/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:27:47,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:27:47,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:27:47,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:27:47,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 15:27:47,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:27:47,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:27:47,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:27:47,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:27:47,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:27:47,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:27:47,973 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:27:47,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:27:47,973 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:27:47,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:27:47,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:27:47,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:27:47,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:27:47,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:27:47,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:27:47,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:27:47,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:27:47,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:27:47,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:27:47,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:27:47,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:27:47,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:27:47,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:27:47,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:27:47,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:27:47,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:27:47,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:27:47,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:27:47,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:27:47,977 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:27:47,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:27:47,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:27:48,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:27:48,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:27:48,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:27:48,313 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:27:48,314 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:27:48,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-08-06 15:27:48,315 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-08-06 15:27:48,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:27:48,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:27:48,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:27:48,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:27:48,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:27:48,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:27:48,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:27:48,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:27:48,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:27:48,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:27:48,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:27:48,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:27:48,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:27:48,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/1) ... [2021-08-06 15:27:48,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:27:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:48,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 15:27:48,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 15:27:48,441 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:27:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:27:48,441 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:27:48,441 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:27:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:27:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:27:48,442 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:27:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:27:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:27:48,443 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:27:48,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:27:48,575 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:27:48,577 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:27:48 BoogieIcfgContainer [2021-08-06 15:27:48,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:27:48,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:27:48,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:27:48,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:27:48,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:27:48" (1/2) ... [2021-08-06 15:27:48,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca2e279 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:27:48, skipping insertion in model container [2021-08-06 15:27:48,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:27:48" (2/2) ... [2021-08-06 15:27:48,583 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-08-06 15:27:48,587 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:27:48,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:27:48,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:27:48,588 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:27:48,614 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 15:27:48,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:27:48,654 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 15:27:48,655 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 15:27:48,663 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-08-06 15:27:48,691 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) [2021-08-06 15:27:48,693 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) [2021-08-06 15:27:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 15:27:48,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:48,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:48,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash -618238623, now seen corresponding path program 1 times [2021-08-06 15:27:48,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:48,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527151121] [2021-08-06 15:27:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:48,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:48,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:48,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527151121] [2021-08-06 15:27:48,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527151121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:27:48,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:27:48,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:27:48,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198676746] [2021-08-06 15:27:48,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:27:48,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:48,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:27:48,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:27:48,925 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), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:48,965 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-08-06 15:27:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:27:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 15:27:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:48,973 INFO L225 Difference]: With dead ends: 43 [2021-08-06 15:27:48,974 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 15:27:48,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:27:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 15:27:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-08-06 15:27:48,999 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) [2021-08-06 15:27:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-08-06 15:27:49,001 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-08-06 15:27:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:49,002 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-08-06 15:27:49,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-08-06 15:27:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:27:49,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:49,003 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:49,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:27:49,003 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1950061855, now seen corresponding path program 1 times [2021-08-06 15:27:49,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:49,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865291562] [2021-08-06 15:27:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:49,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:27:49,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:49,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865291562] [2021-08-06 15:27:49,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865291562] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:27:49,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:27:49,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:27:49,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072022020] [2021-08-06 15:27:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:27:49,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:49,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:27:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:27:49,085 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:49,128 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-08-06 15:27:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:27:49,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 15:27:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:49,133 INFO L225 Difference]: With dead ends: 50 [2021-08-06 15:27:49,133 INFO L226 Difference]: Without dead ends: 50 [2021-08-06 15:27:49,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:27:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-06 15:27:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-06 15:27:49,151 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) [2021-08-06 15:27:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-08-06 15:27:49,154 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-08-06 15:27:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:49,154 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-08-06 15:27:49,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-08-06 15:27:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 15:27:49,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:49,156 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:49,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:27:49,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:49,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:49,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1007893021, now seen corresponding path program 1 times [2021-08-06 15:27:49,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:49,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426051664] [2021-08-06 15:27:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:49,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:49,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:49,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426051664] [2021-08-06 15:27:49,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426051664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:49,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166307503] [2021-08-06 15:27:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:49,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:49,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:27:49,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:27:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:27:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:50,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166307503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:50,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:50,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:27:50,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913632301] [2021-08-06 15:27:50,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:27:50,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:27:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:27:50,126 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:50,227 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-08-06 15:27:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:27:50,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 19 [2021-08-06 15:27:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:50,229 INFO L225 Difference]: With dead ends: 144 [2021-08-06 15:27:50,229 INFO L226 Difference]: Without dead ends: 113 [2021-08-06 15:27:50,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:27:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-06 15:27:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-08-06 15:27:50,235 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) [2021-08-06 15:27:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-08-06 15:27:50,236 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-08-06 15:27:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:50,236 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-08-06 15:27:50,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-08-06 15:27:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:27:50,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:50,237 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:50,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:50,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:50,453 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:50,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1821743003, now seen corresponding path program 2 times [2021-08-06 15:27:50,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:50,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018751724] [2021-08-06 15:27:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:50,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:50,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:50,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018751724] [2021-08-06 15:27:50,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018751724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:50,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773994681] [2021-08-06 15:27:50,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:50,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:50,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:50,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:27:50,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:27:50,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:50,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:27:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773994681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:51,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:51,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 15:27:51,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767941700] [2021-08-06 15:27:51,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:27:51,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:27:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:27:51,012 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:51,358 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-08-06 15:27:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:27:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 15:27:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:51,360 INFO L225 Difference]: With dead ends: 167 [2021-08-06 15:27:51,360 INFO L226 Difference]: Without dead ends: 167 [2021-08-06 15:27:51,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:27:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-06 15:27:51,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-08-06 15:27:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-08-06 15:27:51,368 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-08-06 15:27:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:51,369 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-08-06 15:27:51,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-08-06 15:27:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:27:51,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:51,370 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:51,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:51,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-06 15:27:51,597 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2071555341, now seen corresponding path program 3 times [2021-08-06 15:27:51,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:51,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072023130] [2021-08-06 15:27:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:51,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:51,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:51,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072023130] [2021-08-06 15:27:51,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072023130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:51,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514650122] [2021-08-06 15:27:51,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:51,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:51,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:51,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:27:51,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:27:51,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:27:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:27:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:52,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514650122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:52,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:52,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 15:27:52,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117713219] [2021-08-06 15:27:52,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:27:52,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:27:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:27:52,079 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:52,363 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-08-06 15:27:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:27:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 15:27:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:52,365 INFO L225 Difference]: With dead ends: 141 [2021-08-06 15:27:52,365 INFO L226 Difference]: Without dead ends: 139 [2021-08-06 15:27:52,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:27:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-06 15:27:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-08-06 15:27:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-08-06 15:27:52,371 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-08-06 15:27:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:52,372 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-08-06 15:27:52,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-08-06 15:27:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:27:52,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:52,373 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:52,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:52,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:52,589 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1720260825, now seen corresponding path program 4 times [2021-08-06 15:27:52,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:52,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723328585] [2021-08-06 15:27:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:52,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:52,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:52,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723328585] [2021-08-06 15:27:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723328585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:52,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058087390] [2021-08-06 15:27:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:52,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:52,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:27:52,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:27:52,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:52,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:27:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:53,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058087390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:53,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:53,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-08-06 15:27:53,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072723104] [2021-08-06 15:27:53,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:53,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:53,492 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:54,138 INFO L93 Difference]: Finished difference Result 340 states and 642 transitions. [2021-08-06 15:27:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:27:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:27:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:54,140 INFO L225 Difference]: With dead ends: 340 [2021-08-06 15:27:54,140 INFO L226 Difference]: Without dead ends: 290 [2021-08-06 15:27:54,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:27:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-08-06 15:27:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 93. [2021-08-06 15:27:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-08-06 15:27:54,149 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-08-06 15:27:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:54,149 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-08-06 15:27:54,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-08-06 15:27:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:27:54,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:54,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:54,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:54,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:54,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1505995819, now seen corresponding path program 5 times [2021-08-06 15:27:54,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:54,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630247409] [2021-08-06 15:27:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:54,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:54,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:54,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630247409] [2021-08-06 15:27:54,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630247409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:54,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346997835] [2021-08-06 15:27:54,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:54,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:54,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:54,633 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:27:54,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:27:54,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:54,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:27:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:55,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346997835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:55,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:55,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-08-06 15:27:55,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186956545] [2021-08-06 15:27:55,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:55,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:55,295 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:56,478 INFO L93 Difference]: Finished difference Result 443 states and 871 transitions. [2021-08-06 15:27:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:27:56,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:27:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:56,482 INFO L225 Difference]: With dead ends: 443 [2021-08-06 15:27:56,482 INFO L226 Difference]: Without dead ends: 383 [2021-08-06 15:27:56,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 986.1ms TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:27:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-06 15:27:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 147. [2021-08-06 15:27:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-08-06 15:27:56,498 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 23 [2021-08-06 15:27:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:56,499 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-08-06 15:27:56,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-08-06 15:27:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:27:56,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:56,501 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:56,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:56,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:56,717 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:56,717 INFO L82 PathProgramCache]: Analyzing trace with hash 325174059, now seen corresponding path program 6 times [2021-08-06 15:27:56,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:56,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849496197] [2021-08-06 15:27:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:56,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:56,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:56,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849496197] [2021-08-06 15:27:56,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849496197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:56,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473609598] [2021-08-06 15:27:56,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:56,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:56,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:56,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:27:56,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:27:57,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:27:57,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:57,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:57,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473609598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:57,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:57,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-08-06 15:27:57,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215767413] [2021-08-06 15:27:57,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:27:57,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:27:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:27:57,260 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:57,552 INFO L93 Difference]: Finished difference Result 352 states and 686 transitions. [2021-08-06 15:27:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:27:57,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:27:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:57,555 INFO L225 Difference]: With dead ends: 352 [2021-08-06 15:27:57,555 INFO L226 Difference]: Without dead ends: 307 [2021-08-06 15:27:57,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:27:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-06 15:27:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 174. [2021-08-06 15:27:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.0751445086705202) internal successors, (359), 173 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 359 transitions. [2021-08-06 15:27:57,562 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 359 transitions. Word has length 23 [2021-08-06 15:27:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:57,563 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 359 transitions. [2021-08-06 15:27:57,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 359 transitions. [2021-08-06 15:27:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:27:57,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:57,564 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:57,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-06 15:27:57,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:57,787 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:27:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1378998987, now seen corresponding path program 7 times [2021-08-06 15:27:57,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:57,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319075213] [2021-08-06 15:27:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:57,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:58,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:58,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319075213] [2021-08-06 15:27:58,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319075213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:58,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484221982] [2021-08-06 15:27:58,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:58,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:58,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:27:58,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:27:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:27:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:58,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484221982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:58,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:58,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-08-06 15:27:58,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910123767] [2021-08-06 15:27:58,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:58,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:58,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:58,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:58,736 INFO L87 Difference]: Start difference. First operand 174 states and 359 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:59,915 INFO L93 Difference]: Finished difference Result 452 states and 872 transitions. [2021-08-06 15:27:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:27:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:27:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:59,918 INFO L225 Difference]: With dead ends: 452 [2021-08-06 15:27:59,918 INFO L226 Difference]: Without dead ends: 413 [2021-08-06 15:27:59,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1060.6ms TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:27:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-06 15:27:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 160. [2021-08-06 15:27:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.0754716981132075) internal successors, (330), 159 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 330 transitions. [2021-08-06 15:27:59,927 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 330 transitions. Word has length 23 [2021-08-06 15:27:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:59,928 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 330 transitions. [2021-08-06 15:27:59,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 330 transitions. [2021-08-06 15:27:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:27:59,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:59,929 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:59,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-06 15:28:00,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:00,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 256165081, now seen corresponding path program 8 times [2021-08-06 15:28:00,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:00,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189695713] [2021-08-06 15:28:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:00,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:00,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:00,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189695713] [2021-08-06 15:28:00,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189695713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:00,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201473843] [2021-08-06 15:28:00,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:00,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:00,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:00,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:28:00,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:28:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:00,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201473843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:00,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:00,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-06 15:28:00,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222817205] [2021-08-06 15:28:00,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:00,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:00,771 INFO L87 Difference]: Start difference. First operand 160 states and 330 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:01,152 INFO L93 Difference]: Finished difference Result 354 states and 706 transitions. [2021-08-06 15:28:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:28:01,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:28:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:01,154 INFO L225 Difference]: With dead ends: 354 [2021-08-06 15:28:01,155 INFO L226 Difference]: Without dead ends: 350 [2021-08-06 15:28:01,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:28:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-08-06 15:28:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 201. [2021-08-06 15:28:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.125) internal successors, (425), 200 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) [2021-08-06 15:28:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 425 transitions. [2021-08-06 15:28:01,161 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 425 transitions. Word has length 23 [2021-08-06 15:28:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 425 transitions. [2021-08-06 15:28:01,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 425 transitions. [2021-08-06 15:28:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:28:01,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:01,163 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:01,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:01,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 