,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:52:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:30,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700095735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:30,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:30,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:52:30,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416378084] [2021-08-21 12:52:30,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:52:30,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:52:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:30,494 INFO L87 Difference]: Start difference. First operand 270 states and 575 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:32,340 INFO L93 Difference]: Finished difference Result 568 states and 1114 transitions. [2021-08-21 12:52:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-21 12:52:32,341 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:32,341 INFO L225 Difference]: With dead ends: 568 [2021-08-21 12:52:32,341 INFO L226 Difference]: Without dead ends: 518 [2021-08-21 12:52:32,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 1870.1ms TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 12:52:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-21 12:52:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 276. [2021-08-21 12:52:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1345454545454547) internal successors, (587), 275 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 587 transitions. [2021-08-21 12:52:32,345 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 587 transitions. Word has length 39 [2021-08-21 12:52:32,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:32,345 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 587 transitions. [2021-08-21 12:52:32,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 587 transitions. [2021-08-21 12:52:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:32,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:32,345 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:32,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 12:52:32,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:32,546 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1931149223, now seen corresponding path program 105 times [2021-08-21 12:52:32,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:32,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770705431] [2021-08-21 12:52:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:32,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:32,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:32,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770705431] [2021-08-21 12:52:32,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770705431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:32,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898764687] [2021-08-21 12:52:32,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:52:32,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:32,879 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) [2021-08-21 12:52:32,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:52:36,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:52:36,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:36,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:52:36,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:38,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898764687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:38,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:38,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:52:38,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143413329] [2021-08-21 12:52:38,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:52:38,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:52:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:38,129 INFO L87 Difference]: Start difference. First operand 276 states and 587 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:41,212 INFO L93 Difference]: Finished difference Result 575 states and 1139 transitions. [2021-08-21 12:52:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 12:52:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:41,213 INFO L225 Difference]: With dead ends: 575 [2021-08-21 12:52:41,213 INFO L226 Difference]: Without dead ends: 531 [2021-08-21 12:52:41,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3524 ImplicationChecksByTransitivity, 2956.3ms TimeCoverageRelationStatistics Valid=1308, Invalid=11574, Unknown=0, NotChecked=0, Total=12882 [2021-08-21 12:52:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-08-21 12:52:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 282. [2021-08-21 12:52:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.1459074733096086) internal successors, (603), 281 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 603 transitions. [2021-08-21 12:52:41,216 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 603 transitions. Word has length 39 [2021-08-21 12:52:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:41,216 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 603 transitions. [2021-08-21 12:52:41,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 603 transitions. [2021-08-21 12:52:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:41,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:41,217 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:41,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 12:52:41,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 12:52:41,418 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1267775253, now seen corresponding path program 106 times [2021-08-21 12:52:41,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:41,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889925790] [2021-08-21 12:52:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:41,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:41,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:41,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889925790] [2021-08-21 12:52:41,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889925790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:41,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409965531] [2021-08-21 12:52:41,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:52:41,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:41,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:41,759 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) [2021-08-21 12:52:41,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:52:45,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:52:45,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:45,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:52:45,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:46,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409965531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:46,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:46,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:52:46,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356081525] [2021-08-21 12:52:46,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:52:46,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:52:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:46,342 INFO L87 Difference]: Start difference. First operand 282 states and 603 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:48,529 INFO L93 Difference]: Finished difference Result 581 states and 1161 transitions. [2021-08-21 12:52:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 12:52:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:48,530 INFO L225 Difference]: With dead ends: 581 [2021-08-21 12:52:48,530 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 12:52:48,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3700 ImplicationChecksByTransitivity, 2107.7ms TimeCoverageRelationStatistics Valid=1412, Invalid=10578, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 12:52:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 12:52:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 288. [2021-08-21 12:52:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.156794425087108) internal successors, (619), 287 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 619 transitions. [2021-08-21 12:52:48,534 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 619 transitions. Word has length 39 [2021-08-21 12:52:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:48,534 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 619 transitions. [2021-08-21 12:52:48,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 619 transitions. [2021-08-21 12:52:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:48,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:48,535 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:48,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:52:48,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 12:52:48,735 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -435350737, now seen corresponding path program 107 times [2021-08-21 12:52:48,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:48,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808999276] [2021-08-21 12:52:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:48,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:49,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:49,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808999276] [2021-08-21 12:52:49,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808999276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:49,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35776041] [2021-08-21 12:52:49,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:52:49,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:49,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:49,032 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) [2021-08-21 12:52:49,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:52:53,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:52:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:52:53,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:52:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:52:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:53,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35776041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:53,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:52:53,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:52:53,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505592345] [2021-08-21 12:52:53,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:52:53,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:52:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:52:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:52:53,705 INFO L87 Difference]: Start difference. First operand 288 states and 619 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:52:56,329 INFO L93 Difference]: Finished difference Result 665 states and 1317 transitions. [2021-08-21 12:52:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-21 12:52:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:52:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:52:56,330 INFO L225 Difference]: With dead ends: 665 [2021-08-21 12:52:56,330 INFO L226 Difference]: Without dead ends: 620 [2021-08-21 12:52:56,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3970 ImplicationChecksByTransitivity, 2295.1ms TimeCoverageRelationStatistics Valid=1560, Invalid=11322, Unknown=0, NotChecked=0, Total=12882 [2021-08-21 12:52:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-08-21 12:52:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 292. [2021-08-21 12:52:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.1649484536082473) internal successors, (630), 291 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 630 transitions. [2021-08-21 12:52:56,335 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 630 transitions. Word has length 39 [2021-08-21 12:52:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:52:56,335 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 630 transitions. [2021-08-21 12:52:56,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:52:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 630 transitions. [2021-08-21 12:52:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:52:56,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:52:56,336 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:52:56,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 12:52:56,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:56,536 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:52:56,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:52:56,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1700278597, now seen corresponding path program 108 times [2021-08-21 12:52:56,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:52:56,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660182370] [2021-08-21 12:52:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:52:56,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:52:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:52:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:52:56,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:52:56,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660182370] [2021-08-21 12:52:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660182370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:52:56,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306217201] [2021-08-21 12:52:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:52:56,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:52:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:52:56,835 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) [2021-08-21 12:52:56,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:53:00,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:53:00,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:00,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 12:53:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:01,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306217201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:01,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:01,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:01,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139439608] [2021-08-21 12:53:01,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:01,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:01,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:01,821 INFO L87 Difference]: Start difference. First operand 292 states and 630 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:04,425 INFO L93 Difference]: Finished difference Result 559 states and 1128 transitions. [2021-08-21 12:53:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-21 12:53:04,425 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:53:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:04,426 INFO L225 Difference]: With dead ends: 559 [2021-08-21 12:53:04,426 INFO L226 Difference]: Without dead ends: 539 [2021-08-21 12:53:04,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 2461.0ms TimeCoverageRelationStatistics Valid=1529, Invalid=10681, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 12:53:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-21 12:53:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 278. [2021-08-21 12:53:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.148014440433213) internal successors, (595), 277 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 595 transitions. [2021-08-21 12:53:04,430 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 595 transitions. Word has length 39 [2021-08-21 12:53:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:04,430 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 595 transitions. [2021-08-21 12:53:04,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 