15:28:01,374 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:01,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1417377961, now seen corresponding path program 9 times [2021-08-06 15:28:01,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:01,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401161384] [2021-08-06 15:28:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:01,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:01,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:01,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401161384] [2021-08-06 15:28:01,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401161384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:01,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106228836] [2021-08-06 15:28:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:01,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:01,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:01,480 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:01,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:28:01,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:28:01,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:28:01,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:02,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106228836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:02,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:02,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 15:28:02,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680497224] [2021-08-06 15:28:02,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:02,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:02,057 INFO L87 Difference]: Start difference. First operand 201 states and 425 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:02,516 INFO L93 Difference]: Finished difference Result 444 states and 879 transitions. [2021-08-06 15:28:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:28:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:28:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:02,519 INFO L225 Difference]: With dead ends: 444 [2021-08-06 15:28:02,519 INFO L226 Difference]: Without dead ends: 444 [2021-08-06 15:28:02,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:28:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-06 15:28:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 215. [2021-08-06 15:28:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.130841121495327) internal successors, (456), 214 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 456 transitions. [2021-08-06 15:28:02,526 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 456 transitions. Word has length 25 [2021-08-06 15:28:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:02,527 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 456 transitions. [2021-08-06 15:28:02,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 456 transitions. [2021-08-06 15:28:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:28:02,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:02,528 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:02,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:02,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:02,741 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -781200115, now seen corresponding path program 10 times [2021-08-06 15:28:02,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:02,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345728307] [2021-08-06 15:28:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:02,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:02,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:02,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345728307] [2021-08-06 15:28:02,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345728307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:02,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815927365] [2021-08-06 15:28:02,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:02,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:02,818 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:02,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:28:03,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:03,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:28:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:03,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815927365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:03,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:03,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-08-06 15:28:03,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447310435] [2021-08-06 15:28:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:28:03,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:28:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:28:03,523 INFO L87 Difference]: Start difference. First operand 215 states and 456 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:04,225 INFO L93 Difference]: Finished difference Result 357 states and 718 transitions. [2021-08-06 15:28:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:28:04,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:28:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:04,232 INFO L225 Difference]: With dead ends: 357 [2021-08-06 15:28:04,232 INFO L226 Difference]: Without dead ends: 355 [2021-08-06 15:28:04,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 640.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:28:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-06 15:28:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 215. [2021-08-06 15:28:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.1261682242990654) internal successors, (455), 214 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 455 transitions. [2021-08-06 15:28:04,239 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 455 transitions. Word has length 25 [2021-08-06 15:28:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:04,239 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 455 transitions. [2021-08-06 15:28:04,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 455 transitions. [2021-08-06 15:28:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:04,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:04,240 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:04,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:04,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 15:28:04,449 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1518663275, now seen corresponding path program 11 times [2021-08-06 15:28:04,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:04,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274083106] [2021-08-06 15:28:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:04,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:04,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:04,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274083106] [2021-08-06 15:28:04,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274083106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:04,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938855124] [2021-08-06 15:28:04,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:04,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:04,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:04,712 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:04,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:28:04,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:28:04,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:04,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:28:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:05,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938855124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:05,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:05,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:28:05,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5134924] [2021-08-06 15:28:05,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:28:05,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:05,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:28:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:05,520 INFO L87 Difference]: Start difference. First operand 215 states and 455 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:06,429 INFO L93 Difference]: Finished difference Result 594 states and 1208 transitions. [2021-08-06 15:28:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:28:06,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:28:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:06,432 INFO L225 Difference]: With dead ends: 594 [2021-08-06 15:28:06,432 INFO L226 Difference]: Without dead ends: 537 [2021-08-06 15:28:06,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1694, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:28:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-06 15:28:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 243. [2021-08-06 15:28:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1487603305785123) internal successors, (520), 242 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) [2021-08-06 15:28:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 520 transitions. [2021-08-06 15:28:06,441 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 520 transitions. Word has length 27 [2021-08-06 15:28:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:06,441 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 520 transitions. [2021-08-06 15:28:06,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 520 transitions. [2021-08-06 15:28:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:06,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:06,442 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:06,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 15:28:06,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 15:28:06,649 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1268903833, now seen corresponding path program 12 times [2021-08-06 15:28:06,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:06,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958888171] [2021-08-06 15:28:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:06,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:06,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:06,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958888171] [2021-08-06 15:28:06,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958888171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:06,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176271772] [2021-08-06 15:28:06,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:06,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:06,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:06,907 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:06,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:28:07,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:28:07,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:28:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:07,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176271772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:07,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:07,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:28:07,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937593809] [2021-08-06 15:28:07,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:28:07,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:07,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:28:07,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:07,721 INFO L87 Difference]: Start difference. First operand 243 states and 520 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:08,982 INFO L93 Difference]: Finished difference Result 638 states and 1299 transitions. [2021-08-06 15:28:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:28:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:28:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:08,985 INFO L225 Difference]: With dead ends: 638 [2021-08-06 15:28:08,985 INFO L226 Difference]: Without dead ends: 590 [2021-08-06 15:28:08,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1040.9ms TimeCoverageRelationStatistics Valid=375, Invalid=2595, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:28:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-06 15:28:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 281. [2021-08-06 15:28:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.182142857142857) internal successors, (611), 280 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 611 transitions. [2021-08-06 15:28:08,997 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 611 transitions. Word has length 27 [2021-08-06 15:28:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:08,997 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 611 transitions. [2021-08-06 15:28:08,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 611 transitions. [2021-08-06 15:28:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:08,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:08,998 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:09,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:09,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 15:28:09,213 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2127718247, now seen corresponding path program 13 times [2021-08-06 15:28:09,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:09,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403589978] [2021-08-06 15:28:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:09,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:09,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:09,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403589978] [2021-08-06 15:28:09,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403589978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:09,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028858154] [2021-08-06 15:28:09,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:09,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:09,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:09,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:09,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:28:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:28:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:10,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028858154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:10,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:10,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:28:10,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406881892] [2021-08-06 15:28:10,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:28:10,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:28:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:10,343 INFO L87 Difference]: Start difference. First operand 281 states and 611 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:11,648 INFO L93 Difference]: Finished difference Result 660 states and 1363 transitions. [2021-08-06 15:28:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:28:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:28:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:11,651 INFO L225 Difference]: With dead ends: 660 [2021-08-06 15:28:11,651 INFO L226 Difference]: Without dead ends: 612 [2021-08-06 15:28:11,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1091.5ms TimeCoverageRelationStatistics Valid=430, Invalid=2432, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:28:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-06 15:28:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 323. [2021-08-06 15:28:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.2080745341614905) internal successors, (711), 322 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 711 transitions. [2021-08-06 15:28:11,661 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 711 transitions. Word has length 27 [2021-08-06 15:28:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:11,661 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 711 transitions. [2021-08-06 15:28:11,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 711 transitions. [2021-08-06 15:28:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:11,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:11,662 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:11,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-06 15:28:11,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 15:28:11,877 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash 946896487, now seen corresponding path program 14 times [2021-08-06 15:28:11,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:11,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591960607] [2021-08-06 15:28:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:11,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:12,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:12,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591960607] [2021-08-06 15:28:12,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591960607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:12,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646705803] [2021-08-06 15:28:12,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:12,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:12,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:12,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:28:12,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:12,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:12,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646705803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:12,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:12,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-08-06 15:28:12,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134509618] [2021-08-06 15:28:12,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:12,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:12,686 INFO L87 Difference]: Start difference. First operand 323 states and 711 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:13,627 INFO L93 Difference]: Finished difference Result 763 states and 1603 transitions. [2021-08-06 15:28:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:28:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 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 27 [2021-08-06 15:28:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:13,630 INFO L225 Difference]: With dead ends: 763 [2021-08-06 15:28:13,630 INFO L226 Difference]: Without dead ends: 718 [2021-08-06 15:28:13,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 776.6ms TimeCoverageRelationStatistics Valid=521, Invalid=2235, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:28:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-06 15:28:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 386. [2021-08-06 15:28:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.2155844155844155) internal successors, (853), 385 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 853 transitions. [2021-08-06 15:28:13,642 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 853 transitions. Word has length 27 [2021-08-06 15:28:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:13,642 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 853 transitions. [2021-08-06 15:28:13,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 853 transitions. [2021-08-06 15:28:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:13,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:13,644 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:13,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:13,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:13,865 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2036570091, now seen corresponding path program 15 times [2021-08-06 15:28:13,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:13,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085210651] [2021-08-06 15:28:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:13,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:14,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:14,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085210651] [2021-08-06 15:28:14,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085210651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:14,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482751344] [2021-08-06 15:28:14,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:14,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:14,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:14,126 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:14,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:28:14,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:28:14,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:28:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:15,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482751344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:15,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:15,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:28:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088084443] [2021-08-06 15:28:15,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:28:15,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:28:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:15,002 INFO L87 Difference]: Start difference. First operand 386 states and 853 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:17,749 INFO L93 Difference]: Finished difference Result 1245 states and 2563 transitions. [2021-08-06 15:28:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:28:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:28:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:17,754 INFO L225 Difference]: With dead ends: 1245 [2021-08-06 15:28:17,754 INFO L226 Difference]: Without dead ends: 1166 [2021-08-06 15:28:17,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 2218.0ms TimeCoverageRelationStatistics Valid=736, Invalid=5426, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:28:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-08-06 15:28:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 476. [2021-08-06 15:28:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.258947368421053) internal successors, (1073), 475 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1073 transitions. [2021-08-06 15:28:17,776 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1073 transitions. Word has length 27 [2021-08-06 15:28:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:17,777 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1073 transitions. [2021-08-06 15:28:17,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1073 transitions. [2021-08-06 15:28:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:17,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:17,778 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:17,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 15:28:17,992 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash 201920533, now seen corresponding path program 16 times [2021-08-06 15:28:17,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:17,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875506559] [2021-08-06 15:28:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:17,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:18,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:18,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875506559] [2021-08-06 15:28:18,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875506559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:18,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919559842] [2021-08-06 15:28:18,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:18,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:18,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:18,118 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:18,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:28:18,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:18,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:28:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:19,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919559842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:19,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:19,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:28:19,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613699099] [2021-08-06 15:28:19,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:28:19,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:28:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:19,153 INFO L87 Difference]: Start difference. First operand 476 states and 1073 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:20,112 INFO L93 Difference]: Finished difference Result 1056 states and 2272 transitions. [2021-08-06 15:28:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:28:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:28:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:20,116 INFO L225 Difference]: With dead ends: 1056 [2021-08-06 15:28:20,116 INFO L226 Difference]: Without dead ends: 1048 [2021-08-06 15:28:20,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 821.1ms TimeCoverageRelationStatistics Valid=526, Invalid=2126, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:28:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-08-06 15:28:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 460. [2021-08-06 15:28:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.259259259259259) internal successors, (1037), 459 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1037 transitions. [2021-08-06 15:28:20,130 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1037 transitions. Word has length 27 [2021-08-06 15:28:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:20,131 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1037 transitions. [2021-08-06 15:28:20,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1037 transitions. [2021-08-06 15:28:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:20,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:20,132 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:20,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:20,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 15:28:20,354 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash 303397925, now seen corresponding path program 17 times [2021-08-06 15:28:20,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:20,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888389590] [2021-08-06 15:28:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:20,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:20,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:20,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888389590] [2021-08-06 15:28:20,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888389590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:20,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446581306] [2021-08-06 15:28:20,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:20,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:20,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:20,637 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:20,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:28:21,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:28:21,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:28:21,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:21,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446581306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:21,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:21,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:28:21,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500746592] [2021-08-06 15:28:21,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:28:21,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:28:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:21,670 INFO L87 Difference]: Start difference. First operand 460 states and 1037 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:23,914 INFO L93 Difference]: Finished difference Result 1004 states and 2115 transitions. [2021-08-06 15:28:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:28:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:28:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:23,917 INFO L225 Difference]: With dead ends: 1004 [2021-08-06 15:28:23,917 INFO L226 Difference]: Without dead ends: 941 [2021-08-06 15:28:23,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2015.7ms TimeCoverageRelationStatistics Valid=596, Invalid=3694, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:28:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-08-06 15:28:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 473. [2021-08-06 15:28:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.2203389830508473) internal successors, (1048), 472 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) [2021-08-06 15:28:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1048 transitions. [2021-08-06 15:28:23,930 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1048 transitions. Word has length 27 [2021-08-06 15:28:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:23,930 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1048 transitions. [2021-08-06 15:28:23,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1048 transitions. [2021-08-06 15:28:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:28:23,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:23,932 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:23,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:24,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:24,155 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:24,156 INFO L82 PathProgramCache]: Analyzing trace with hash -846524493, now seen corresponding path program 18 times [2021-08-06 15:28:24,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:24,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728822351] [2021-08-06 15:28:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:24,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:28:24,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:24,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728822351] [2021-08-06 15:28:24,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728822351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:24,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199871156] [2021-08-06 15:28:24,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:24,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:24,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:24,285 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:24,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:28:24,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:28:24,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 15:28:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:25,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199871156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:25,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:25,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:28:25,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415854442] [2021-08-06 15:28:25,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:28:25,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:28:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:28:25,182 INFO L87 Difference]: Start difference. First operand 473 states and 1048 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:25,732 INFO L93 Difference]: Finished difference Result 1102 states and 2287 transitions. [2021-08-06 15:28:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:28:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:28:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:25,739 INFO L225 Difference]: With dead ends: 1102 [2021-08-06 15:28:25,739 INFO L226 Difference]: Without dead ends: 1090 [2021-08-06 15:28:25,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:28:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-08-06 15:28:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 561. [2021-08-06 15:28:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.219642857142857) internal successors, (1243), 560 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1243 transitions. [2021-08-06 15:28:25,753 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1243 transitions. Word has length 27 [2021-08-06 15:28:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:25,753 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1243 transitions. [2021-08-06 15:28:25,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1243 transitions. [2021-08-06 15:28:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:28:25,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:25,754 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:25,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:25,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:25,968 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash 167708947, now seen corresponding path program 19 times [2021-08-06 15:28:25,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:25,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620703233] [2021-08-06 15:28:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:25,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:26,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:26,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620703233] [2021-08-06 15:28:26,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620703233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:26,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995443826] [2021-08-06 15:28:26,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:26,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:26,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:26,108 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:26,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:28:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:28:26,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:27,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995443826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:27,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:27,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:28:27,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970254925] [2021-08-06 15:28:27,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:28:27,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:28:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:28:27,498 INFO L87 