595 transitions. [2021-08-21 12:53:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:53:04,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:04,431 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:04,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:04,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:04,631 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1881460323, now seen corresponding path program 109 times [2021-08-21 12:53:04,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:04,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88390637] [2021-08-21 12:53:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:04,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:04,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:04,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88390637] [2021-08-21 12:53:04,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88390637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:04,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027858440] [2021-08-21 12:53:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:53:04,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:04,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:04,937 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) [2021-08-21 12:53:04,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:53:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:09,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:53:09,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:09,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027858440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:09,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:09,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:09,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304759537] [2021-08-21 12:53:09,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:09,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:09,778 INFO L87 Difference]: Start difference. First operand 278 states and 595 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:11,964 INFO L93 Difference]: Finished difference Result 553 states and 1095 transitions. [2021-08-21 12:53:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 12:53:11,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:53:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:11,965 INFO L225 Difference]: With dead ends: 553 [2021-08-21 12:53:11,965 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:53:11,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3449 ImplicationChecksByTransitivity, 2016.8ms TimeCoverageRelationStatistics Valid=1246, Invalid=9884, Unknown=0, NotChecked=0, Total=11130 [2021-08-21 12:53:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:53:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 282. [2021-08-21 12:53:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.1459074733096086) internal successors, (603), 281 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 603 transitions. [2021-08-21 12:53:11,969 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 603 transitions. Word has length 39 [2021-08-21 12:53:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:11,969 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 603 transitions. [2021-08-21 12:53:11,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 603 transitions. [2021-08-21 12:53:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:53:11,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:11,970 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:12,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 12:53:12,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-21 12:53:12,170 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1317464153, now seen corresponding path program 110 times [2021-08-21 12:53:12,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:12,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484583912] [2021-08-21 12:53:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:12,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:12,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:12,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484583912] [2021-08-21 12:53:12,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484583912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:12,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759277751] [2021-08-21 12:53:12,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:53:12,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:12,513 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) [2021-08-21 12:53:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:53:16,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:53:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:16,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:53:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:17,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759277751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:17,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:17,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:17,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968724] [2021-08-21 12:53:17,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:17,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:17,355 INFO L87 Difference]: Start difference. First operand 282 states and 603 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:19,620 INFO L93 Difference]: Finished difference Result 558 states and 1116 transitions. [2021-08-21 12:53:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 12:53:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:53:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:19,621 INFO L225 Difference]: With dead ends: 558 [2021-08-21 12:53:19,621 INFO L226 Difference]: Without dead ends: 520 [2021-08-21 12:53:19,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 2191.2ms TimeCoverageRelationStatistics Valid=1411, Invalid=10799, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 12:53:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-21 12:53:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 288. [2021-08-21 12:53:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.156794425087108) internal successors, (619), 287 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 619 transitions. [2021-08-21 12:53:19,626 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 619 transitions. Word has length 39 [2021-08-21 12:53:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:19,626 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 619 transitions. [2021-08-21 12:53:19,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:19,626 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 619 transitions. [2021-08-21 12:53:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:53:19,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:19,626 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:19,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:19,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 12:53:19,840 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash -485039637, now seen corresponding path program 111 times [2021-08-21 12:53:19,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:19,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165894751] [2021-08-21 12:53:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:19,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:20,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:20,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165894751] [2021-08-21 12:53:20,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165894751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:20,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238483531] [2021-08-21 12:53:20,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:53:20,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:20,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:20,142 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) [2021-08-21 12:53:20,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:53:24,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:53:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:24,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 12:53:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:25,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238483531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:25,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:25,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:25,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680609212] [2021-08-21 12:53:25,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:25,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:25,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:25,698 INFO L87 Difference]: Start difference. First operand 288 states and 619 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:29,353 INFO L93 Difference]: Finished difference Result 646 states and 1280 transitions. [2021-08-21 12:53:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-21 12:53:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:53:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:29,354 INFO L225 Difference]: With dead ends: 646 [2021-08-21 12:53:29,354 INFO L226 Difference]: Without dead ends: 601 [2021-08-21 12:53:29,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4492 ImplicationChecksByTransitivity, 3329.8ms TimeCoverageRelationStatistics Valid=1626, Invalid=14124, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 12:53:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-21 12:53:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 292. [2021-08-21 12:53:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.1649484536082473) internal successors, (630), 291 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 630 transitions. [2021-08-21 12:53:29,359 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 630 transitions. Word has length 39 [2021-08-21 12:53:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:29,359 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 630 transitions. [2021-08-21 12:53:29,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 630 transitions. [2021-08-21 12:53:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:53:29,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:29,359 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:29,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 12:53:29,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:53:29,560 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1749967497, now seen corresponding path program 112 times [2021-08-21 12:53:29,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:29,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741667274] [2021-08-21 12:53:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:29,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:29,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:29,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741667274] [2021-08-21 12:53:29,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741667274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:29,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462723552] [2021-08-21 12:53:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:53:29,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:29,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:29,868 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) [2021-08-21 12:53:29,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:53:34,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:53:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:34,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:53:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:34,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462723552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:34,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:34,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:34,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117112156] [2021-08-21 12:53:34,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:34,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:34,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:34,861 INFO L87 Difference]: Start difference. First operand 292 states and 630 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:36,994 INFO L93 Difference]: Finished difference Result 533 states and 1076 transitions. [2021-08-21 12:53:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 12:53:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:53:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:36,995 INFO L225 Difference]: With dead ends: 533 [2021-08-21 12:53:36,995 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 12:53:36,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 2081.2ms TimeCoverageRelationStatistics Valid=1478, Invalid=9652, Unknown=0, NotChecked=0, Total=11130 [2021-08-21 12:53:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 12:53:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 276. [2021-08-21 12:53:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1345454545454547) internal successors, (587), 275 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 587 transitions. [2021-08-21 12:53:36,999 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 587 transitions. Word has length 39 [2021-08-21 12:53:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:37,000 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 587 transitions. [2021-08-21 12:53:37,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 587 transitions. [2021-08-21 12:53:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:53:37,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:37,000 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:37,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 12:53:37,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 12:53:37,201 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1860134243, now seen corresponding path program 113 times [2021-08-21 12:53:37,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:37,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314417271] [2021-08-21 12:53:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:37,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:37,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:37,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314417271] [2021-08-21 12:53:37,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314417271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:37,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407384054] [2021-08-21 12:53:37,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:53:37,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:37,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:37,509 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) [2021-08-21 12:53:37,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:53:41,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:53:41,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:41,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:53:41,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:42,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407384054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:42,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:42,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:42,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133665052] [2021-08-21 12:53:42,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:42,551 INFO L87 Difference]: Start difference. First operand 276 states and 587 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:44,726 INFO L93 Difference]: Finished difference Result 518 states and 1023 transitions. [2021-08-21 12:53:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 12:53:44,727 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:53:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:44,727 INFO L225 Difference]: With dead ends: 518 [2021-08-21 12:53:44,727 INFO L226 Difference]: Without dead ends: 480 [2021-08-21 12:53:44,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2164.5ms TimeCoverageRelationStatistics Valid=1385, Invalid=11047, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 12:53:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-08-21 12:53:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 280. [2021-08-21 12:53:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.132616487455197) internal successors, (595), 279 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 595 transitions. [2021-08-21 12:53:44,731 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 595 transitions. Word has length 39 [2021-08-21 12:53:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:44,731 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 595 transitions. [2021-08-21 12:53:44,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 595 transitions. [2021-08-21 12:53:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:53:44,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:44,732 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:44,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 12:53:44,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:44,932 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:44,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1602408537, now seen corresponding path program 114 times [2021-08-21 12:53:44,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:44,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901224977] [2021-08-21 12:53:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:44,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:45,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:45,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901224977] [2021-08-21 12:53:45,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901224977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:45,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887286858] [2021-08-21 12:53:45,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:53:45,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:45,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:45,231 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) [2021-08-21 12:53:45,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:53:49,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:53:49,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:53:49,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 12:53:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:50,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887286858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:50,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:50,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:50,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786947627] [2021-08-21 12:53:50,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:50,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:50,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:50,619 INFO L87 Difference]: Start difference. First operand 280 states and 595 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:53:53,671 INFO L93 Difference]: Finished difference Result 630 states and 1233 transitions. [2021-08-21 12:53:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-21 12:53:53,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:53:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:53:53,672 INFO L225 Difference]: With dead ends: 630 [2021-08-21 12:53:53,672 INFO L226 Difference]: Without dead ends: 585 [2021-08-21 12:53:53,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 2695.4ms TimeCoverageRelationStatistics Valid=1580, Invalid=12700, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 12:53:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-21 12:53:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 285. [2021-08-21 12:53:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.137323943661972) internal successors, (607), 284 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 607 transitions. [2021-08-21 12:53:53,675 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 607 transitions. Word has length 39 [2021-08-21 12:53:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:53:53,676 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 607 transitions. [2021-08-21 12:53:53,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:53:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 607 transitions. [2021-08-21 12:53:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:53:53,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:53:53,676 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:53:53,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:53:53,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:53,877 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:53:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:53:53,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1427630899, now seen corresponding path program 115 times [2021-08-21 12:53:53,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:53:53,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196894290] [2021-08-21 12:53:53,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:53:53,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:53:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:54,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:53:54,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196894290] [2021-08-21 12:53:54,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196894290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:54,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208938984] [2021-08-21 12:53:54,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:53:54,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:53:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:53:54,213 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) [2021-08-21 12:53:54,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:53:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:53:58,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:53:58,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:53:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:53:59,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208938984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:53:59,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:53:59,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:53:59,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142884347] [2021-08-21 12:53:59,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:53:59,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:53:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:53:59,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:53:59,338 INFO L87 Difference]: Start difference. First operand 285 states and 607 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:01,560 INFO L93 Difference]: Finished difference Result 505 states and 1009 transitions. [2021-08-21 12:54:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 12:54:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:54:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:01,561 INFO L225 Difference]: With dead ends: 505 [2021-08-21 12:54:01,561 INFO L226 Difference]: Without dead ends: 485 [2021-08-21 12:54:01,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3524 ImplicationChecksByTransitivity, 2116.1ms TimeCoverageRelationStatistics Valid=1477, Invalid=9865, Unknown=0, NotChecked=0, Total=11342 [2021-08-21 12:54:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-21 12:54:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 273. [2021-08-21 12:54:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.110294117647059) internal successors, (574), 272 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 574 transitions. [2021-08-21 12:54:01,565 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 574 transitions. Word has length 39 [2021-08-21 12:54:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:01,565 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 574 transitions. [2021-08-21 12:54:01,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 574 transitions. [2021-08-21 12:54:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:54:01,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:01,565 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:01,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 12:54:01,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 12:54:01,766 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:01,766 INFO L82 PathProgramCache]: Analyzing trace with hash -303138833, now seen corresponding path program 116 times [2021-08-21 12:54:01,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:01,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64495209] [2021-08-21 12:54:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:01,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:02,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:02,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64495209] [2021-08-21 12:54:02,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64495209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:02,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166725005] [2021-08-21 12:54:02,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:54:02,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:02,057 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) [2021-08-21 12:54:02,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:54:06,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:54:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:06,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 12:54:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:07,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166725005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:07,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:07,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-21 12:54:07,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937480570] [2021-08-21 12:54:07,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 12:54:07,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 12:54:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:54:07,263 INFO L87 Difference]: Start difference. First operand 273 states and 574 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:09,759 INFO L93 Difference]: Finished difference Result 603 states and 1211 transitions. [2021-08-21 12:54:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-21 12:54:09,759 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:54:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:09,760 INFO L225 Difference]: With dead ends: 603 [2021-08-21 12:54:09,760 INFO L226 Difference]: Without dead ends: 546 [2021-08-21 12:54:09,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3982 ImplicationChecksByTransitivity, 2280.0ms TimeCoverageRelationStatistics Valid=1575, Invalid=10857, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 12:54:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-21 12:54:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 280. [2021-08-21 12:54:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.1039426523297493) internal successors, (587), 279 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 587 transitions. [2021-08-21 12:54:09,764 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 587 transitions. Word has length 39 [2021-08-21 12:54:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:09,764 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 587 transitions. [2021-08-21 12:54:09,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 587 transitions. [2021-08-21 12:54:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:54:09,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:09,765 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:09,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:54:09,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:09,965 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:09,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1731468445, now seen corresponding path program 117 times [2021-08-21 12:54:09,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:09,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60581202] [2021-08-21 12:54:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:09,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:54:10,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:10,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60581202] [2021-08-21 12:54:10,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60581202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:10,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834997609] [2021-08-21 12:54:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:54:10,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:10,239 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) [2021-08-21 12:54:10,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:54:14,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:54:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:14,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-21 12:54:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:15,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834997609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:15,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:15,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-08-21 12:54:15,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982062168] [2021-08-21 12:54:15,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 12:54:15,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 12:54:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:54:15,562 INFO L87 Difference]: Start difference. First operand 280 states and 587 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:18,497 INFO L93 Difference]: Finished difference Result 612 states and 1231 transitions. [2021-08-21 12:54:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-21 12:54:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:54:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:18,498 INFO L225 Difference]: With dead ends: 612 [2021-08-21 12:54:18,498 INFO L226 Difference]: Without dead ends: 565 [2021-08-21 12:54:18,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5060 ImplicationChecksByTransitivity, 2780.4ms TimeCoverageRelationStatistics Valid=1766, Invalid=13240, Unknown=0, NotChecked=0, Total=15006 [2021-08-21 12:54:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-21 12:54:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 271. [2021-08-21 12:54:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.0481481481481483) internal successors, (553), 270 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 553 transitions. [2021-08-21 12:54:18,502 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 553 transitions. Word has length 39 [2021-08-21 12:54:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:18,502 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 553 transitions. [2021-08-21 12:54:18,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 553 transitions. [2021-08-21 12:54:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:54:18,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:18,503 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:18,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:18,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:18,703 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash 157223521, now seen corresponding path program 118 times [2021-08-21 12:54:18,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:18,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044517079] [2021-08-21 12:54:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:18,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:54:18,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:18,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044517079] [2021-08-21 