Difference]: Start difference. First operand 561 states and 1243 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:28,265 INFO L93 Difference]: Finished difference Result 881 states and 1831 transitions. [2021-08-06 15:28:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:28:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 [2021-08-06 15:28:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:28,268 INFO L225 Difference]: With dead ends: 881 [2021-08-06 15:28:28,268 INFO L226 Difference]: Without dead ends: 872 [2021-08-06 15:28:28,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=500, Invalid=1852, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:28:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-08-06 15:28:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 458. [2021-08-06 15:28:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.1422319474835887) internal successors, (979), 457 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 979 transitions. [2021-08-06 15:28:28,279 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 979 transitions. Word has length 29 [2021-08-06 15:28:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:28,280 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 979 transitions. [2021-08-06 15:28:28,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 979 transitions. [2021-08-06 15:28:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:28:28,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:28,281 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:28,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:28,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:28,509 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1561014771, now seen corresponding path program 20 times [2021-08-06 15:28:28,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:28,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041185094] [2021-08-06 15:28:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:28,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:28,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:28,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041185094] [2021-08-06 15:28:28,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041185094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:28,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700498481] [2021-08-06 15:28:28,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:28,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:28,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:28,615 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:28,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:28:29,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:29,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:28:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:29,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700498481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:29,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:29,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-08-06 15:28:29,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392087247] [2021-08-06 15:28:29,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:29,630 INFO L87 Difference]: Start difference. First operand 458 states and 979 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:30,725 INFO L93 Difference]: Finished difference Result 729 states and 1508 transitions. [2021-08-06 15:28:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:28:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:28:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:30,735 INFO L225 Difference]: With dead ends: 729 [2021-08-06 15:28:30,735 INFO L226 Difference]: Without dead ends: 727 [2021-08-06 15:28:30,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:28:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-08-06 15:28:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 489. [2021-08-06 15:28:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.165983606557377) internal successors, (1057), 488 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1057 transitions. [2021-08-06 15:28:30,746 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1057 transitions. Word has length 29 [2021-08-06 15:28:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:30,747 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1057 transitions. [2021-08-06 15:28:30,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1057 transitions. [2021-08-06 15:28:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:28:30,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:30,748 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:30,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:30,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 15:28:30,972 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:30,972 INFO L82 PathProgramCache]: Analyzing trace with hash 564963053, now seen corresponding path program 21 times [2021-08-06 15:28:30,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:30,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027383072] [2021-08-06 15:28:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:30,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:28:31,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:31,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027383072] [2021-08-06 15:28:31,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027383072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:31,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741624338] [2021-08-06 15:28:31,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:31,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:31,066 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:28:31,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:28:31,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:31,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:28:31,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:32,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741624338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:32,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:32,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-06 15:28:32,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558445896] [2021-08-06 15:28:32,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:28:32,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:28:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:32,484 INFO L87 Difference]: Start difference. First operand 489 states and 1057 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:33,187 INFO L93 Difference]: Finished difference Result 1065 states and 2237 transitions. [2021-08-06 15:28:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:28:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:28:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:33,190 INFO L225 Difference]: With dead ends: 1065 [2021-08-06 15:28:33,190 INFO L226 Difference]: Without dead ends: 1047 [2021-08-06 15:28:33,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:28:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-08-06 15:28:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 623. [2021-08-06 15:28:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 2.22508038585209) internal successors, (1384), 622 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1384 transitions. [2021-08-06 15:28:33,203 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1384 transitions. Word has length 29 [2021-08-06 15:28:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:33,203 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1384 transitions. [2021-08-06 15:28:33,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1384 transitions. [2021-08-06 15:28:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:28:33,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:33,205 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:33,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:33,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 15:28:33,420 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1331432529, now seen corresponding path program 22 times [2021-08-06 15:28:33,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:33,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181336651] [2021-08-06 15:28:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:33,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:33,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:33,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181336651] [2021-08-06 15:28:33,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181336651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:33,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231510747] [2021-08-06 15:28:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:33,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:33,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:33,710 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:33,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:28:34,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:34,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231510747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:34,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:34,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:28:34,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702118031] [2021-08-06 15:28:34,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:28:34,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:28:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:28:34,913 INFO L87 Difference]: Start difference. First operand 623 states and 1384 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:36,110 INFO L93 Difference]: Finished difference Result 1119 states and 2424 transitions. [2021-08-06 15:28:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 15:28:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:28:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:36,114 INFO L225 Difference]: With dead ends: 1119 [2021-08-06 15:28:36,114 INFO L226 Difference]: Without dead ends: 1080 [2021-08-06 15:28:36,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1056.3ms TimeCoverageRelationStatistics Valid=367, Invalid=2495, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:28:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-08-06 15:28:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 638. [2021-08-06 15:28:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.21978021978022) internal successors, (1414), 637 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1414 transitions. [2021-08-06 15:28:36,126 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1414 transitions. Word has length 31 [2021-08-06 15:28:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:36,127 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1414 transitions. [2021-08-06 15:28:36,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1414 transitions. [2021-08-06 15:28:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:28:36,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:36,128 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:36,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:36,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:36,352 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash 832087715, now seen corresponding path program 23 times [2021-08-06 15:28:36,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:36,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014527022] [2021-08-06 15:28:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:36,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:36,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:36,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014527022] [2021-08-06 15:28:36,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014527022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:36,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937989156] [2021-08-06 15:28:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:36,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:36,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:36,699 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:36,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:28:37,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:28:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:38,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937989156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:38,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:38,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:28:38,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565784125] [2021-08-06 15:28:38,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:28:38,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:28:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:28:38,028 INFO L87 Difference]: Start difference. First operand 638 states and 1414 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:39,620 INFO L93 Difference]: Finished difference Result 1135 states and 2454 transitions. [2021-08-06 15:28:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:28:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:28:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:39,623 INFO L225 Difference]: With dead ends: 1135 [2021-08-06 15:28:39,623 INFO L226 Difference]: Without dead ends: 1075 [2021-08-06 15:28:39,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1400.8ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:28:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-08-06 15:28:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 675. [2021-08-06 15:28:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.2195845697329375) internal successors, (1496), 674 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1496 transitions. [2021-08-06 15:28:39,636 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1496 transitions. Word has length 31 [2021-08-06 15:28:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:39,637 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1496 transitions. [2021-08-06 15:28:39,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1496 transitions. [2021-08-06 15:28:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:28:39,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:39,638 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:39,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:39,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:39,862 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash 810761635, now seen corresponding path program 24 times [2021-08-06 15:28:39,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:39,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961211042] [2021-08-06 15:28:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:39,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:40,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:40,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961211042] [2021-08-06 15:28:40,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961211042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:40,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586419434] [2021-08-06 15:28:40,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:40,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:40,225 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:40,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:28:40,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:28:40,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:40,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:41,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586419434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:41,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:41,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:28:41,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236362726] [2021-08-06 15:28:41,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:28:41,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:41,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:28:41,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:28:41,542 INFO L87 Difference]: Start difference. First operand 675 states and 1496 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:43,095 INFO L93 Difference]: Finished difference Result 1117 states and 2416 transitions. [2021-08-06 15:28:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:28:43,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:28:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:43,099 INFO L225 Difference]: With dead ends: 1117 [2021-08-06 15:28:43,099 INFO L226 Difference]: Without dead ends: 1081 [2021-08-06 15:28:43,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1388.0ms TimeCoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:28:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-08-06 15:28:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 699. [2021-08-06 15:28:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.2120343839541547) internal successors, (1544), 698 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1544 transitions. [2021-08-06 15:28:43,112 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1544 transitions. Word has length 31 [2021-08-06 15:28:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:43,112 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1544 transitions. [2021-08-06 15:28:43,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1544 transitions. [2021-08-06 15:28:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:28:43,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:43,114 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:43,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:43,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 15:28:43,329 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:43,330 INFO L82 PathProgramCache]: Analyzing trace with hash -87583581, now seen corresponding path program 25 times [2021-08-06 15:28:43,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:43,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102052601] [2021-08-06 15:28:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:43,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:43,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:43,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102052601] [2021-08-06 15:28:43,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102052601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:43,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170692314] [2021-08-06 15:28:43,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:43,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:43,652 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:43,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:28:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:44,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:45,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170692314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:45,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:45,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:28:45,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134631889] [2021-08-06 15:28:45,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:28:45,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:28:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:28:45,010 INFO L87 Difference]: Start difference. First operand 699 states and 1544 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:47,021 INFO L93 Difference]: Finished difference Result 1327 states and 2852 transitions. [2021-08-06 15:28:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:28:47,021 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:28:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:47,025 INFO L225 Difference]: With dead ends: 1327 [2021-08-06 15:28:47,025 INFO L226 Difference]: Without dead ends: 1288 [2021-08-06 15:28:47,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1609.3ms TimeCoverageRelationStatistics Valid=601, Invalid=3955, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:28:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-08-06 15:28:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 759. [2021-08-06 15:28:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.232189973614776) internal successors, (1692), 758 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1692 transitions. [2021-08-06 15:28:47,042 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1692 transitions. Word has length 31 [2021-08-06 15:28:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:47,042 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1692 transitions. [2021-08-06 15:28:47,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1692 transitions. [2021-08-06 15:28:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:28:47,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:47,044 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:47,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:47,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 15:28:47,261 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1268405341, now seen corresponding path program 26 times [2021-08-06 15:28:47,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:47,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720341868] [2021-08-06 15:28:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:47,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:47,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:47,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720341868] [2021-08-06 15:28:47,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720341868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:47,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654456573] [2021-08-06 15:28:47,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:47,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:47,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:47,509 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:47,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:28:48,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:48,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:48,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:28:48,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:48,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654456573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:48,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:48,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-08-06 15:28:48,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339215576] [2021-08-06 15:28:48,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:28:48,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:28:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:48,582 INFO L87 Difference]: Start difference. First operand 759 states and 1692 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:50,105 INFO L93 Difference]: Finished difference Result 1552 states and 3337 transitions. [2021-08-06 15:28:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:28:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:28:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:50,110 INFO L225 Difference]: With dead ends: 1552 [2021-08-06 15:28:50,110 INFO L226 Difference]: Without dead ends: 1495 [2021-08-06 15:28:50,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1265.9ms TimeCoverageRelationStatistics Valid=877, Invalid=4673, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:28:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-08-06 15:28:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 770. [2021-08-06 15:28:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.235370611183355) internal successors, (1719), 769 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1719 transitions. [2021-08-06 15:28:50,127 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1719 transitions. Word has length 31 [2021-08-06 15:28:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:50,127 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1719 transitions. [2021-08-06 15:28:50,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1719 transitions. [2021-08-06 15:28:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:28:50,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:50,129 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:50,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 15:28:50,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 15:28:50,346 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash -883270361, now seen corresponding path program 27 times [2021-08-06 15:28:50,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:50,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689645065] [2021-08-06 15:28:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:50,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:50,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:50,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689645065] [2021-08-06 15:28:50,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689645065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:50,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022720956] [2021-08-06 15:28:50,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:50,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:50,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:50,737 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:50,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:28:51,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:28:51,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:51,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:52,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022720956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:52,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:52,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:28:52,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803011276] [2021-08-06 15:28:52,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:28:52,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:28:52,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:28:52,139 INFO L87 Difference]: Start difference. First operand 770 states and 1719 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:55,618 INFO L93 Difference]: Finished difference Result 1474 states and 3195 transitions. [2021-08-06 15:28:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 15:28:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:28:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:55,623 INFO L225 Difference]: With dead ends: 1474 [2021-08-06 15:28:55,623 INFO L226 Difference]: Without dead ends: 1399 [2021-08-06 15:28:55,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 2943.4ms TimeCoverageRelationStatistics Valid=869, Invalid=6963, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 15:28:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-08-06 15:28:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 820. [2021-08-06 15:28:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 2.230769230769231) internal successors, (1827), 819 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1827 transitions. [2021-08-06 15:28:55,640 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1827 transitions. Word has length 31 [2021-08-06 15:28:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:55,640 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1827 transitions. [2021-08-06 15:28:55,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1827 transitions. [2021-08-06 15:28:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:28:55,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:55,642 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:55,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:55,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 15:28:55,857 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:28:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1802941657, now seen corresponding path program 28 times [2021-08-06 15:28:55,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:55,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080060443] [2021-08-06 15:28:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:55,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:56,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:56,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080060443] [2021-08-06 15:28:56,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080060443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:56,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786476244] [2021-08-06 15:28:56,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:56,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:56,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:56,176 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:28:56,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:28:56,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:56,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:57,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786476244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:57,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:57,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:28:57,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909413685] [2021-08-06 15:28:57,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:28:57,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:28:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:28:57,655 INFO L87 Difference]: Start difference. First operand 820 states and 1827 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:01,514 INFO L93 Difference]: Finished difference Result 1685 states and 3593 transitions. [2021-08-06 15:29:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 15:29:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:29:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:01,520 INFO L225 Difference]: With dead ends: 1685 [2021-08-06 15:29:01,520 INFO L226 Difference]: Without dead ends: 1613 [2021-08-06 15:29:01,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 3359.8ms TimeCoverageRelationStatistics Valid=1097, Invalid=8605, Unknown=0, NotChecked=0, Total=9702 [2021-08-06 15:29:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-08-06 15:29:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 840. [2021-08-06 15:29:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.226460071513707) internal successors, (1868), 839 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1868 transitions. [2021-08-06 15:29:01,536 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1868 transitions. Word has length 31 [2021-08-06 15:29:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:01,537 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1868 transitions. [2021-08-06 15:29:01,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1868 transitions. [2021-08-06 15:29:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:29:01,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:01,538 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:01,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:01,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:01,745 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1242933977, now seen corresponding path program 29 times [2021-08-06 15:29:01,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:01,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802054202] [2021-08-06 15:29:01,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:01,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:02,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:02,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802054202] [2021-08-06 15:29:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802054202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:02,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983857581] [2021-08-06 15:29:02,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:02,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:02,012 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:02,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:29:02,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:29:02,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:29:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:03,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983857581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:03,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:03,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-06 15:29:03,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438458344] [2021-08-06 15:29:03,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:29:03,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:29:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:29:03,469 INFO L87 Difference]: Start difference. First operand 840 states and 1868 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:06,245 INFO L93 Difference]: Finished difference Result 1917 states and 4040 transitions. [2021-08-06 15:29:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 15:29:06,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:29:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:06,252 INFO L225 Difference]: With dead ends: 1917 [2021-08-06 15:29:06,252 INFO L226 Difference]: Without dead ends: 1847 [2021-08-06 15:29:06,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2246 ImplicationChecksByTransitivity, 2374.0ms TimeCoverageRelationStatistics Valid=834, Invalid=6648, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 15:29:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-08-06 15:29:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 908. [2021-08-06 15:29:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.2381477398015437) internal successors, (2030), 907 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2030 transitions. [2021-08-06 15:29:06,272 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2030 transitions. Word has length 31 [2021-08-06 15:29:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:06,272 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2030 transitions. [2021-08-06 15:29:06,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2030 transitions. [2021-08-06 15:29:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:29:06,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:06,274 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:06,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 15:29:06,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:06,489 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1947749671, now seen corresponding path program 30 times [2021-08-06 15:29:06,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:06,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875711514] [2021-08-06 