12:54:18,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044517079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:18,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986583843] [2021-08-21 12:54:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:54:18,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:18,814 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) [2021-08-21 12:54:18,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:54:23,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:54:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 12:54:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:54:23,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986583843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:23,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:23,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:54:23,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024765162] [2021-08-21 12:54:23,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:54:23,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:54:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:54:23,584 INFO L87 Difference]: Start difference. First operand 271 states and 553 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-08-21 12:54:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:23,688 INFO L93 Difference]: Finished difference Result 425 states and 854 transitions. [2021-08-21 12:54:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:54:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 41 [2021-08-21 12:54:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:23,689 INFO L225 Difference]: With dead ends: 425 [2021-08-21 12:54:23,689 INFO L226 Difference]: Without dead ends: 368 [2021-08-21 12:54:23,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:54:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-21 12:54:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 291. [2021-08-21 12:54:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-08-21 12:54:23,692 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 41 [2021-08-21 12:54:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:23,692 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-08-21 12:54:23,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-08-21 12:54:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-08-21 12:54:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:54:23,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:23,692 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:23,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 12:54:23,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-21 12:54:23,893 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1297665369, now seen corresponding path program 119 times [2021-08-21 12:54:23,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:23,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592817112] [2021-08-21 12:54:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:23,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:54:24,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:24,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592817112] [2021-08-21 12:54:24,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592817112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:24,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198649510] [2021-08-21 12:54:24,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:54:24,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:24,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:24,316 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) [2021-08-21 12:54:24,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:54:28,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:54:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:28,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:54:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:29,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198649510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:29,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:29,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-21 12:54:29,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058894835] [2021-08-21 12:54:29,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 12:54:29,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 12:54:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:54:29,819 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:31,683 INFO L93 Difference]: Finished difference Result 440 states and 873 transitions. [2021-08-21 12:54:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 12:54:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2021-08-21 12:54:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:31,684 INFO L225 Difference]: With dead ends: 440 [2021-08-21 12:54:31,684 INFO L226 Difference]: Without dead ends: 411 [2021-08-21 12:54:31,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 1780.9ms TimeCoverageRelationStatistics Valid=536, Invalid=6946, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 12:54:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-08-21 12:54:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 224. [2021-08-21 12:54:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0493273542600896) internal successors, (457), 223 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 457 transitions. [2021-08-21 12:54:31,687 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 457 transitions. Word has length 41 [2021-08-21 12:54:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 457 transitions. [2021-08-21 12:54:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 457 transitions. [2021-08-21 12:54:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:31,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:31,688 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:31,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:31,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:31,901 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 217373005, now seen corresponding path program 120 times [2021-08-21 12:54:31,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:31,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433769704] [2021-08-21 12:54:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:31,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:32,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:32,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433769704] [2021-08-21 12:54:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433769704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:32,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828396887] [2021-08-21 12:54:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:54:32,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:32,272 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) [2021-08-21 12:54:32,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:54:36,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:54:36,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:36,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:54:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:37,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828396887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:37,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:37,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:54:37,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239102362] [2021-08-21 12:54:37,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:54:37,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:54:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:54:37,686 INFO L87 Difference]: Start difference. First operand 224 states and 457 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:54:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:39,707 INFO L93 Difference]: Finished difference Result 627 states and 1236 transitions. [2021-08-21 12:54:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-21 12:54:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:54:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:39,708 INFO L225 Difference]: With dead ends: 627 [2021-08-21 12:54:39,708 INFO L226 Difference]: Without dead ends: 554 [2021-08-21 12:54:39,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3194 ImplicationChecksByTransitivity, 2092.8ms TimeCoverageRelationStatistics Valid=1368, Invalid=9552, Unknown=0, NotChecked=0, Total=10920 [2021-08-21 12:54:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-08-21 12:54:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 298. [2021-08-21 12:54:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.1515151515151514) internal successors, (639), 297 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 639 transitions. [2021-08-21 12:54:39,712 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 639 transitions. Word has length 43 [2021-08-21 12:54:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:39,712 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 639 transitions. [2021-08-21 12:54:39,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:54:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 639 transitions. [2021-08-21 12:54:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:39,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:39,713 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:39,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 12:54:39,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:39,913 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash 339376597, now seen corresponding path program 121 times [2021-08-21 12:54:39,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:39,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305656163] [2021-08-21 12:54:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:39,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:40,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:40,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305656163] [2021-08-21 12:54:40,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305656163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:40,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428037085] [2021-08-21 12:54:40,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:54:40,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:40,241 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) [2021-08-21 12:54:40,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:54:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:44,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:54:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:45,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428037085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:45,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:45,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:54:45,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757482172] [2021-08-21 12:54:45,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:54:45,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:54:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:54:45,766 INFO L87 Difference]: Start difference. First operand 298 states and 639 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:54:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:47,942 INFO L93 Difference]: Finished difference Result 665 states and 1299 transitions. [2021-08-21 12:54:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-21 12:54:47,942 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:54:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:47,943 INFO L225 Difference]: With dead ends: 665 [2021-08-21 12:54:47,943 INFO L226 Difference]: Without dead ends: 603 [2021-08-21 12:54:47,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 2175.7ms TimeCoverageRelationStatistics Valid=1452, Invalid=10538, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 12:54:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-08-21 12:54:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 300. [2021-08-21 12:54:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.150501672240803) internal successors, (643), 299 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 643 transitions. [2021-08-21 12:54:47,948 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 643 transitions. Word has length 43 [2021-08-21 12:54:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:47,948 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 643 transitions. [2021-08-21 12:54:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:54:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 643 transitions. [2021-08-21 12:54:47,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:47,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:47,948 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:47,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 12:54:48,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:54:48,149 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1164197863, now seen corresponding path program 122 times [2021-08-21 12:54:48,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:48,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063534923] [2021-08-21 12:54:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:48,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:48,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:48,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063534923] [2021-08-21 12:54:48,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063534923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:48,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625570940] [2021-08-21 12:54:48,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:54:48,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:48,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:48,474 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) [2021-08-21 12:54:48,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:54:53,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:54:53,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:54:53,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:54:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:54:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:54,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625570940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:54,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:54:54,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:54:54,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120245189] [2021-08-21 12:54:54,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:54:54,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:54:54,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:54:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:54:54,009 INFO L87 Difference]: Start difference. First operand 300 states and 643 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:54:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:54:56,440 INFO L93 Difference]: Finished difference Result 663 states and 1297 transitions. [2021-08-21 12:54:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-21 12:54:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:54:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:54:56,441 INFO L225 Difference]: With dead ends: 663 [2021-08-21 12:54:56,441 INFO L226 Difference]: Without dead ends: 607 [2021-08-21 12:54:56,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3974 ImplicationChecksByTransitivity, 2284.0ms TimeCoverageRelationStatistics Valid=1549, Invalid=11561, Unknown=0, NotChecked=0, Total=13110 [2021-08-21 12:54:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-08-21 12:54:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 302. [2021-08-21 12:54:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.1495016611295683) internal successors, (647), 301 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:54:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 647 transitions. [2021-08-21 12:54:56,446 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 647 transitions. Word has length 43 [2021-08-21 12:54:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:54:56,446 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 647 transitions. [2021-08-21 12:54:56,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:54:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 647 transitions. [2021-08-21 12:54:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:54:56,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:54:56,446 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:54:56,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:54:56,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:56,647 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:54:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:54:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash 979486557, now seen corresponding path program 123 times [2021-08-21 12:54:56,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:54:56,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996464259] [2021-08-21 12:54:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:54:56,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:54:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:54:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:54:56,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:54:56,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996464259] [2021-08-21 12:54:56,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996464259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:54:56,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249924747] [2021-08-21 12:54:56,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:54:56,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:54:56,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:54:56,973 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) [2021-08-21 12:54:56,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:55:01,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:55:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:01,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:55:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249924747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:02,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:55:02,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592812445] [2021-08-21 12:55:02,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:55:02,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:55:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:55:02,558 INFO L87 Difference]: Start difference. First operand 302 states and 647 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:05,068 INFO L93 Difference]: Finished difference Result 661 states and 1295 transitions. [2021-08-21 12:55:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-21 12:55:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:55:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:05,069 INFO L225 Difference]: With dead ends: 661 [2021-08-21 12:55:05,069 INFO L226 Difference]: Without dead ends: 611 [2021-08-21 12:55:05,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4381 ImplicationChecksByTransitivity, 2408.9ms TimeCoverageRelationStatistics Valid=1671, Invalid=12609, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 12:55:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-08-21 12:55:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 304. [2021-08-21 12:55:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.1485148514851486) internal successors, (651), 303 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 651 transitions. [2021-08-21 12:55:05,074 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 651 transitions. Word has length 43 [2021-08-21 12:55:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:05,074 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 651 transitions. [2021-08-21 12:55:05,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 651 transitions. [2021-08-21 12:55:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:05,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:05,075 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:05,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 12:55:05,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 12:55:05,275 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2009649057, now seen corresponding path program 124 times [2021-08-21 12:55:05,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:05,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233823392] [2021-08-21 12:55:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:05,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:05,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233823392] [2021-08-21 12:55:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233823392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811272353] [2021-08-21 12:55:05,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:55:05,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:05,613 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) [2021-08-21 12:55:05,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:55:10,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:55:10,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:10,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:55:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:11,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811272353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:11,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:11,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:55:11,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883358315] [2021-08-21 12:55:11,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:55:11,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:55:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:55:11,296 INFO L87 Difference]: Start difference. First operand 304 states and 651 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:14,017 INFO L93 Difference]: Finished difference Result 659 states and 1293 transitions. [2021-08-21 12:55:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-21 12:55:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:55:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:14,018 INFO L225 Difference]: With dead ends: 659 [2021-08-21 12:55:14,019 INFO L226 Difference]: Without dead ends: 615 [2021-08-21 12:55:14,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4804 ImplicationChecksByTransitivity, 2525.8ms TimeCoverageRelationStatistics Valid=1818, Invalid=13682, Unknown=0, NotChecked=0, Total=15500 [2021-08-21 12:55:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-21 12:55:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 306. [2021-08-21 12:55:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1475409836065573) internal successors, (655), 305 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 655 transitions. [2021-08-21 12:55:14,024 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 655 transitions. Word has length 43 [2021-08-21 12:55:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:14,024 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 655 transitions. [2021-08-21 12:55:14,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 655 transitions. [2021-08-21 12:55:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:14,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:14,024 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:14,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 12:55:14,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 12:55:14,225 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1189275419, now seen corresponding path program 125 times [2021-08-21 12:55:14,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:14,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212884018] [2021-08-21 12:55:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:14,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:14,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:14,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212884018] [2021-08-21 12:55:14,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212884018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:14,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300381384] [2021-08-21 12:55:14,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:55:14,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:14,556 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) [2021-08-21 12:55:14,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:55:19,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:55:19,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:19,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:55:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:20,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300381384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:20,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:20,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:55:20,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559443262] [2021-08-21 12:55:20,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:55:20,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:55:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:55:20,326 INFO L87 Difference]: Start difference. First operand 306 states and 655 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:23,212 INFO L93 Difference]: Finished difference Result 657 states and 1291 transitions. [2021-08-21 12:55:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-21 12:55:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:55:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:23,213 INFO L225 Difference]: With dead ends: 657 [2021-08-21 12:55:23,213 INFO L226 Difference]: Without dead ends: 619 [2021-08-21 12:55:23,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5243 ImplicationChecksByTransitivity, 2640.1ms TimeCoverageRelationStatistics Valid=1990, Invalid=14780, Unknown=0, NotChecked=0, Total=16770 [2021-08-21 12:55:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-21 12:55:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 308. [2021-08-21 12:55:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.1465798045602607) internal successors, (659), 307 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 659 transitions. [2021-08-21 12:55:23,218 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 659 transitions. Word has length 43 [2021-08-21 12:55:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:23,218 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 659 transitions. [2021-08-21 12:55:23,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 659 transitions. [2021-08-21 12:55:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:23,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:23,219 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:23,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:23,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 12:55:23,421 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:23,422 INFO L82 PathProgramCache]: Analyzing trace with hash -356850903, now seen corresponding path program 126 times [2021-08-21 12:55:23,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:23,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653446066] [2021-08-21 12:55:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:23,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:23,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:23,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653446066] [2021-08-21 12:55:23,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653446066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:23,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307792846] [2021-08-21 12:55:23,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:55:23,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:23,770 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) [2021-08-21 12:55:23,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:55:28,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:55:28,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:28,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:55:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:29,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307792846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:29,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:29,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:55:29,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852694250] [2021-08-21 12:55:29,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:55:29,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:55:29,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:55:29,632 INFO L87 Difference]: Start difference. First operand 308 states and 659 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:32,775 INFO L93 Difference]: Finished difference Result 720 states and 1404 transitions. [2021-08-21 12:55:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-08-21 12:55:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:55:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:32,776 INFO L225 Difference]: With dead ends: 720 [2021-08-21 12:55:32,776 INFO L226 Difference]: Without dead ends: 675 [2021-08-21 12:55:32,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5557 ImplicationChecksByTransitivity, 2878.4ms TimeCoverageRelationStatistics Valid=2162, Invalid=15660, Unknown=0, NotChecked=0, Total=17822 [2021-08-21 12:55:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-08-21 12:55:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 311. [2021-08-21 12:55:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.1516129032258067) internal successors, (667), 310 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 667 transitions. [2021-08-21 12:55:32,782 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 667 transitions. Word has length 43 [2021-08-21 12:55:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:32,782 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 667 transitions. [2021-08-21 12:55:32,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 667 transitions. [2021-08-21 12:55:32,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:32,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:32,782 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:32,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:33,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:33,005 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:33,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1621778763, now seen corresponding path program 127 times [2021-08-21 12:55:33,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:33,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539043669] [2021-08-21 12:55:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:33,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:33,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:33,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539043669] [2021-08-21 12:55:33,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539043669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:33,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544287502] [2021-08-21 12:55:33,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:55:33,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:33,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:33,365 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) [2021-08-21 12:55:33,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:55:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:38,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:55:38,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:39,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544287502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:39,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:39,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:55:39,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64315403] [2021-08-21 