15:29:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:06,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:06,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875711514] [2021-08-06 15:29:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875711514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099776923] [2021-08-06 15:29:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:06,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:06,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:06,693 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:06,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:29:07,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:29:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:29:07,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:08,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099776923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:08,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:08,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 15:29:08,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169265055] [2021-08-06 15:29:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:29:08,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:29:08,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:29:08,345 INFO L87 Difference]: Start difference. First operand 908 states and 2030 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:09,343 INFO L93 Difference]: Finished difference Result 2256 states and 4920 transitions. [2021-08-06 15:29:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:29:09,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:29:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:09,348 INFO L225 Difference]: With dead ends: 2256 [2021-08-06 15:29:09,348 INFO L226 Difference]: Without dead ends: 2223 [2021-08-06 15:29:09,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=714, Invalid=2592, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:29:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-08-06 15:29:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1222. [2021-08-06 15:29:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.2972972972972974) internal successors, (2805), 1221 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 2805 transitions. [2021-08-06 15:29:09,367 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 2805 transitions. Word has length 31 [2021-08-06 15:29:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:09,367 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 2805 transitions. [2021-08-06 15:29:09,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 2805 transitions. [2021-08-06 15:29:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:29:09,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:09,369 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:09,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 15:29:09,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 15:29:09,579 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1217383761, now seen corresponding path program 31 times [2021-08-06 15:29:09,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:09,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468581614] [2021-08-06 15:29:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:09,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:09,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:09,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468581614] [2021-08-06 15:29:09,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468581614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:09,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925227532] [2021-08-06 15:29:09,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:09,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:09,753 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:09,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:29:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:29:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:11,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925227532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:11,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:11,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 15:29:11,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004057615] [2021-08-06 15:29:11,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:29:11,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:29:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:29:11,445 INFO L87 Difference]: Start difference. First operand 1222 states and 2805 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:12,610 INFO L93 Difference]: Finished difference Result 2306 states and 5100 transitions. [2021-08-06 15:29:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:29:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 31 [2021-08-06 15:29:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:12,614 INFO L225 Difference]: With dead ends: 2306 [2021-08-06 15:29:12,614 INFO L226 Difference]: Without dead ends: 2302 [2021-08-06 15:29:12,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1088.0ms TimeCoverageRelationStatistics Valid=691, Invalid=2849, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:29:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-08-06 15:29:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1303. [2021-08-06 15:29:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 2.3179723502304146) internal successors, (3018), 1302 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 3018 transitions. [2021-08-06 15:29:12,640 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 3018 transitions. Word has length 31 [2021-08-06 15:29:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:12,640 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 3018 transitions. [2021-08-06 15:29:12,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 3018 transitions. [2021-08-06 15:29:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:29:12,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:12,642 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:12,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:12,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:12,843 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:12,843 INFO L82 PathProgramCache]: Analyzing trace with hash -14411039, now seen corresponding path program 32 times [2021-08-06 15:29:12,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:12,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964629709] [2021-08-06 15:29:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:12,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:13,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:13,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964629709] [2021-08-06 15:29:13,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964629709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:13,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283997527] [2021-08-06 15:29:13,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:29:13,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:13,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:13,182 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:13,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:29:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:29:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:29:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:14,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283997527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:14,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:14,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:29:14,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984223169] [2021-08-06 15:29:14,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:29:14,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:29:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:29:14,772 INFO L87 Difference]: Start difference. First operand 1303 states and 3018 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:17,364 INFO L93 Difference]: Finished difference Result 1872 states and 4225 transitions. [2021-08-06 15:29:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:29:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:29:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:17,368 INFO L225 Difference]: With dead ends: 1872 [2021-08-06 15:29:17,368 INFO L226 Difference]: Without dead ends: 1824 [2021-08-06 15:29:17,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 2262.3ms TimeCoverageRelationStatistics Valid=605, Invalid=4507, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:29:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-08-06 15:29:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1287. [2021-08-06 15:29:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.315707620528771) internal successors, (2978), 1286 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2978 transitions. [2021-08-06 15:29:17,384 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2978 transitions. Word has length 31 [2021-08-06 15:29:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:17,384 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 2978 transitions. [2021-08-06 15:29:17,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2978 transitions. [2021-08-06 15:29:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:29:17,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:17,386 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:17,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:17,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:17,587 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:17,587 INFO L82 PathProgramCache]: Analyzing trace with hash -460810695, now seen corresponding path program 33 times [2021-08-06 15:29:17,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:17,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505648813] [2021-08-06 15:29:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:17,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:17,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:17,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505648813] [2021-08-06 15:29:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505648813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:17,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475716178] [2021-08-06 15:29:17,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:17,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:17,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:17,885 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:17,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:29:18,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:29:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:18,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:29:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:19,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475716178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:19,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:19,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-06 15:29:19,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722611177] [2021-08-06 15:29:19,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:29:19,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:29:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:29:19,534 INFO L87 Difference]: Start difference. First operand 1287 states and 2978 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:22,660 INFO L93 Difference]: Finished difference Result 3032 states and 6647 transitions. [2021-08-06 15:29:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:29:22,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:29:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:22,666 INFO L225 Difference]: With dead ends: 3032 [2021-08-06 15:29:22,666 INFO L226 Difference]: Without dead ends: 2987 [2021-08-06 15:29:22,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 2595.9ms TimeCoverageRelationStatistics Valid=917, Invalid=5725, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 15:29:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2021-08-06 15:29:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 1429. [2021-08-06 15:29:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 2.3116246498599438) internal successors, (3301), 1428 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 3301 transitions. [2021-08-06 15:29:22,687 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 3301 transitions. Word has length 31 [2021-08-06 15:29:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:22,687 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 3301 transitions. [2021-08-06 15:29:22,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 3301 transitions. [2021-08-06 15:29:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:29:22,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:22,688 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:22,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:22,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 15:29:22,889 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash -74939733, now seen corresponding path program 34 times [2021-08-06 15:29:22,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:22,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948415340] [2021-08-06 15:29:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:22,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:23,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:23,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948415340] [2021-08-06 15:29:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948415340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:23,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593563126] [2021-08-06 15:29:23,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:29:23,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:23,203 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:23,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:29:24,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:29:24,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:29:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:24,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593563126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:24,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:24,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:29:24,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101602497] [2021-08-06 15:29:24,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:29:24,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:24,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:29:24,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:29:24,974 INFO L87 Difference]: Start difference. First operand 1429 states and 3301 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:29,279 INFO L93 Difference]: Finished difference Result 2964 states and 6524 transitions. [2021-08-06 15:29:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-06 15:29:29,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:29:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:29,286 INFO L225 Difference]: With dead ends: 2964 [2021-08-06 15:29:29,286 INFO L226 Difference]: Without dead ends: 2876 [2021-08-06 15:29:29,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 3674.8ms TimeCoverageRelationStatistics Valid=1262, Invalid=10948, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 15:29:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-08-06 15:29:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1530. [2021-08-06 15:29:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 2.318508829300196) internal successors, (3545), 1529 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 3545 transitions. [2021-08-06 15:29:29,315 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 3545 transitions. Word has length 31 [2021-08-06 15:29:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:29,315 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 3545 transitions. [2021-08-06 15:29:29,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 3545 transitions. [2021-08-06 15:29:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:29:29,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:29,317 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:29,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:29,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 15:29:29,537 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash -994611029, now seen corresponding path program 35 times [2021-08-06 15:29:29,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:29,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436848721] [2021-08-06 15:29:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:29,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:29,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:29,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436848721] [2021-08-06 15:29:29,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436848721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:29,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734741519] [2021-08-06 15:29:29,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:29,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:29,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:29,818 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:29,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:29:30,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:29:30,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:29:30,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:31,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734741519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:31,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:31,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:29:31,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169300363] [2021-08-06 15:29:31,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:29:31,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:31,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:29:31,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:29:31,581 INFO L87 Difference]: Start difference. First operand 1530 states and 3545 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:35,686 INFO L93 Difference]: Finished difference Result 2872 states and 6404 transitions. [2021-08-06 15:29:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 15:29:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:29:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:35,692 INFO L225 Difference]: With dead ends: 2872 [2021-08-06 15:29:35,692 INFO L226 Difference]: Without dead ends: 2818 [2021-08-06 15:29:35,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 3525.4ms TimeCoverageRelationStatistics Valid=1081, Invalid=8621, Unknown=0, NotChecked=0, Total=9702 [2021-08-06 15:29:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-08-06 15:29:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 1623. [2021-08-06 15:29:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.308877928483354) internal successors, (3745), 1622 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 3745 transitions. [2021-08-06 15:29:35,721 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 3745 transitions. Word has length 31 [2021-08-06 15:29:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:35,721 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 3745 transitions. [2021-08-06 15:29:35,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 3745 transitions. [2021-08-06 15:29:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:29:35,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:35,724 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:35,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:35,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:29:35,945 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash -893903665, now seen corresponding path program 36 times [2021-08-06 15:29:35,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:35,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529344501] [2021-08-06 15:29:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:35,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:36,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:36,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529344501] [2021-08-06 15:29:36,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529344501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:36,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837529000] [2021-08-06 15:29:36,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:36,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:36,091 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:36,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:29:37,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:29:37,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:29:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:37,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837529000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:37,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:37,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-06 15:29:37,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166742361] [2021-08-06 15:29:37,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:29:37,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:29:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:29:37,708 INFO L87 Difference]: Start difference. First operand 1623 states and 3745 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:38,777 INFO L93 Difference]: Finished difference Result 2146 states and 4731 transitions. [2021-08-06 15:29:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:29:38,778 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:29:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:38,781 INFO L225 Difference]: With dead ends: 2146 [2021-08-06 15:29:38,781 INFO L226 Difference]: Without dead ends: 2146 [2021-08-06 15:29:38,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 956.0ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:29:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-08-06 15:29:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1637. [2021-08-06 15:29:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.3080684596577017) internal successors, (3776), 1636 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 3776 transitions. [2021-08-06 15:29:38,808 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 3776 transitions. Word has length 33 [2021-08-06 15:29:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:38,808 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 3776 transitions. [2021-08-06 15:29:38,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 3776 transitions. [2021-08-06 15:29:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:29:38,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:38,811 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:38,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:39,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:39,025 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:39,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1039636493, now seen corresponding path program 37 times [2021-08-06 15:29:39,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:39,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643552271] [2021-08-06 15:29:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:39,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:39,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:39,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643552271] [2021-08-06 15:29:39,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643552271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:39,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98217793] [2021-08-06 15:29:39,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:39,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:39,133 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:39,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:29:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:29:40,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:41,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98217793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:41,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:41,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-08-06 15:29:41,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732155339] [2021-08-06 15:29:41,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:29:41,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:29:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:29:41,235 INFO L87 Difference]: Start difference. First operand 1637 states and 3776 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:42,589 INFO L93 Difference]: Finished difference Result 1829 states and 4126 transitions. [2021-08-06 15:29:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:29:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:29:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:42,592 INFO L225 Difference]: With dead ends: 1829 [2021-08-06 15:29:42,592 INFO L226 Difference]: Without dead ends: 1827 [2021-08-06 15:29:42,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1243.7ms TimeCoverageRelationStatistics Valid=801, Invalid=3231, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:29:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-06 15:29:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1637. [2021-08-06 15:29:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.3074572127139366) internal successors, (3775), 1636 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 3775 transitions. [2021-08-06 15:29:42,609 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 3775 transitions. Word has length 33 [2021-08-06 15:29:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:42,609 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 3775 transitions. [2021-08-06 15:29:42,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 3775 transitions. [2021-08-06 15:29:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:29:42,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:42,612 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:42,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:42,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 15:29:42,838 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1943887905, now seen corresponding path program 38 times [2021-08-06 15:29:42,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:42,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302196180] [2021-08-06 15:29:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:42,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:43,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:43,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302196180] [2021-08-06 15:29:43,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302196180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:43,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802251702] [2021-08-06 15:29:43,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:29:43,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:43,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:43,264 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:43,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:29:44,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:29:44,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:44,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:29:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:45,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802251702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:45,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:45,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 15:29:45,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896840127] [2021-08-06 15:29:45,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:29:45,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:29:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:29:45,211 INFO L87 Difference]: Start difference. First operand 1637 states and 3775 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:48,820 INFO L93 Difference]: Finished difference Result 2645 states and 5804 transitions. [2021-08-06 15:29:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:29:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:29:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:48,823 INFO L225 Difference]: With dead ends: 2645 [2021-08-06 15:29:48,823 INFO L226 Difference]: Without dead ends: 2586 [2021-08-06 15:29:48,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 3131.9ms TimeCoverageRelationStatistics Valid=872, Invalid=5934, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 15:29:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-08-06 15:29:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 1682. [2021-08-06 15:29:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 2.303985722784057) internal successors, (3873), 1681 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 3873 transitions. [2021-08-06 15:29:48,845 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 3873 transitions. Word has length 33 [2021-08-06 15:29:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:48,845 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 3873 transitions. [2021-08-06 15:29:48,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 3873 transitions. [2021-08-06 15:29:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:29:48,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:48,851 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:48,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:49,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 15:29:49,068 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2075987041, now seen corresponding path program 39 times [2021-08-06 15:29:49,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:49,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504612484] [2021-08-06 15:29:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:49,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:49,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:49,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504612484] [2021-08-06 15:29:49,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504612484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:49,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902668813] [2021-08-06 15:29:49,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:49,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:49,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:49,296 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:49,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:29:50,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 15:29:50,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:29:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:29:51,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902668813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:51,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:51,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-08-06 15:29:51,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612910032] [2021-08-06 15:29:51,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:29:51,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:29:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:29:51,559 INFO L87 Difference]: Start difference. First operand 1682 states and 3873 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:52,666 INFO L93 Difference]: Finished difference Result 3047 states and 6752 transitions. [2021-08-06 15:29:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:29:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:29:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:52,670 INFO L225 Difference]: With dead ends: 3047 [2021-08-06 15:29:52,670 INFO L226 Difference]: Without dead ends: 3020 [2021-08-06 15:29:52,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1112.1ms TimeCoverageRelationStatistics Valid=630, Invalid=2676, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:29:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2021-08-06 15:29:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 1789. [2021-08-06 15:29:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 2.284675615212528) internal successors, (4085), 1788 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 4085 transitions. [2021-08-06 15:29:52,700 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 4085 transitions. Word has length 33 [2021-08-06 15:29:52,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:52,700 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 4085 transitions. [2021-08-06 15:29:52,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 4085 transitions. [2021-08-06 15:29:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:29:52,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:52,703 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:52,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:52,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:52,921 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1360540837, now seen corresponding path program 40 times [2021-08-06 15:29:52,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:52,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836203289] [2021-08-06 15:29:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:52,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:53,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:53,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836203289] [2021-08-06 15:29:53,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836203289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:53,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144793938] [2021-08-06 15:29:53,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:29:53,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:53,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:53,304 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:53,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:29:54,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:29:54,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:29:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:55,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144793938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:55,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:55,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 15:29:55,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141881121] [2021-08-06 15:29:55,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:29:55,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:29:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:29:55,268 INFO