12:55:39,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:55:39,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:39,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:55:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:55:39,247 INFO L87 Difference]: Start difference. First operand 311 states and 667 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:42,115 INFO L93 Difference]: Finished difference Result 587 states and 1155 transitions. [2021-08-21 12:55:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 12:55:42,115 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:55:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:42,116 INFO L225 Difference]: With dead ends: 587 [2021-08-21 12:55:42,116 INFO L226 Difference]: Without dead ends: 567 [2021-08-21 12:55:42,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4576 ImplicationChecksByTransitivity, 2596.6ms TimeCoverageRelationStatistics Valid=1984, Invalid=13022, Unknown=0, NotChecked=0, Total=15006 [2021-08-21 12:55:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-21 12:55:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 312. [2021-08-21 12:55:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.1511254019292605) internal successors, (669), 311 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) [2021-08-21 12:55:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 669 transitions. [2021-08-21 12:55:42,120 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 669 transitions. Word has length 43 [2021-08-21 12:55:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:42,121 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 669 transitions. [2021-08-21 12:55:42,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 669 transitions. [2021-08-21 12:55:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:42,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:42,121 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:42,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:42,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:42,322 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash 465716511, now seen corresponding path program 128 times [2021-08-21 12:55:42,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:42,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293622406] [2021-08-21 12:55:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:42,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:42,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:42,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293622406] [2021-08-21 12:55:42,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293622406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:42,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269162806] [2021-08-21 12:55:42,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:55:42,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:42,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:42,648 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) [2021-08-21 12:55:42,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:55:47,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:55:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:47,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:55:47,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:48,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269162806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:48,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:48,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:55:48,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541732319] [2021-08-21 12:55:48,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:55:48,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:55:48,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:55:48,585 INFO L87 Difference]: Start difference. First operand 312 states and 669 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:55:50,870 INFO L93 Difference]: Finished difference Result 664 states and 1306 transitions. [2021-08-21 12:55:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-21 12:55:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:55:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:55:50,871 INFO L225 Difference]: With dead ends: 664 [2021-08-21 12:55:50,871 INFO L226 Difference]: Without dead ends: 608 [2021-08-21 12:55:50,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3631 ImplicationChecksByTransitivity, 2139.7ms TimeCoverageRelationStatistics Valid=1359, Invalid=10631, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 12:55:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-21 12:55:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 318. [2021-08-21 12:55:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.1482649842271293) internal successors, (681), 317 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:55:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 681 transitions. [2021-08-21 12:55:50,875 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 681 transitions. Word has length 43 [2021-08-21 12:55:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:55:50,875 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 681 transitions. [2021-08-21 12:55:50,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:55:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 681 transitions. [2021-08-21 12:55:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:55:50,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:55:50,875 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:55:50,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 12:55:51,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 12:55:51,076 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:55:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:55:51,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1685566365, now seen corresponding path program 129 times [2021-08-21 12:55:51,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:55:51,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518699092] [2021-08-21 12:55:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:55:51,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:55:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:55:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:51,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:55:51,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518699092] [2021-08-21 12:55:51,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518699092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:51,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226809339] [2021-08-21 12:55:51,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:55:51,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:55:51,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:55:51,435 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) [2021-08-21 12:55:51,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:55:56,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:55:56,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:55:56,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 12:55:56,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:55:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:55:58,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226809339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:55:58,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:55:58,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:55:58,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182144931] [2021-08-21 12:55:58,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:55:58,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:55:58,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:55:58,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:55:58,067 INFO L87 Difference]: Start difference. First operand 318 states and 681 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:01,195 INFO L93 Difference]: Finished difference Result 671 states and 1331 transitions. [2021-08-21 12:56:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-21 12:56:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:56:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:01,196 INFO L225 Difference]: With dead ends: 671 [2021-08-21 12:56:01,196 INFO L226 Difference]: Without dead ends: 621 [2021-08-21 12:56:01,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3901 ImplicationChecksByTransitivity, 2996.5ms TimeCoverageRelationStatistics Valid=1517, Invalid=12525, Unknown=0, NotChecked=0, Total=14042 [2021-08-21 12:56:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-21 12:56:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-08-21 12:56:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1578947368421053) internal successors, (697), 323 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 697 transitions. [2021-08-21 12:56:01,201 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 697 transitions. Word has length 43 [2021-08-21 12:56:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:01,201 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 697 transitions. [2021-08-21 12:56:01,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 697 transitions. [2021-08-21 12:56:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:01,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:01,201 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:01,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 12:56:01,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2021-08-21 12:56:01,402 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash -655403865, now seen corresponding path program 130 times [2021-08-21 12:56:01,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:01,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543080357] [2021-08-21 12:56:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:01,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:01,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:01,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543080357] [2021-08-21 12:56:01,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543080357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:01,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108015596] [2021-08-21 12:56:01,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:56:01,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:01,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:01,735 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) [2021-08-21 12:56:01,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:56:06,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:56:06,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:06,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:56:06,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:07,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108015596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:07,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:07,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:56:07,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2626668] [2021-08-21 12:56:07,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:56:07,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:56:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:56:07,777 INFO L87 Difference]: Start difference. First operand 324 states and 697 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:10,245 INFO L93 Difference]: Finished difference Result 677 states and 1353 transitions. [2021-08-21 12:56:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-21 12:56:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:56:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:10,246 INFO L225 Difference]: With dead ends: 677 [2021-08-21 12:56:10,246 INFO L226 Difference]: Without dead ends: 633 [2021-08-21 12:56:10,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4414 ImplicationChecksByTransitivity, 2377.9ms TimeCoverageRelationStatistics Valid=1637, Invalid=12643, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 12:56:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-08-21 12:56:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 330. [2021-08-21 12:56:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.1671732522796354) internal successors, (713), 329 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 713 transitions. [2021-08-21 12:56:10,251 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 713 transitions. Word has length 43 [2021-08-21 12:56:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:10,251 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 713 transitions. [2021-08-21 12:56:10,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 713 transitions. [2021-08-21 12:56:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:10,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:10,251 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:10,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 12:56:10,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:10,452 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash 440638955, now seen corresponding path program 131 times [2021-08-21 12:56:10,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:10,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598079084] [2021-08-21 12:56:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:10,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:10,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:10,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598079084] [2021-08-21 12:56:10,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598079084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:10,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956991648] [2021-08-21 12:56:10,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:56:10,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:10,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:10,778 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) [2021-08-21 12:56:10,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:56:16,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:56:16,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:16,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:56:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:16,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956991648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:16,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:16,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:56:16,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157878969] [2021-08-21 12:56:16,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:56:16,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:56:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:56:16,863 INFO L87 Difference]: Start difference. First operand 330 states and 713 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:19,608 INFO L93 Difference]: Finished difference Result 685 states and 1379 transitions. [2021-08-21 12:56:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 12:56:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:56:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:19,609 INFO L225 Difference]: With dead ends: 685 [2021-08-21 12:56:19,609 INFO L226 Difference]: Without dead ends: 647 [2021-08-21 12:56:19,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4828 ImplicationChecksByTransitivity, 2483.4ms TimeCoverageRelationStatistics Valid=1809, Invalid=13691, Unknown=0, NotChecked=0, Total=15500 [2021-08-21 12:56:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-08-21 12:56:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 336. [2021-08-21 12:56:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.1761194029850746) internal successors, (729), 335 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 729 transitions. [2021-08-21 12:56:19,614 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 729 transitions. Word has length 43 [2021-08-21 12:56:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:19,614 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 729 transitions. [2021-08-21 12:56:19,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 729 transitions. [2021-08-21 12:56:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:19,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:19,615 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:19,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 12:56:19,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:19,818 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1273063471, now seen corresponding path program 132 times [2021-08-21 12:56:19,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:19,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382350906] [2021-08-21 12:56:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:19,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:20,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:20,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382350906] [2021-08-21 12:56:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382350906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:20,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244854536] [2021-08-21 12:56:20,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:56:20,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:20,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:20,173 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) [2021-08-21 12:56:20,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:56:25,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:56:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:25,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:56:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:26,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244854536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:26,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:26,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:56:26,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663135198] [2021-08-21 12:56:26,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:56:26,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:26,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:56:26,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:56:26,305 INFO L87 Difference]: Start difference. First operand 336 states and 729 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:29,273 INFO L93 Difference]: Finished difference Result 781 states and 1555 transitions. [2021-08-21 12:56:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-08-21 12:56:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:56:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:29,274 INFO L225 Difference]: With dead ends: 781 [2021-08-21 12:56:29,274 INFO L226 Difference]: Without dead ends: 736 [2021-08-21 12:56:29,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5124 ImplicationChecksByTransitivity, 2692.2ms TimeCoverageRelationStatistics Valid=1984, Invalid=14528, Unknown=0, NotChecked=0, Total=16512 [2021-08-21 12:56:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-08-21 12:56:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 340. [2021-08-21 12:56:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.1828908554572273) internal successors, (740), 339 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 740 transitions. [2021-08-21 12:56:29,279 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 740 transitions. Word has length 43 [2021-08-21 12:56:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:29,279 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 740 transitions. [2021-08-21 12:56:29,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 740 transitions. [2021-08-21 12:56:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:29,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:29,279 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:29,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 12:56:29,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 12:56:29,480 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 8135611, now seen corresponding path program 133 times [2021-08-21 12:56:29,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:29,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939303767] [2021-08-21 12:56:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:29,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:29,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:29,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939303767] [2021-08-21 12:56:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939303767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:29,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730672221] [2021-08-21 12:56:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:56:29,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:29,823 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) [2021-08-21 12:56:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:56:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:35,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:56:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:35,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730672221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:35,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:35,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:56:35,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478297365] [2021-08-21 12:56:35,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:56:35,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:35,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:56:35,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1574, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:56:35,972 INFO L87 Difference]: Start difference. First operand 340 states and 740 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:38,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:38,580 INFO L93 Difference]: Finished difference Result 650 states and 1319 transitions. [2021-08-21 12:56:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-21 12:56:38,581 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:56:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:38,581 INFO L225 Difference]: With dead ends: 650 [2021-08-21 12:56:38,581 INFO L226 Difference]: Without dead ends: 630 [2021-08-21 12:56:38,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 2439.8ms TimeCoverageRelationStatistics Valid=1865, Invalid=12177, Unknown=0, NotChecked=0, Total=14042 [2021-08-21 12:56:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-08-21 12:56:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 322. [2021-08-21 12:56:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.1651090342679127) internal successors, (695), 321 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 695 transitions. [2021-08-21 12:56:38,586 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 695 transitions. Word has length 43 [2021-08-21 12:56:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:38,586 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 695 transitions. [2021-08-21 12:56:38,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 695 transitions. [2021-08-21 12:56:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:38,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:38,587 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:38,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 12:56:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:56:38,787 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:38,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash 2103008287, now seen corresponding path program 134 times [2021-08-21 12:56:38,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:38,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977926557] [2021-08-21 12:56:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:38,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:39,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:39,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977926557] [2021-08-21 12:56:39,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977926557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:39,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070318159] [2021-08-21 12:56:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:56:39,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:39,109 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) [2021-08-21 12:56:39,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:56:44,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:56:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:44,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:56:44,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:45,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070318159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:45,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:45,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:56:45,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984710326] [2021-08-21 12:56:45,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:56:45,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:56:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:56:45,288 INFO L87 Difference]: Start difference. First operand 322 states and 695 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:47,628 INFO L93 Difference]: Finished difference Result 651 states and 1293 transitions. [2021-08-21 12:56:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-21 12:56:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:56:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:47,629 INFO L225 Difference]: With dead ends: 651 [2021-08-21 12:56:47,629 INFO L226 Difference]: Without dead ends: 601 [2021-08-21 12:56:47,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4136 ImplicationChecksByTransitivity, 2254.6ms TimeCoverageRelationStatistics Valid=1473, Invalid=11867, Unknown=0, NotChecked=0, Total=13340 [2021-08-21 12:56:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-21 12:56:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 326. [2021-08-21 12:56:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.163076923076923) internal successors, (703), 325 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 703 transitions. [2021-08-21 12:56:47,633 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 703 transitions. Word has length 43 [2021-08-21 12:56:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:47,633 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 703 transitions. [2021-08-21 12:56:47,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 703 transitions. [2021-08-21 12:56:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:47,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:47,634 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:47,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 12:56:47,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:56:47,834 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1161796509, now seen corresponding path program 135 times [2021-08-21 12:56:47,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:47,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343691464] [2021-08-21 12:56:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:47,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:48,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:48,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343691464] [2021-08-21 12:56:48,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343691464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:48,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303261611] [2021-08-21 12:56:48,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:56:48,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:48,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:48,156 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) [2021-08-21 12:56:48,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:56:53,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:56:53,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:56:53,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:56:53,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:56:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:54,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303261611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:54,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:56:54,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:56:54,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780160787] [2021-08-21 12:56:54,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:56:54,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:56:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:56:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:56:54,427 INFO L87 Difference]: Start difference. First operand 326 states and 703 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:56:57,082 INFO L93 Difference]: Finished difference Result 656 states and 1314 transitions. [2021-08-21 12:56:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-21 12:56:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:56:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:56:57,083 INFO L225 Difference]: With dead ends: 656 [2021-08-21 12:56:57,083 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 12:56:57,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4547 ImplicationChecksByTransitivity, 2382.2ms TimeCoverageRelationStatistics Valid=1638, Invalid=12882, Unknown=0, NotChecked=0, Total=14520 [2021-08-21 12:56:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 12:56:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 332. [2021-08-21 12:56:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.1722054380664653) internal successors, (719), 331 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:56:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 719 transitions. [2021-08-21 12:56:57,087 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 719 transitions. Word has length 43 [2021-08-21 12:56:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:56:57,087 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 719 transitions. [2021-08-21 12:56:57,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:56:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 719 transitions. [2021-08-21 12:56:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:56:57,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:56:57,088 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:56:57,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 12:56:57,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:56:57,288 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:56:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:56:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -65753689, now seen corresponding path program 136 times [2021-08-21 12:56:57,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:56:57,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413107647] [2021-08-21 12:56:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:56:57,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:56:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:56:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:56:57,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:56:57,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413107647] [2021-08-21 12:56:57,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413107647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:56:57,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455886310] [2021-08-21 