L87 Difference]: Start difference. First operand 1789 states and 4085 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:58,920 INFO L93 Difference]: Finished difference Result 2581 states and 5755 transitions. [2021-08-06 15:29:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:29:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:29:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:58,924 INFO L225 Difference]: With dead ends: 2581 [2021-08-06 15:29:58,924 INFO L226 Difference]: Without dead ends: 2539 [2021-08-06 15:29:58,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 3197.2ms TimeCoverageRelationStatistics Valid=767, Invalid=5239, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 15:29:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-08-06 15:29:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1841. [2021-08-06 15:29:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 2.2755434782608694) internal successors, (4187), 1840 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 4187 transitions. [2021-08-06 15:29:58,953 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 4187 transitions. Word has length 33 [2021-08-06 15:29:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:58,953 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 4187 transitions. [2021-08-06 15:29:58,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 4187 transitions. [2021-08-06 15:29:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:29:58,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:58,956 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:58,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:59,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 15:29:59,182 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:29:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:59,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1970237417, now seen corresponding path program 41 times [2021-08-06 15:29:59,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:59,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258869488] [2021-08-06 15:29:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:59,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:59,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:59,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258869488] [2021-08-06 15:29:59,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258869488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:59,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748985582] [2021-08-06 15:29:59,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:59,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:59,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:59,573 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:59,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:30:00,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:30:00,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:00,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:30:00,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:01,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748985582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:01,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:01,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-08-06 15:30:01,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799744089] [2021-08-06 15:30:01,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:30:01,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:30:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:30:01,662 INFO L87 Difference]: Start difference. First operand 1841 states and 4187 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:04,275 INFO L93 Difference]: Finished difference Result 3004 states and 6627 transitions. [2021-08-06 15:30:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:30:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:30:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:04,280 INFO L225 Difference]: With dead ends: 3004 [2021-08-06 15:30:04,280 INFO L226 Difference]: Without dead ends: 2936 [2021-08-06 15:30:04,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2321.6ms TimeCoverageRelationStatistics Valid=633, Invalid=5219, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 15:30:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2021-08-06 15:30:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2025. [2021-08-06 15:30:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.263833992094862) internal successors, (4582), 2024 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4582 transitions. [2021-08-06 15:30:04,326 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4582 transitions. Word has length 33 [2021-08-06 15:30:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:04,326 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 4582 transitions. [2021-08-06 15:30:04,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4582 transitions. [2021-08-06 15:30:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:30:04,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:04,330 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:04,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:04,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:04,551 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash -420701097, now seen corresponding path program 42 times [2021-08-06 15:30:04,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:04,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424937117] [2021-08-06 15:30:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:04,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:04,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:04,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424937117] [2021-08-06 15:30:04,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424937117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:04,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169632516] [2021-08-06 15:30:04,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:30:04,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:04,728 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:04,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:30:06,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-06 15:30:06,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:06,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:30:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:30:11,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169632516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:11,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:11,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-06 15:30:11,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316547650] [2021-08-06 15:30:11,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:30:11,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:30:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=420, Unknown=2, NotChecked=0, Total=506 [2021-08-06 15:30:11,661 INFO L87 Difference]: Start difference. First operand 2025 states and 4582 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:17,921 INFO L93 Difference]: Finished difference Result 2823 states and 6359 transitions. [2021-08-06 15:30:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:30:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:30:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:17,924 INFO L225 Difference]: With dead ends: 2823 [2021-08-06 15:30:17,924 INFO L226 Difference]: Without dead ends: 2819 [2021-08-06 15:30:17,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 6177.4ms TimeCoverageRelationStatistics Valid=346, Invalid=1811, Unknown=5, NotChecked=0, Total=2162 [2021-08-06 15:30:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-08-06 15:30:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 1921. [2021-08-06 15:30:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 2.2744791666666666) internal successors, (4367), 1920 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 4367 transitions. [2021-08-06 15:30:17,945 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 4367 transitions. Word has length 33 [2021-08-06 15:30:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:17,945 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 4367 transitions. [2021-08-06 15:30:17,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 4367 transitions. [2021-08-06 15:30:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:17,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:17,948 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:17,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:18,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:18,149 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash -971038451, now seen corresponding path program 43 times [2021-08-06 15:30:18,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:18,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748283434] [2021-08-06 15:30:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:18,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:18,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:18,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748283434] [2021-08-06 15:30:18,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748283434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:18,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681249331] [2021-08-06 15:30:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:30:18,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:18,485 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:18,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:30:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:19,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:19,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:20,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681249331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:20,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:20,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:30:20,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612629882] [2021-08-06 15:30:20,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:30:20,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:30:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:30:20,562 INFO L87 Difference]: Start difference. First operand 1921 states and 4367 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:22,446 INFO L93 Difference]: Finished difference Result 2948 states and 6540 transitions. [2021-08-06 15:30:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:30:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:30:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:22,450 INFO L225 Difference]: With dead ends: 2948 [2021-08-06 15:30:22,450 INFO L226 Difference]: Without dead ends: 2867 [2021-08-06 15:30:22,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1486.7ms TimeCoverageRelationStatistics Valid=481, Invalid=3679, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:30:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-08-06 15:30:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 1965. [2021-08-06 15:30:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.2785132382892055) internal successors, (4475), 1964 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 4475 transitions. [2021-08-06 15:30:22,473 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 4475 transitions. Word has length 35 [2021-08-06 15:30:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:22,473 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 4475 transitions. [2021-08-06 15:30:22,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 4475 transitions. [2021-08-06 15:30:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:22,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:22,476 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:22,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:22,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 15:30:22,701 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:22,701 INFO L82 PathProgramCache]: Analyzing trace with hash 194932447, now seen corresponding path program 44 times [2021-08-06 15:30:22,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:22,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060668124] [2021-08-06 15:30:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:22,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:23,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:23,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060668124] [2021-08-06 15:30:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060668124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:23,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128300346] [2021-08-06 15:30:23,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:30:23,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:23,077 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:23,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:30:24,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:30:24,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:25,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128300346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:25,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:25,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:30:25,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752456381] [2021-08-06 15:30:25,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:30:25,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:30:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:30:25,202 INFO L87 Difference]: Start difference. First operand 1965 states and 4475 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:27,769 INFO L93 Difference]: Finished difference Result 3036 states and 6672 transitions. [2021-08-06 15:30:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:30:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:30:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:27,772 INFO L225 Difference]: With dead ends: 3036 [2021-08-06 15:30:27,773 INFO L226 Difference]: Without dead ends: 2964 [2021-08-06 15:30:27,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 2087.7ms TimeCoverageRelationStatistics Valid=654, Invalid=6152, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 15:30:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-08-06 15:30:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2022. [2021-08-06 15:30:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.276100940128649) internal successors, (4600), 2021 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 4600 transitions. [2021-08-06 15:30:27,797 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 4600 transitions. Word has length 35 [2021-08-06 15:30:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:27,797 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 4600 transitions. [2021-08-06 15:30:27,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 4600 transitions. [2021-08-06 15:30:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:27,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:27,799 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:27,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:28,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 15:30:28,000 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1175406047, now seen corresponding path program 45 times [2021-08-06 15:30:28,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:28,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665137607] [2021-08-06 15:30:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:28,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:28,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:28,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665137607] [2021-08-06 15:30:28,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665137607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:28,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458263492] [2021-08-06 15:30:28,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:30:28,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:28,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:28,347 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:28,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:30:29,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:30:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:30,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458263492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:30,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:30,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:30:30,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873330584] [2021-08-06 15:30:30,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:30:30,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:30:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:30:30,523 INFO L87 Difference]: Start difference. First operand 2022 states and 4600 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:33,041 INFO L93 Difference]: Finished difference Result 3013 states and 6649 transitions. [2021-08-06 15:30:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:30:33,046 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:30:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:33,050 INFO L225 Difference]: With dead ends: 3013 [2021-08-06 15:30:33,050 INFO L226 Difference]: Without dead ends: 2950 [2021-08-06 15:30:33,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2066.9ms TimeCoverageRelationStatistics Valid=688, Invalid=5318, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 15:30:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-08-06 15:30:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2047. [2021-08-06 15:30:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.2732160312805476) internal successors, (4651), 2046 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 4651 transitions. [2021-08-06 15:30:33,073 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 4651 transitions. Word has length 35 [2021-08-06 15:30:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:33,074 INFO L470 AbstractCegarLoop]: Abstraction has 2047 states and 4651 transitions. [2021-08-06 15:30:33,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 4651 transitions. [2021-08-06 15:30:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:33,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:33,077 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:33,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:33,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 15:30:33,285 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1154079967, now seen corresponding path program 46 times [2021-08-06 15:30:33,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:33,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906607166] [2021-08-06 15:30:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:33,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:33,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:33,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906607166] [2021-08-06 15:30:33,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906607166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:33,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786734175] [2021-08-06 15:30:33,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:30:33,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:33,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:33,665 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:33,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:30:35,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:30:35,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:35,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:35,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786734175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:35,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:35,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:30:35,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534790702] [2021-08-06 15:30:35,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:30:35,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:35,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:30:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:30:35,924 INFO L87 Difference]: Start difference. First operand 2047 states and 4651 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:38,289 INFO L93 Difference]: Finished difference Result 3030 states and 6716 transitions. [2021-08-06 15:30:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:30:38,290 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:30:38,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:38,293 INFO L225 Difference]: With dead ends: 3030 [2021-08-06 15:30:38,293 INFO L226 Difference]: Without dead ends: 2979 [2021-08-06 15:30:38,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 1973.9ms TimeCoverageRelationStatistics Valid=703, Invalid=4847, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:30:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2021-08-06 15:30:38,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2078. [2021-08-06 15:30:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 2.2729898892633607) internal successors, (4721), 2077 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 4721 transitions. [2021-08-06 15:30:38,317 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 4721 transitions. Word has length 35 [2021-08-06 15:30:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:38,317 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 4721 transitions. [2021-08-06 15:30:38,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 4721 transitions. [2021-08-06 15:30:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:38,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:38,321 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:38,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 15:30:38,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:38,547 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 255734751, now seen corresponding path program 47 times [2021-08-06 15:30:38,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:38,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533314927] [2021-08-06 15:30:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:38,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:38,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:38,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533314927] [2021-08-06 15:30:38,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533314927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:38,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626964395] [2021-08-06 15:30:38,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:30:38,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:38,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:38,915 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:38,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:30:40,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:30:40,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:40,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:30:40,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:41,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626964395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:41,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:41,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:30:41,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600415732] [2021-08-06 15:30:41,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:30:41,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:30:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:30:41,391 INFO L87 Difference]: Start difference. First operand 2078 states and 4721 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:44,037 INFO L93 Difference]: Finished difference Result 3232 states and 7125 transitions. [2021-08-06 15:30:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:30:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:30:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:44,042 INFO L225 Difference]: With dead ends: 3232 [2021-08-06 15:30:44,042 INFO L226 Difference]: Without dead ends: 3190 [2021-08-06 15:30:44,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 2163.9ms TimeCoverageRelationStatistics Valid=763, Invalid=5399, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:30:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-08-06 15:30:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2109. [2021-08-06 15:30:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 2.273719165085389) internal successors, (4793), 2108 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 4793 transitions. [2021-08-06 15:30:44,067 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 4793 transitions. Word has length 35 [2021-08-06 15:30:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:44,068 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 4793 transitions. [2021-08-06 15:30:44,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 4793 transitions. [2021-08-06 15:30:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:44,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:44,070 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:44,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:44,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 15:30:44,271 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:44,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash -925087009, now seen corresponding path program 48 times [2021-08-06 15:30:44,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:44,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803629413] [2021-08-06 15:30:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:44,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:44,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:44,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803629413] [2021-08-06 15:30:44,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803629413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:44,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109508564] [2021-08-06 15:30:44,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:30:44,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:44,596 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:44,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:30:46,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:30:46,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 15:30:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:46,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109508564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:46,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:46,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:30:46,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485787782] [2021-08-06 15:30:46,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:30:46,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:46,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:30:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:30:46,677 INFO L87 Difference]: Start difference. First operand 2109 states and 4793 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:49,195 INFO L93 Difference]: Finished difference Result 3607 states and 7965 transitions. [2021-08-06 15:30:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 15:30:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:30:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:49,200 INFO L225 Difference]: With dead ends: 3607 [2021-08-06 15:30:49,200 INFO L226 Difference]: Without dead ends: 3547 [2021-08-06 15:30:49,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 1995.7ms TimeCoverageRelationStatistics Valid=1405, Invalid=9101, Unknown=0, NotChecked=0, Total=10506 [2021-08-06 15:30:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-08-06 15:30:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2279. [2021-08-06 15:30:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 2.3072870939420542) internal successors, (5256), 2278 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 5256 transitions. [2021-08-06 15:30:49,226 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 5256 transitions. Word has length 35 [2021-08-06 15:30:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:49,226 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 5256 transitions. [2021-08-06 15:30:49,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 5256 transitions. [2021-08-06 15:30:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:49,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:49,228 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:49,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:49,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 15:30:49,429 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1003263075, now seen corresponding path program 49 times [2021-08-06 15:30:49,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:49,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195982469] [2021-08-06 15:30:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:49,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:49,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:49,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195982469] [2021-08-06 15:30:49,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195982469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:49,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737888078] [2021-08-06 15:30:49,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:30:49,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:49,865 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:49,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:30:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:51,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:52,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737888078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:52,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:52,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:30:52,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873748622] [2021-08-06 15:30:52,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:30:52,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:52,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:30:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:30:52,355 INFO L87 Difference]: Start difference. First operand 2279 states and 5256 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:57,249 INFO L93 Difference]: Finished difference Result 3800 states and 8417 transitions. [2021-08-06 15:30:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-06 15:30:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:30:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:57,254 INFO L225 Difference]: With dead ends: 3800 [2021-08-06 15:30:57,254 INFO L226 Difference]: Without dead ends: 3701 [2021-08-06 15:30:57,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3987 ImplicationChecksByTransitivity, 4153.9ms TimeCoverageRelationStatistics Valid=1257, Invalid=11399, Unknown=0, NotChecked=0, Total=12656 [2021-08-06 15:30:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-08-06 15:30:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2371. [2021-08-06 15:30:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 2.308016877637131) internal successors, (5470), 2370 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 5470 transitions. [2021-08-06 15:30:57,294 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 5470 transitions. Word has length 35 [2021-08-06 15:30:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:57,294 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 5470 transitions. [2021-08-06 15:30:57,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 5470 transitions. [2021-08-06 15:30:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:30:57,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:57,297 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:57,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:57,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:57,498 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:30:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1962410595, now seen corresponding path program 50 times [2021-08-06 15:30:57,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:57,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388649800] [2021-08-06 15:30:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:57,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:57,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:57,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388649800] [2021-08-06 15:30:57,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388649800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:57,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312873351] [2021-08-06 15:30:57,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:30:57,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:57,865 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:57,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:30:59,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:30:59,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312873351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:00,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:00,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:31:00,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842355192] [2021-08-06 15:31:00,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:31:00,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:00,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:31:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:31:00,285 INFO L87 Difference]: Start difference. First operand 2371 states and 5470 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:04,666 INFO L93 Difference]: Finished difference Result 3747 states and 8351 transitions. [2021-08-06 15:31:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 15:31:04,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:04,672 INFO L225 Difference]: With dead ends: 3747 [2021-08-06 15:31:04,673 INFO L226 Difference]: Without dead ends: 3681 [2021-08-06 15:31:04,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3522 ImplicationChecksByTransitivity, 3827.4ms TimeCoverageRelationStatistics Valid=1251, Invalid=10091, Unknown=0, NotChecked=0, Total=11342 [2021-08-06 15:31:04,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-08-06 15:31:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 2405. [2021-08-06 15:31:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 2.3065723793677204) internal successors, (5545), 2404 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 5545 transitions. [2021-08-06 15:31:04,718 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 5545 transitions. Word has length 35 [2021-08-06 15:31:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:04,718 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 5545 transitions. [2021-08-06 15:31:04,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 5545 transitions. [2021-08-06 15:31:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:04,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:04,722 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:04,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 15:31:04,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 15:31:04,937 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1064065379, now seen corresponding path program 51 times [2021-08-06 15:31:04,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:04,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379761999] [2021-08-06 15:31:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:04,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:05,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379761999] [2021-08-06 15:31:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379761999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812347960] [2021-08-06 15:31:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:31:05,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:05,338 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:05,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:31:07,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:31:07,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 15:31:07,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:08,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812347960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:08,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:08,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-06 15:31:08,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794764732] [2021-08-06 15:31:08,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:31:08,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:31:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:31:08,580 INFO L87 Difference]: Start difference. First operand 2405 states and 5545 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:12,284 INFO L93 Difference]: Finished difference Result 4267 states and 9511 transitions. [2021-08-06 15:31:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 15:31:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:12,289 INFO L225 Difference]: With dead ends: 4267 [2021-08-06 15:31:12,289 INFO L226 Difference]: Without dead ends: 4189 [2021-08-06 15:31:12,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 3477.0ms TimeCoverageRelationStatistics Valid=1449, Invalid=8057, Unknown=0, NotChecked=0, Total=9506 [2021-08-06 15:31:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-08-06 15:31:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 2519. [2021-08-06 15:31:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 2.301032565528197) internal successors, (5794), 2518 states have internal predecessors, (5794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 5794 transitions. [2021-08-06 15:31:12,320 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 5794 transitions. Word has length 35 [2021-08-06 15:31:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:12,320 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 5794 transitions. [2021-08-06 15:31:12,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 5794 transitions. [2021-08-06 15:31:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:12,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:12,323 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:12,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:12,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:12,524 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1738015509, now seen corresponding path program 52 times [2021-08-06 15:31:12,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:12,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254507686] [2021-08-06 15:31:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:12,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:12,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:12,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254507686] [2021-08-06 15:31:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254507686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:12,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477739335] [2021-08-06 15:31:12,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:31:12,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:12,925 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:12,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:31:14,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:31:14,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:14,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:15,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477739335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:15,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:15,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 15:31:15,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036902553] [2021-08-06 15:31:15,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:31:15,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:31:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:31:15,518 INFO L87 Difference]: Start difference. First operand 2519 states and 5794 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:20,792 INFO L93 Difference]: Finished difference Result 4904 states and 10743 transitions. [2021-08-06 15:31:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 15:31:20,792 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:20,798 INFO L225 Difference]: With dead ends: 4904 [2021-08-06 15:31:20,798 INFO L226 Difference]: Without dead ends: 4832 [2021-08-06 15:31:20,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 4376.6ms TimeCoverageRelationStatistics Valid=1761, Invalid=13245, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 15:31:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2021-08-06 15:31:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 2663. [2021-08-06 15:31:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 2.3012772351615327) internal successors, (6126), 2662 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 6126 transitions. [2021-08-06 15:31:20,836 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 6126 transitions. Word has length 35 [2021-08-06 15:31:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:20,836 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 6126 transitions. [2021-08-06 15:31:20,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 6126 transitions. [2021-08-06 15:31:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:20,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:20,839 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:20,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:21,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-06 15:31:21,039 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:21,040 INFO L82 PathProgramCache]: Analyzing trace with hash -997421313, now seen corresponding path program 53 times [2021-08-06 15:31:21,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:21,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247510392] [2021-08-06 15:31:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:21,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:21,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:21,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247510392] [2021-08-06 15:31:21,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247510392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:21,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709374465] [2021-08-06 15:31:21,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:31:21,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:21,457 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:21,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:31:23,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:31:23,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:24,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709374465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:24,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:24,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 15:31:24,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435236916] [2021-08-06 15:31:24,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:31:24,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:31:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:31:24,182 INFO L87 Difference]: Start difference. First operand 2663 states and 6126 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:29,189 INFO L93 Difference]: Finished difference Result 5857 states and 12707 transitions. [2021-08-06 15:31:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 15:31:29,189 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:29,196 INFO L225 Difference]: With dead ends: 5857 [2021-08-06 15:31:29,197 INFO L226 Difference]: Without dead ends: 5812 [2021-08-06 15:31:29,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4287 ImplicationChecksByTransitivity, 4170.5ms TimeCoverageRelationStatistics Valid=1475, Invalid=11865, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 15:31:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-08-06 15:31:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 2795. [2021-08-06 15:31:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 2.3113815318539728) internal successors, (6458), 2794 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 6458 transitions. [2021-08-06 15:31:29,254 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 6458 transitions. Word has length 35 [2021-08-06 15:31:29,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:29,254 INFO L470 AbstractCegarLoop]: Abstraction has 2795 states and 6458 transitions. [2021-08-06 15:31:29,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 6458 transitions. [2021-08-06 15:31:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:29,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:29,257 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:29,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:29,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 15:31:29,458 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1036088221, now seen corresponding path program 54 times [2021-08-06 15:31:29,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:29,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996161611] [2021-08-06 15:31:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:29,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:29,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:29,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996161611] [2021-08-06 15:31:29,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996161611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:29,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868114090] [2021-08-06 15:31:29,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:31:29,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:29,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:29,861 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:29,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:31:31,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:31:31,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:32,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868114090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:32,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:32,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 15:31:32,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859614253] [2021-08-06 15:31:32,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:31:32,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:32,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:31:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:31:32,491 INFO L87 Difference]: Start difference. First operand 2795 states and 6458 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:36,460 INFO L93 Difference]: Finished difference Result 4172 states and 9367 transitions. [2021-08-06 15:31:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 15:31:36,460 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:36,466 INFO L225 Difference]: With dead ends: 4172 [2021-08-06 15:31:36,466 INFO L226 Difference]: Without dead ends: 4097 [2021-08-06 15:31:36,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 3350.0ms TimeCoverageRelationStatistics Valid=1046, Invalid=8854, Unknown=0, NotChecked=0, Total=9900 [2021-08-06 15:31:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-08-06 15:31:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 2843. [2021-08-06 15:31:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2842 states have (on average 2.3089373680506684) internal successors, (6562), 2842 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 6562 transitions. [2021-08-06 15:31:36,510 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 6562 transitions. Word has length 35 [2021-08-06 15:31:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:36,510 INFO L470 AbstractCegarLoop]: Abstraction has 2843 states and 6562 transitions. [2021-08-06 15:31:36,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 6562 transitions. [2021-08-06 15:31:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:36,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:36,514 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:36,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:36,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:36,737 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1955759517, now seen corresponding path program 55 times [2021-08-06 15:31:36,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:36,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820952970] [2021-08-06 15:31:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:36,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:37,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:37,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820952970] [2021-08-06 15:31:37,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820952970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:37,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351357304] [2021-08-06 15:31:37,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:37,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:37,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:37,106 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:37,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:31:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:38,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:38,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:39,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351357304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:39,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:39,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 15:31:39,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384291297] [2021-08-06 15:31:39,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:31:39,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:31:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:31:39,785 INFO L87 Difference]: Start difference. First operand 2843 states and 6562 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:44,291 INFO L93 Difference]: Finished difference Result 4440 states and 9877 transitions. [2021-08-06 15:31:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 15:31:44,292 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:44,297 INFO L225 Difference]: With dead ends: 4440 [2021-08-06 15:31:44,297 INFO L226 Difference]: Without dead ends: 4370 [2021-08-06 15:31:44,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 3914.1ms TimeCoverageRelationStatistics Valid=1385, Invalid=10825, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 15:31:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-08-06 15:31:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 2863. [2021-08-06 15:31:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.307477288609364) internal successors, (6604), 2862 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 6604 transitions. [2021-08-06 15:31:44,329 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 6604 transitions. Word has length 35 [2021-08-06 15:31:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:44,329 INFO L470 AbstractCegarLoop]: Abstraction has 2863 states and 6604 transitions. [2021-08-06 15:31:44,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 6604 transitions. [2021-08-06 15:31:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:44,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:44,332 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:44,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:44,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:44,533 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:44,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1395751837, now seen corresponding path program 56 times [2021-08-06 15:31:44,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:44,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668937889] [2021-08-06 15:31:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:44,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:44,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:44,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668937889] [2021-08-06 15:31:44,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668937889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:44,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139033380] [2021-08-06 15:31:44,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:31:44,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:44,890 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:44,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:31:46,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:31:46,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:46,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:47,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139033380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:47,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:47,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 15:31:47,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127270703] [2021-08-06 15:31:47,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:31:47,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:31:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:31:47,630 INFO L87 Difference]: Start difference. First operand 2863 states and 6604 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:51,581 INFO L93 Difference]: Finished difference Result 5597 states and 12376 transitions. [2021-08-06 15:31:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 15:31:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:51,588 INFO L225 Difference]: With dead ends: 5597 [2021-08-06 15:31:51,588 INFO L226 Difference]: Without dead ends: 5510 [2021-08-06 15:31:51,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 3290.7ms TimeCoverageRelationStatistics Valid=1092, Invalid=8028, Unknown=0, NotChecked=0, Total=9120 [2021-08-06 15:31:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-08-06 15:31:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 3014. [2021-08-06 15:31:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 2.3056754065715235) internal successors, (6947), 3013 states have internal predecessors, (6947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 6947 transitions. [2021-08-06 15:31:51,651 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 6947 transitions. Word has length 35 [2021-08-06 15:31:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:51,651 INFO L470 AbstractCegarLoop]: Abstraction has 3014 states and 6947 transitions. [2021-08-06 15:31:51,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 6947 transitions. [2021-08-06 15:31:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:51,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:51,655 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:51,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:51,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:51,869 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1794931811, now seen corresponding path program 57 times [2021-08-06 15:31:51,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:51,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802470469] [2021-08-06 15:31:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:51,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:52,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:52,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802470469] [2021-08-06 15:31:52,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802470469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:52,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135961962] [2021-08-06 15:31:52,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:31:52,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:52,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:52,153 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:52,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:31:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 15:31:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 15:31:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:55,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135961962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:55,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:55,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 15:31:55,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608968685] [2021-08-06 15:31:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:31:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:31:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:31:55,318 INFO L87 Difference]: Start difference. First operand 3014 states and 6947 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:56,896 INFO L93 Difference]: Finished difference Result 5673 states and 12771 transitions. [2021-08-06 15:31:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:31:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:31:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:56,903 INFO L225 Difference]: With dead ends: 5673 [2021-08-06 15:31:56,903 INFO L226 Difference]: Without dead ends: 5643 [2021-08-06 15:31:56,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1427.7ms TimeCoverageRelationStatistics Valid=757, Invalid=3533, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:31:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2021-08-06 15:31:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 3173. [2021-08-06 15:31:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 2.310844892812106) internal successors, (7330), 3172 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 7330 transitions. [2021-08-06 15:31:56,943 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 7330 transitions. Word has length 35 [2021-08-06 15:31:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:56,943 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 7330 transitions. [2021-08-06 15:31:56,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 7330 transitions. [2021-08-06 15:31:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:31:56,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:56,947 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:56,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:57,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 15:31:57,147 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:31:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1064565901, now seen corresponding path program 58 times [2021-08-06 15:31:57,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:57,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437503811] [2021-08-06 15:31:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:57,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:57,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:57,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437503811] [2021-08-06 15:31:57,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437503811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:57,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728132150] [2021-08-06 15:31:57,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:31:57,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:57,392 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:57,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:31:59,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:31:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:31:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:00,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728132150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:00,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:00,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:32:00,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462729839] [2021-08-06 15:32:00,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:32:00,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:32:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:32:00,582 INFO L87 Difference]: Start difference. First operand 3173 states and 7330 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:02,077 INFO L93 Difference]: Finished difference Result 5741 states and 13104 transitions. [2021-08-06 15:32:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:32:02,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:02,084 INFO L225 Difference]: With dead ends: 5741 [2021-08-06 15:32:02,084 INFO L226 Difference]: Without dead ends: 5735 [2021-08-06 15:32:02,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1378.9ms TimeCoverageRelationStatistics Valid=717, Invalid=3315, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:32:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5735 states. [2021-08-06 15:32:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5735 to 3482. [2021-08-06 15:32:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3481 states have (on average 2.331226659006033) internal successors, (8115), 3481 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 8115 transitions. [2021-08-06 15:32:02,127 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 8115 transitions. Word has length 35 [2021-08-06 15:32:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:02,127 INFO L470 AbstractCegarLoop]: Abstraction has 3482 states and 8115 transitions. [2021-08-06 15:32:02,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 8115 transitions. [2021-08-06 15:32:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:02,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:02,130 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:02,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:02,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 15:32:02,331 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:02,331 INFO L82 PathProgramCache]: Analyzing trace with hash 239983841, now seen corresponding path program 59 times [2021-08-06 15:32:02,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:02,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721987333] [2021-08-06 15:32:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:02,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:32:02,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:02,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721987333] [2021-08-06 15:32:02,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721987333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:02,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044628862] [2021-08-06 15:32:02,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:32:02,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:02,685 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:02,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:32:04,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:32:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 15:32:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044628862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:06,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:06,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-06 15:32:06,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955883149] [2021-08-06 15:32:06,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:32:06,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:32:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:32:06,250 INFO L87 Difference]: Start difference. First operand 3482 states and 8115 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:09,023 INFO L93 Difference]: Finished difference Result 4992 states and 11383 transitions. [2021-08-06 15:32:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:32:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:09,029 INFO L225 Difference]: With dead ends: 4992 [2021-08-06 15:32:09,030 INFO L226 Difference]: Without dead ends: 4908 [2021-08-06 15:32:09,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 2511.9ms TimeCoverageRelationStatistics Valid=794, Invalid=5212, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 15:32:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4908 states. [2021-08-06 15:32:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4908 to 3519. [2021-08-06 15:32:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 2.328595793064241) internal successors, (8192), 3518 states have internal predecessors, (8192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 8192 transitions. [2021-08-06 15:32:09,094 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 8192 transitions. Word has length 35 [2021-08-06 15:32:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:09,094 INFO L470 AbstractCegarLoop]: Abstraction has 3519 states and 8192 transitions. [2021-08-06 15:32:09,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 8192 transitions. [2021-08-06 15:32:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:09,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:09,098 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:09,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 15:32:09,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:09,298 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:09,299 INFO L82 PathProgramCache]: Analyzing trace with hash 419916007, now seen corresponding path program 60 times [2021-08-06 15:32:09,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:09,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825068731] [2021-08-06 15:32:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:09,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:09,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:09,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825068731] [2021-08-06 15:32:09,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825068731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:09,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826930307] [2021-08-06 15:32:09,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:32:09,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:09,699 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:09,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:32:11,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 15:32:11,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:11,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:12,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826930307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:12,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:12,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:32:12,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916806143] [2021-08-06 15:32:12,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:32:12,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:32:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:32:12,712 INFO L87 Difference]: Start difference. First operand 3519 states and 8192 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:19,063 INFO L93 Difference]: Finished difference Result 5580 states and 12482 transitions. [2021-08-06 15:32:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-06 15:32:19,064 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:19,071 INFO L225 Difference]: With dead ends: 5580 [2021-08-06 15:32:19,071 INFO L226 Difference]: Without dead ends: 5487 [2021-08-06 15:32:19,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5872 ImplicationChecksByTransitivity, 5440.9ms TimeCoverageRelationStatistics Valid=1682, Invalid=15874, Unknown=0, NotChecked=0, Total=17556 [2021-08-06 15:32:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5487 states. [2021-08-06 15:32:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5487 to 3627. [2021-08-06 15:32:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.3309431880860454) internal successors, (8452), 3626 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 8452 transitions. [2021-08-06 15:32:19,150 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 8452 transitions. Word has length 35 [2021-08-06 15:32:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:19,151 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 8452 transitions. [2021-08-06 15:32:19,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 8452 transitions. [2021-08-06 15:32:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:19,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:19,154 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:19,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:19,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:19,355 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1379063527, now seen corresponding path program 61 times [2021-08-06 15:32:19,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:19,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936523954] [2021-08-06 15:32:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:19,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:19,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:19,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936523954] [2021-08-06 15:32:19,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936523954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:19,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432263726] [2021-08-06 15:32:19,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:32:19,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:19,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:19,745 