12:56:57,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:56:57,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:56:57,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:56:57,613 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) [2021-08-21 12:56:57,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:57:03,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:03,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:03,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:57:03,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:03,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455886310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:03,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:03,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:57:03,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153827872] [2021-08-21 12:57:03,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:57:03,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:57:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:57:03,935 INFO L87 Difference]: Start difference. First operand 332 states and 719 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:57:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:06,580 INFO L93 Difference]: Finished difference Result 664 states and 1340 transitions. [2021-08-21 12:57:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-21 12:57:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:57:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:06,581 INFO L225 Difference]: With dead ends: 664 [2021-08-21 12:57:06,581 INFO L226 Difference]: Without dead ends: 626 [2021-08-21 12:57:06,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4962 ImplicationChecksByTransitivity, 2502.7ms TimeCoverageRelationStatistics Valid=1819, Invalid=13931, Unknown=0, NotChecked=0, Total=15750 [2021-08-21 12:57:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-08-21 12:57:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 338. [2021-08-21 12:57:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1810089020771515) internal successors, (735), 337 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 735 transitions. [2021-08-21 12:57:06,586 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 735 transitions. Word has length 43 [2021-08-21 12:57:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:06,586 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 735 transitions. [2021-08-21 12:57:06,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:57:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 735 transitions. [2021-08-21 12:57:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:57:06,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:06,586 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:06,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 12:57:06,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:06,787 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash 766670827, now seen corresponding path program 137 times [2021-08-21 12:57:06,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:06,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662106417] [2021-08-21 12:57:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:06,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:07,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:07,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662106417] [2021-08-21 12:57:07,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662106417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:07,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065820175] [2021-08-21 12:57:07,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:07,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:07,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:07,128 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) [2021-08-21 12:57:07,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:57:12,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:57:12,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:12,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:57:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:13,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065820175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:13,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:13,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:57:13,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996974931] [2021-08-21 12:57:13,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:57:13,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:57:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:57:13,500 INFO L87 Difference]: Start difference. First operand 338 states and 735 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:57:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:16,470 INFO L93 Difference]: Finished difference Result 760 states and 1516 transitions. [2021-08-21 12:57:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-08-21 12:57:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:57:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:16,471 INFO L225 Difference]: With dead ends: 760 [2021-08-21 12:57:16,471 INFO L226 Difference]: Without dead ends: 715 [2021-08-21 12:57:16,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5258 ImplicationChecksByTransitivity, 2721.2ms TimeCoverageRelationStatistics Valid=2003, Invalid=14767, Unknown=0, NotChecked=0, Total=16770 [2021-08-21 12:57:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-08-21 12:57:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 342. [2021-08-21 12:57:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.187683284457478) internal successors, (746), 341 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 746 transitions. [2021-08-21 12:57:16,476 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 746 transitions. Word has length 43 [2021-08-21 12:57:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:16,476 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 746 transitions. [2021-08-21 12:57:16,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:57:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 746 transitions. [2021-08-21 12:57:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:57:16,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:16,477 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:16,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:16,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 12:57:16,677 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash -498257033, now seen corresponding path program 138 times [2021-08-21 12:57:16,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:16,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659073713] [2021-08-21 12:57:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:16,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:17,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:17,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659073713] [2021-08-21 12:57:17,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659073713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:17,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376797084] [2021-08-21 12:57:17,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:17,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:17,019 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) [2021-08-21 12:57:17,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:57:22,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:57:22,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:22,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-21 12:57:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:23,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376797084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:23,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 12:57:23,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010243277] [2021-08-21 12:57:23,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 12:57:23,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 12:57:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:57:23,626 INFO L87 Difference]: Start difference. First operand 342 states and 746 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:57:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:26,450 INFO L93 Difference]: Finished difference Result 632 states and 1285 transitions. [2021-08-21 12:57:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-21 12:57:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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 43 [2021-08-21 12:57:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:26,451 INFO L225 Difference]: With dead ends: 632 [2021-08-21 12:57:26,451 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 12:57:26,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 2659.7ms TimeCoverageRelationStatistics Valid=1885, Invalid=12395, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 12:57:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 12:57:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 320. [2021-08-21 12:57:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.153605015673981) internal successors, (687), 319 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 687 transitions. [2021-08-21 12:57:26,455 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 687 transitions. Word has length 43 [2021-08-21 12:57:26,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:26,455 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 687 transitions. [2021-08-21 12:57:26,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 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) [2021-08-21 12:57:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 687 transitions. [2021-08-21 12:57:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:57:26,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:26,456 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:26,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 12:57:26,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 12:57:26,656 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:57:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1211485409, now seen corresponding path program 139 times [2021-08-21 12:57:26,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:26,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70090998] [2021-08-21 12:57:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:26,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:26,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:26,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70090998] [2021-08-21 12:57:26,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70090998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:26,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273151042] [2021-08-21 12:57:26,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:26,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:26,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:26,981 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) [2021-08-21 12:57:26,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:57:31,838 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:57:31,838 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 [2021-08-21 12:57:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:32,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-21 12:57:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:32,691 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-21 12:57:32,692 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:57:32,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:32,880 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 [2021-08-21 12:57:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:32,893 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 44 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. [2021-08-21 12:57:32,894 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:57:32,894 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:57:32,897 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:57:32,897 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:57:32,898 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:57:32 BasicIcfg [2021-08-21 12:57:32,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:57:32,899 INFO L168 Benchmark]: Toolchain (without parser) took 708642.03 ms. Allocated memory was 192.9 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 173.2 MB in the beginning and 370.9 MB in the end (delta: -197.6 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 12:57:32,900 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 192.9 MB. Free memory is still 174.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:57:32,900 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.27 ms. Allocated memory is still 192.9 MB. Free memory was 173.2 MB in the beginning and 171.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:57:32,900 INFO L168 Benchmark]: Boogie Preprocessor took 12.85 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 170.7 MB in the end (delta: 935.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:57:32,900 INFO L168 Benchmark]: RCFGBuilder took 156.52 ms. Allocated memory is still 192.9 MB. Free memory was 170.7 MB in the beginning and 159.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-21 12:57:32,900 INFO L168 Benchmark]: TraceAbstraction took 708447.73 ms. Allocated memory was 192.9 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 158.8 MB in the beginning and 370.9 MB in the end (delta: -212.1 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 12:57:32,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 192.9 MB. Free memory is still 174.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.27 ms. Allocated memory is still 192.9 MB. Free memory was 173.2 MB in the beginning and 171.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.85 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 170.7 MB in the end (delta: 935.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 156.52 ms. Allocated memory is still 192.9 MB. Free memory was 170.7 MB in the beginning and 159.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 708447.73 ms. Allocated memory was 192.9 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 158.8 MB in the beginning and 370.9 MB in the end (delta: -212.1 MB). Peak memory consumption was 1.6 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: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 44 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 45]: 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 44 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 45]: 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 44 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 708395.3ms, OverallIterations: 141, TraceHistogramMax: 7, EmptinessCheckTime: 64.5ms, AutomataDifference: 221764.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5268 SDtfs, 31604 SDslu, 70343 SDs, 0 SdLazy, 163063 SolverSat, 9631 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49899.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13258 GetRequests, 2380 SyntacticMatches, 144 SemanticMatches, 10734 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301150 ImplicationChecksByTransitivity, 207756.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=572occurred in iteration=53, InterpolantAutomatonStates: 8516, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 538.3ms AutomataMinimizationTime, 140 MinimizatonAttempts, 28478 StatesRemovedByMinimization, 140 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 372.2ms SsaConstructionTime, 2177.4ms SatisfiabilityAnalysisTime, 111157.9ms InterpolantComputationTime, 8784 NumberOfCodeBlocks, 8784 NumberOfCodeBlocksAsserted, 624 NumberOfCheckSat, 8506 ConstructedInterpolants, 0 QuantifiedInterpolants, 118848 SizeOfPredicates, 670 NumberOfNonLiveVariables, 9629 ConjunctsInSsa, 5634 ConjunctsInUnsatCore, 278 InterpolantComputations, 2 PerfectInterpolantSequences, 1715/11599 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