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:19,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:32:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:22,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432263726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:22,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:22,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:32:22,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471968340] [2021-08-06 15:32:22,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:32:22,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:22,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:32:22,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:32:22,763 INFO L87 Difference]: Start difference. First operand 3627 states and 8452 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:27,312 INFO L93 Difference]: Finished difference Result 5009 states and 11403 transitions. [2021-08-06 15:32:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-06 15:32:27,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:27,318 INFO L225 Difference]: With dead ends: 5009 [2021-08-06 15:32:27,318 INFO L226 Difference]: Without dead ends: 4955 [2021-08-06 15:32:27,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3050 ImplicationChecksByTransitivity, 3937.3ms TimeCoverageRelationStatistics Valid=1051, Invalid=9251, Unknown=0, NotChecked=0, Total=10302 [2021-08-06 15:32:27,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2021-08-06 15:32:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 3609. [2021-08-06 15:32:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3608 states have (on average 2.330376940133038) internal successors, (8408), 3608 states have internal predecessors, (8408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 8408 transitions. [2021-08-06 15:32:27,359 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 8408 transitions. Word has length 35 [2021-08-06 15:32:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:27,359 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 8408 transitions. [2021-08-06 15:32:27,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 8408 transitions. [2021-08-06 15:32:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:27,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:27,363 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:27,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:27,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:27,564 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash 480718311, now seen corresponding path program 62 times [2021-08-06 15:32:27,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:27,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044101902] [2021-08-06 15:32:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:27,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:27,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:27,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044101902] [2021-08-06 15:32:27,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044101902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:27,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345787946] [2021-08-06 15:32:27,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:27,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:27,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:27,997 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:28,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:32:30,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:30,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:30,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:31,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345787946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:31,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:31,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:32:31,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029932176] [2021-08-06 15:32:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:32:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:32:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:32:31,173 INFO L87 Difference]: Start difference. First operand 3609 states and 8408 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:37,121 INFO L93 Difference]: Finished difference Result 5641 states and 12648 transitions. [2021-08-06 15:32:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-06 15:32:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:37,128 INFO L225 Difference]: With dead ends: 5641 [2021-08-06 15:32:37,128 INFO L226 Difference]: Without dead ends: 5571 [2021-08-06 15:32:37,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5374 ImplicationChecksByTransitivity, 5064.3ms TimeCoverageRelationStatistics Valid=1631, Invalid=14881, Unknown=0, NotChecked=0, Total=16512 [2021-08-06 15:32:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2021-08-06 15:32:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 3619. [2021-08-06 15:32:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 2.3289110005527918) internal successors, (8426), 3618 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 8426 transitions. [2021-08-06 15:32:37,171 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 8426 transitions. Word has length 35 [2021-08-06 15:32:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:37,171 INFO L470 AbstractCegarLoop]: Abstraction has 3619 states and 8426 transitions. [2021-08-06 15:32:37,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 8426 transitions. [2021-08-06 15:32:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:37,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:37,176 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:37,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:37,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:37,376 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:37,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1211584743, now seen corresponding path program 63 times [2021-08-06 15:32:37,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:37,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535249441] [2021-08-06 15:32:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:37,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:37,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535249441] [2021-08-06 15:32:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535249441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611613853] [2021-08-06 15:32:37,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:37,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:37,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:37,628 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:37,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 15:32:39,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:32:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 15:32:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:41,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611613853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:41,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:41,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:32:41,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509704774] [2021-08-06 15:32:41,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:32:41,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:32:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:32:41,160 INFO L87 Difference]: Start difference. First operand 3619 states and 8426 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:42,979 INFO L93 Difference]: Finished difference Result 7279 states and 16604 transitions. [2021-08-06 15:32:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:32:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:42,989 INFO L225 Difference]: With dead ends: 7279 [2021-08-06 15:32:42,989 INFO L226 Difference]: Without dead ends: 7273 [2021-08-06 15:32:42,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1551.4ms TimeCoverageRelationStatistics Valid=857, Invalid=3835, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 15:32:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2021-08-06 15:32:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 4528. [2021-08-06 15:32:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.365142478462558) internal successors, (10707), 4527 states have internal predecessors, (10707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 10707 transitions. [2021-08-06 15:32:43,045 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 10707 transitions. Word has length 35 [2021-08-06 15:32:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:43,045 INFO L470 AbstractCegarLoop]: Abstraction has 4528 states and 10707 transitions. [2021-08-06 15:32:43,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 10707 transitions. [2021-08-06 15:32:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:43,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:43,050 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:43,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:43,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 15:32:43,250 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:43,251 INFO L82 PathProgramCache]: Analyzing trace with hash 481218833, now seen corresponding path program 64 times [2021-08-06 15:32:43,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:43,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108302018] [2021-08-06 15:32:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:43,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:43,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:43,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108302018] [2021-08-06 15:32:43,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108302018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:43,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321762888] [2021-08-06 15:32:43,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:32:43,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:43,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:43,485 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:43,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 15:32:45,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:32:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:32:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:47,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321762888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:47,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:47,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-06 15:32:47,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018560785] [2021-08-06 15:32:47,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:32:47,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:32:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:32:47,102 INFO L87 Difference]: Start difference. First operand 4528 states and 10707 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:48,716 INFO L93 Difference]: Finished difference Result 6791 states and 15712 transitions. [2021-08-06 15:32:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:32:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:48,725 INFO L225 Difference]: With dead ends: 6791 [2021-08-06 15:32:48,725 INFO L226 Difference]: Without dead ends: 6787 [2021-08-06 15:32:48,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1406.3ms TimeCoverageRelationStatistics Valid=692, Invalid=3340, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:32:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2021-08-06 15:32:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 5119. [2021-08-06 15:32:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5119 states, 5118 states have (on average 2.3780773739742087) internal successors, (12171), 5118 states have internal predecessors, (12171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 12171 transitions. [2021-08-06 15:32:48,799 INFO L78 Accepts]: Start accepts. Automaton has 5119 states and 12171 transitions. Word has length 35 [2021-08-06 15:32:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:48,799 INFO L470 AbstractCegarLoop]: Abstraction has 5119 states and 12171 transitions. [2021-08-06 15:32:48,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:48,799 INFO L276 IsEmpty]: Start isEmpty. Operand 5119 states and 12171 transitions. [2021-08-06 15:32:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:48,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:48,804 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:48,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:49,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:49,005 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash -273268249, now seen corresponding path program 65 times [2021-08-06 15:32:49,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:49,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689457750] [2021-08-06 15:32:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:49,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:49,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:49,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689457750] [2021-08-06 15:32:49,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689457750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:49,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142997454] [2021-08-06 15:32:49,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:32:49,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:49,358 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:49,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 15:32:51,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:32:51,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:51,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:52,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142997454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:52,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:52,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 15:32:52,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492668497] [2021-08-06 15:32:52,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:32:52,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:32:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:32:52,691 INFO L87 Difference]: Start difference. First operand 5119 states and 12171 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:57,831 INFO L93 Difference]: Finished difference Result 8492 states and 19410 transitions. [2021-08-06 15:32:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-06 15:32:57,831 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:32:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:57,843 INFO L225 Difference]: With dead ends: 8492 [2021-08-06 15:32:57,843 INFO L226 Difference]: Without dead ends: 8395 [2021-08-06 15:32:57,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 4267.2ms TimeCoverageRelationStatistics Valid=1425, Invalid=13095, Unknown=0, NotChecked=0, Total=14520 [2021-08-06 15:32:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8395 states. [2021-08-06 15:32:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8395 to 5212. [2021-08-06 15:32:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 5211 states have (on average 2.383035885626559) internal successors, (12418), 5211 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 12418 transitions. [2021-08-06 15:32:57,924 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 12418 transitions. Word has length 35 [2021-08-06 15:32:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:57,924 INFO L470 AbstractCegarLoop]: Abstraction has 5212 states and 12418 transitions. [2021-08-06 15:32:57,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 12418 transitions. [2021-08-06 15:32:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:32:57,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:57,930 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:57,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 15:32:58,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 15:32:58,133 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:32:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1192939545, now seen corresponding path program 66 times [2021-08-06 15:32:58,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:58,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469791564] [2021-08-06 15:32:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:58,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:58,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:58,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469791564] [2021-08-06 15:32:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469791564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:58,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567132897] [2021-08-06 15:32:58,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:32:58,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:58,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:58,491 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:58,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 15:33:01,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:33:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:33:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:01,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567132897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:01,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:01,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 15:33:01,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588926851] [2021-08-06 15:33:01,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:33:01,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:01,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:33:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:33:01,830 INFO L87 Difference]: Start difference. First operand 5212 states and 12418 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:06,773 INFO L93 Difference]: Finished difference Result 7843 states and 18139 transitions. [2021-08-06 15:33:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 15:33:06,773 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:33:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:06,784 INFO L225 Difference]: With dead ends: 7843 [2021-08-06 15:33:06,784 INFO L226 Difference]: Without dead ends: 7789 [2021-08-06 15:33:06,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3207 ImplicationChecksByTransitivity, 4094.8ms TimeCoverageRelationStatistics Valid=1159, Invalid=9553, Unknown=0, NotChecked=0, Total=10712 [2021-08-06 15:33:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2021-08-06 15:33:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 5176. [2021-08-06 15:33:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 2.380289855072464) internal successors, (12318), 5175 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 12318 transitions. [2021-08-06 15:33:06,851 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 12318 transitions. Word has length 35 [2021-08-06 15:33:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:06,852 INFO L470 AbstractCegarLoop]: Abstraction has 5176 states and 12318 transitions. [2021-08-06 15:33:06,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 12318 transitions. [2021-08-06 15:33:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:33:06,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:06,858 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:06,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:07,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 15:33:07,072 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:33:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1827385873, now seen corresponding path program 67 times [2021-08-06 15:33:07,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:07,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416465864] [2021-08-06 15:33:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:07,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:33:07,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:07,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416465864] [2021-08-06 15:33:07,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416465864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:07,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853970791] [2021-08-06 15:33:07,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:07,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:07,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:07,324 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:07,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 15:33:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:33:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:11,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853970791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:11,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:11,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-06 15:33:11,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183729429] [2021-08-06 15:33:11,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:33:11,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:11,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:33:11,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:33:11,026 INFO L87 Difference]: Start difference. First operand 5176 states and 12318 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:12,333 INFO L93 Difference]: Finished difference Result 7105 states and 16648 transitions. [2021-08-06 15:33:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:33:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 35 [2021-08-06 15:33:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:12,342 INFO L225 Difference]: With dead ends: 7105 [2021-08-06 15:33:12,343 INFO L226 Difference]: Without dead ends: 7099 [2021-08-06 15:33:12,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1171.6ms TimeCoverageRelationStatistics Valid=525, Invalid=2445, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:33:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2021-08-06 15:33:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 4791. [2021-08-06 15:33:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 2.3576200417536533) internal successors, (11293), 4790 states have internal predecessors, (11293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 11293 transitions. [2021-08-06 15:33:12,412 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 11293 transitions. Word has length 35 [2021-08-06 15:33:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:12,412 INFO L470 AbstractCegarLoop]: Abstraction has 4791 states and 11293 transitions. [2021-08-06 15:33:12,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 11293 transitions. [2021-08-06 15:33:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:33:12,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:12,418 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:12,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:12,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 15:33:12,621 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:33:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:12,621 INFO L82 PathProgramCache]: Analyzing trace with hash 642210535, now seen corresponding path program 68 times [2021-08-06 15:33:12,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:12,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236603537] [2021-08-06 15:33:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:12,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:12,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:12,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236603537] [2021-08-06 15:33:12,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236603537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:12,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161818521] [2021-08-06 15:33:12,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:12,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:12,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:12,846 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:12,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 15:33:15,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:33:15,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:16,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161818521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:16,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:16,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 15:33:16,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851464109] [2021-08-06 15:33:16,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:33:16,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:33:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:33:16,884 INFO L87 Difference]: Start difference. First operand 4791 states and 11293 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:18,230 INFO L93 Difference]: Finished difference Result 6225 states and 14316 transitions. [2021-08-06 15:33:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:33:18,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:33:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:18,237 INFO L225 Difference]: With dead ends: 6225 [2021-08-06 15:33:18,238 INFO L226 Difference]: Without dead ends: 6153 [2021-08-06 15:33:18,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1318.5ms TimeCoverageRelationStatistics Valid=758, Invalid=3274, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:33:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2021-08-06 15:33:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 4829. [2021-08-06 15:33:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 2.353148301574151) internal successors, (11361), 4828 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 11361 transitions. [2021-08-06 15:33:18,290 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 11361 transitions. Word has length 35 [2021-08-06 15:33:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:18,290 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 11361 transitions. [2021-08-06 15:33:18,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 11361 transitions. [2021-08-06 15:33:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:33:18,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:18,296 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:18,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 15:33:18,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 15:33:18,509 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:33:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1830867861, now seen corresponding path program 69 times [2021-08-06 15:33:18,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:18,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505693347] [2021-08-06 15:33:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:18,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:18,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:18,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505693347] [2021-08-06 15:33:18,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505693347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:18,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264381232] [2021-08-06 15:33:18,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:18,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:18,886 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:18,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 15:33:21,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:33:21,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:33:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:22,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264381232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:22,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:22,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:33:22,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016909369] [2021-08-06 15:33:22,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:33:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:33:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:33:22,447 INFO L87 Difference]: Start difference. First operand 4829 states and 11361 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:29,141 INFO L93 Difference]: Finished difference Result 8848 states and 20103 transitions. [2021-08-06 15:33:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-08-06 15:33:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:33:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:29,153 INFO L225 Difference]: With dead ends: 8848 [2021-08-06 15:33:29,153 INFO L226 Difference]: Without dead ends: 8728 [2021-08-06 15:33:29,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 5457.4ms TimeCoverageRelationStatistics Valid=1877, Invalid=18429, Unknown=0, NotChecked=0, Total=20306 [2021-08-06 15:33:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-08-06 15:33:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 5513. [2021-08-06 15:33:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 2.373367198838897) internal successors, (13082), 5512 states have internal predecessors, (13082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 13082 transitions. [2021-08-06 15:33:29,226 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 13082 transitions. Word has length 35 [2021-08-06 15:33:29,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:29,226 INFO L470 AbstractCegarLoop]: Abstraction has 5513 states and 13082 transitions. [2021-08-06 15:33:29,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 13082 transitions. [2021-08-06 15:33:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:33:29,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:29,231 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:29,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 15:33:29,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:29,431 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:33:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash -871720341, now seen corresponding path program 70 times [2021-08-06 15:33:29,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:29,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087739768] [2021-08-06 15:33:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:29,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:29,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:29,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087739768] [2021-08-06 15:33:29,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087739768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:29,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335029719] [2021-08-06 15:33:29,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:29,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:29,837 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:29,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 15:33:32,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:32,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:33:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:33,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335029719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:33,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:33,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:33:33,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828703627] [2021-08-06 15:33:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:33:33,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:33:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:33:33,495 INFO L87 Difference]: Start difference. First operand 5513 states and 13082 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:39,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:39,666 INFO L93 Difference]: Finished difference Result 8298 states and 19100 transitions. [2021-08-06 15:33:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-06 15:33:39,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:33:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:39,677 INFO L225 Difference]: With dead ends: 8298 [2021-08-06 15:33:39,678 INFO L226 Difference]: Without dead ends: 8240 [2021-08-06 15:33:39,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4802 ImplicationChecksByTransitivity, 5026.2ms TimeCoverageRelationStatistics Valid=1418, Invalid=13588, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 15:33:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8240 states. [2021-08-06 15:33:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8240 to 5579. [2021-08-06 15:33:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5579 states, 5578 states have (on average 2.37486554320545) internal successors, (13247), 5578 states have internal predecessors, (13247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5579 states to 5579 states and 13247 transitions. [2021-08-06 15:33:39,749 INFO L78 Accepts]: Start accepts. Automaton has 5579 states and 13247 transitions. Word has length 35 [2021-08-06 15:33:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:39,749 INFO L470 AbstractCegarLoop]: Abstraction has 5579 states and 13247 transitions. [2021-08-06 15:33:39,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5579 states and 13247 transitions. [2021-08-06 15:33:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:33:39,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:39,754 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:39,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:39,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:39,954 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:33:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:39,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1770065557, now seen corresponding path program 71 times [2021-08-06 15:33:39,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:39,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81235310] [2021-08-06 15:33:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:39,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:40,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:40,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81235310] [2021-08-06 15:33:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81235310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:40,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154717955] [2021-08-06 15:33:40,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:40,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:40,356 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:40,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 15:33:43,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:33:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:33:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:44,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154717955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:44,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:44,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:33:44,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696456915] [2021-08-06 15:33:44,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:33:44,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:33:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:33:44,014 INFO L87 Difference]: Start difference. First operand 5579 states and 13247 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:50,316 INFO L93 Difference]: Finished difference Result 8284 states and 19062 transitions. [2021-08-06 15:33:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-06 15:33:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:33:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:50,326 INFO L225 Difference]: With dead ends: 8284 [2021-08-06 15:33:50,326 INFO L226 Difference]: Without dead ends: 8230 [2021-08-06 15:33:50,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5282 ImplicationChecksByTransitivity, 5201.1ms TimeCoverageRelationStatistics Valid=1506, Invalid=14750, Unknown=0, NotChecked=0, Total=16256 [2021-08-06 15:33:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-08-06 15:33:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 5490. [2021-08-06 15:33:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5490 states, 5489 states have (on average 2.3689196574968117) internal successors, (13003), 5489 states have internal predecessors, (13003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5490 states to 5490 states and 13003 transitions. [2021-08-06 15:33:50,395 INFO L78 Accepts]: Start accepts. Automaton has 5490 states and 13003 transitions. Word has length 35 [2021-08-06 15:33:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:50,395 INFO L470 AbstractCegarLoop]: Abstraction has 5490 states and 13003 transitions. [2021-08-06 15:33:50,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 5490 states and 13003 transitions. [2021-08-06 15:33:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:33:50,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:50,400 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:50,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:50,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:50,601 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:33:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1039199125, now seen corresponding path program 72 times [2021-08-06 15:33:50,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:50,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652268096] [2021-08-06 15:33:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:50,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:50,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:50,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652268096] [2021-08-06 15:33:50,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652268096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:50,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463917704] [2021-08-06 15:33:50,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:50,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:50,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:50,831 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:50,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 15:33:53,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:33:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:33:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:55,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463917704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:55,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:55,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:33:55,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211812374] [2021-08-06 15:33:55,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:33:55,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:33:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:33:55,106 INFO L87 Difference]: Start difference. First operand 5490 states and 13003 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:56,993 INFO L93 Difference]: Finished difference Result 8311 states and 19163 transitions. [2021-08-06 15:33:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:33:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:33:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:57,004 INFO L225 Difference]: With dead ends: 8311 [2021-08-06 15:33:57,004 INFO L226 Difference]: Without dead ends: 8278 [2021-08-06 15:33:57,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1704.4ms TimeCoverageRelationStatistics Valid=930, Invalid=4040, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:33:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-08-06 15:33:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 5614. [2021-08-06 15:33:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5614 states, 5613 states have (on average 2.3819704257972565) internal successors, (13370), 5613 states have internal predecessors, (13370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 13370 transitions. [2021-08-06 15:33:57,072 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 13370 transitions. Word has length 35 [2021-08-06 15:33:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:57,072 INFO L470 AbstractCegarLoop]: Abstraction has 5614 states and 13370 transitions. [2021-08-06 15:33:57,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 13370 transitions. [2021-08-06 15:33:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:33:57,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:57,077 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:57,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:57,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-06 15:33:57,277 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:33:57,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1769565035, now seen corresponding path program 73 times [2021-08-06 15:33:57,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:57,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744269398] [2021-08-06 15:33:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:57,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:57,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:57,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744269398] [2021-08-06 15:33:57,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744269398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:57,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835264542] [2021-08-06 15:33:57,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:57,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:57,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:57,501 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:57,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 15:34:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:00,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:34:00,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:01,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835264542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:01,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:01,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-06 15:34:01,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695090953] [2021-08-06 15:34:01,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:34:01,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:34:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:01,624 INFO L87 Difference]: Start difference. First operand 5614 states and 13370 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:03,319 INFO L93 Difference]: Finished difference Result 6914 states and 16039 transitions. [2021-08-06 15:34:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:34:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:34:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:03,328 INFO L225 Difference]: With dead ends: 6914 [2021-08-06 15:34:03,328 INFO L226 Difference]: Without dead ends: 6906 [2021-08-06 15:34:03,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1451.7ms TimeCoverageRelationStatistics Valid=723, Invalid=3437, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:34:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6906 states. [2021-08-06 15:34:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6906 to 4277. [2021-08-06 15:34:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4276 states have (on average 2.340271281571562) internal successors, (10007), 4276 states have internal predecessors, (10007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 10007 transitions. [2021-08-06 15:34:03,383 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 10007 transitions. Word has length 35 [2021-08-06 15:34:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:03,383 INFO L470 AbstractCegarLoop]: Abstraction has 4277 states and 10007 transitions. [2021-08-06 15:34:03,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 10007 transitions. [2021-08-06 15:34:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:34:03,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:03,387 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:03,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 15:34:03,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:03,587 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:03,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1608573333, now seen corresponding path program 74 times [2021-08-06 15:34:03,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:03,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601698913] [2021-08-06 15:34:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:03,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:03,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:03,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601698913] [2021-08-06 15:34:03,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601698913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:03,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270317214] [2021-08-06 15:34:03,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:03,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:03,814 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:03,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 15:34:06,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:06,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:34:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:08,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270317214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:08,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:08,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 15:34:08,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156589649] [2021-08-06 15:34:08,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:34:08,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:34:08,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:34:08,203 INFO L87 Difference]: Start difference. First operand 4277 states and 10007 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:09,860 INFO L93 Difference]: Finished difference Result 6053 states and 13642 transitions. [2021-08-06 15:34:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:34:09,860 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:34:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:09,867 INFO L225 Difference]: With dead ends: 6053 [2021-08-06 15:34:09,868 INFO L226 Difference]: Without dead ends: 5978 [2021-08-06 15:34:09,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1513.2ms TimeCoverageRelationStatistics Valid=891, Invalid=4221, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:34:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2021-08-06 15:34:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 4303. [2021-08-06 15:34:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.3516968851696887) internal successors, (10117), 4302 states have internal predecessors, (10117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 10117 transitions. [2021-08-06 15:34:09,922 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 10117 transitions. Word has length 35 [2021-08-06 15:34:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:09,922 INFO L470 AbstractCegarLoop]: Abstraction has 4303 states and 10117 transitions. [2021-08-06 15:34:09,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 10117 transitions. [2021-08-06 15:34:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:34:09,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:09,926 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:09,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 15:34:10,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:10,127 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1642682773, now seen corresponding path program 75 times [2021-08-06 15:34:10,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:10,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610030602] [2021-08-06 15:34:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:10,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:10,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:10,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610030602] [2021-08-06 15:34:10,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610030602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:10,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038412649] [2021-08-06 15:34:10,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:10,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:10,329 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:10,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 15:34:13,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:34:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:34:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:14,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038412649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:14,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:14,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 15:34:14,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604100712] [2021-08-06 15:34:14,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:34:14,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:34:14,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:34:14,983 INFO L87 Difference]: Start difference. First operand 4303 states and 10117 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:16,582 INFO L93 Difference]: Finished difference Result 5468 states and 12405 transitions. [2021-08-06 15:34:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:34:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:34:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:16,589 INFO L225 Difference]: With dead ends: 5468 [2021-08-06 15:34:16,589 INFO L226 Difference]: Without dead ends: 5336 [2021-08-06 15:34:16,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 1428.8ms TimeCoverageRelationStatistics Valid=990, Invalid=4412, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:34:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-08-06 15:34:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4056. [2021-08-06 15:34:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 4055 states have (on average 2.3528976572133167) internal successors, (9541), 4055 states have internal predecessors, (9541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 9541 transitions. [2021-08-06 15:34:16,638 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 9541 transitions. Word has length 35 [2021-08-06 15:34:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:16,639 INFO L470 AbstractCegarLoop]: Abstraction has 4056 states and 9541 transitions. [2021-08-06 15:34:16,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 9541 transitions. [2021-08-06 15:34:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 15:34:16,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:16,642 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:16,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-06 15:34:16,843 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash 490867763, now seen corresponding path program 76 times [2021-08-06 15:34:16,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:16,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459747829] [2021-08-06 15:34:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:16,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:17,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:17,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459747829] [2021-08-06 15:34:17,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459747829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:17,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787579716] [2021-08-06 15:34:17,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:17,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:17,025 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:17,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 15:34:20,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:34:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:20,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787579716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:20,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:20,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:34:20,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401832773] [2021-08-06 15:34:20,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:34:20,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:20,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:34:20,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:34:20,920 INFO L87 Difference]: Start difference. First operand 4056 states and 9541 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:22,266 INFO L93 Difference]: Finished difference Result 6115 states and 13848 transitions. [2021-08-06 15:34:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:34:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 15:34:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:22,273 INFO L225 Difference]: With dead ends: 6115 [2021-08-06 15:34:22,273 INFO L226 Difference]: Without dead ends: 6091 [2021-08-06 15:34:22,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 1225.0ms TimeCoverageRelationStatistics Valid=1544, Invalid=4776, Unknown=0, NotChecked=0, Total=6320 [2021-08-06 15:34:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-08-06 15:34:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 4226. [2021-08-06 15:34:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4226 states, 4225 states have (on average 2.3306508875739644) internal successors, (9847), 4225 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4226 states to 4226 states and 9847 transitions. [2021-08-06 15:34:22,329 INFO L78 Accepts]: Start accepts. Automaton has 4226 states and 9847 transitions. Word has length 35 [2021-08-06 15:34:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:22,329 INFO L470 AbstractCegarLoop]: Abstraction has 4226 states and 9847 transitions. [2021-08-06 15:34:22,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4226 states and 9847 transitions. [2021-08-06 15:34:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:34:22,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:22,334 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:22,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:22,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 15:34:22,534 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:22,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash 467845771, now seen corresponding path program 77 times [2021-08-06 15:34:22,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:22,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401687451] [2021-08-06 15:34:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:22,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:22,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:22,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401687451] [2021-08-06 15:34:22,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401687451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:22,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862549806] [2021-08-06 15:34:22,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:22,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:22,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:22,708 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:22,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 15:34:25,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:34:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 15:34:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:27,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862549806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:27,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:27,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-06 15:34:27,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442371342] [2021-08-06 15:34:27,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:34:27,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:34:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:34:27,151 INFO L87 Difference]: Start difference. First operand 4226 states and 9847 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:28,497 INFO L93 Difference]: Finished difference Result 4774 states and 10862 transitions. [2021-08-06 15:34:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:34:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:34:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:28,503 INFO L225 Difference]: With dead ends: 4774 [2021-08-06 15:34:28,503 INFO L226 Difference]: Without dead ends: 4753 [2021-08-06 15:34:28,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1211.0ms TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 15:34:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2021-08-06 15:34:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 3916. [2021-08-06 15:34:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.312899106002554) internal successors, (9055), 3915 states have internal predecessors, (9055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 9055 transitions. [2021-08-06 15:34:28,544 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 9055 transitions. Word has length 37 [2021-08-06 15:34:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:28,544 INFO L470 AbstractCegarLoop]: Abstraction has 3916 states and 9055 transitions. [2021-08-06 15:34:28,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 9055 transitions. [2021-08-06 15:34:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:34:28,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:28,547 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:28,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:28,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:28,748 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash -36211955, now seen corresponding path program 78 times [2021-08-06 15:34:28,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:28,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818403908] [2021-08-06 15:34:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:28,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:28,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:28,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818403908] [2021-08-06 15:34:28,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818403908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:28,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024667534] [2021-08-06 15:34:28,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:28,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:28,908 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:28,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 15:34:32,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-06 15:34:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:34:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:33,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024667534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:33,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:33,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 25 [2021-08-06 15:34:33,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212827225] [2021-08-06 15:34:33,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:34:33,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:34:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:34:33,351 INFO L87 Difference]: Start difference. First operand 3916 states and 9055 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:35,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:35,173 INFO L93 Difference]: Finished difference Result 4193 states and 9568 transitions. [2021-08-06 15:34:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 15:34:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:34:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:35,178 INFO L225 Difference]: With dead ends: 4193 [2021-08-06 15:34:35,178 INFO L226 Difference]: Without dead ends: 4189 [2021-08-06 15:34:35,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 1692.7ms TimeCoverageRelationStatistics Valid=1398, Invalid=5742, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:34:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-08-06 15:34:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3196. [2021-08-06 15:34:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3195 states have (on average 2.3621283255086074) internal successors, (7547), 3195 states have internal predecessors, (7547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 7547 transitions. [2021-08-06 15:34:35,212 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 7547 transitions. Word has length 37 [2021-08-06 15:34:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:35,212 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 7547 transitions. [2021-08-06 15:34:35,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 7547 transitions. [2021-08-06 15:34:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:34:35,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:35,231 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:35,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:35,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:35,431 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:35,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1114812509, now seen corresponding path program 79 times [2021-08-06 15:34:35,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:35,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040098380] [2021-08-06 15:34:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:35,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:35,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:35,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040098380] [2021-08-06 15:34:35,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040098380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:35,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246234595] [2021-08-06 15:34:35,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:35,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:35,809 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:35,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 15:34:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:34:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:39,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246234595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:39,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:39,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:34:39,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12563810] [2021-08-06 15:34:39,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:34:39,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:39,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:34:39,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:34:39,979 INFO L87 Difference]: Start difference. First operand 3196 states and 7547 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:43,924 INFO L93 Difference]: Finished difference Result 4485 states and 10302 transitions. [2021-08-06 15:34:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 15:34:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:34:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:43,929 INFO L225 Difference]: With dead ends: 4485 [2021-08-06 15:34:43,929 INFO L226 Difference]: Without dead ends: 4416 [2021-08-06 15:34:43,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 3409.3ms TimeCoverageRelationStatistics Valid=981, Invalid=7209, Unknown=0, NotChecked=0, Total=8190 [2021-08-06 15:34:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4416 states. [2021-08-06 15:34:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4416 to 3251. [2021-08-06 15:34:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 3250 states have (on average 2.3584615384615386) internal successors, (7665), 3250 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 7665 transitions. [2021-08-06 15:34:43,965 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 7665 transitions. Word has length 37 [2021-08-06 15:34:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:43,966 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 7665 transitions. [2021-08-06 15:34:43,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 7665 transitions. [2021-08-06 15:34:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:34:43,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:43,968 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:43,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 15:34:44,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:44,169 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:44,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1157344247, now seen corresponding path program 80 times [2021-08-06 15:34:44,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:44,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027443276] [2021-08-06 15:34:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:44,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:44,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:44,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027443276] [2021-08-06 15:34:44,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027443276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:44,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681732050] [2021-08-06 15:34:44,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:44,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:44,630 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:44,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 15:34:47,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:34:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:48,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681732050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:48,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:48,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:34:48,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183531246] [2021-08-06 15:34:48,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:34:48,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:34:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:34:48,853 INFO L87 Difference]: Start difference. First operand 3251 states and 7665 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:53,467 INFO L93 Difference]: Finished difference Result 5002 states and 11318 transitions. [2021-08-06 15:34:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 15:34:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:34:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:53,474 INFO L225 Difference]: With dead ends: 5002 [2021-08-06 15:34:53,474 INFO L226 Difference]: Without dead ends: 4947 [2021-08-06 15:34:53,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2931 ImplicationChecksByTransitivity, 3794.0ms TimeCoverageRelationStatistics Valid=1100, Invalid=8800, Unknown=0, NotChecked=0, Total=9900 [2021-08-06 15:34:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-08-06 15:34:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 3291. [2021-08-06 15:34:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3290 states have (on average 2.3610942249240123) internal successors, (7768), 3290 states have internal predecessors, (7768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 7768 transitions. [2021-08-06 15:34:53,515 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 7768 transitions. Word has length 37 [2021-08-06 15:34:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:53,515 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 7768 transitions. [2021-08-06 15:34:53,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 7768 transitions. [2021-08-06 15:34:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:34:53,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:53,517 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:53,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 15:34:53,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:53,718 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:34:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:53,718 INFO L82 PathProgramCache]: Analyzing trace with hash 272651713, now seen corresponding path program 81 times [2021-08-06 15:34:53,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:53,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729694311] [2021-08-06 15:34:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:53,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:54,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:54,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729694311] [2021-08-06 15:34:54,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729694311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:54,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909909329] [2021-08-06 15:34:54,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:54,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:54,208 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:54,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 15:34:57,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:34:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:34:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:58,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909909329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:58,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:58,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-08-06 15:34:58,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429254783] [2021-08-06 15:34:58,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:34:58,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:34:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:34:58,541 INFO L87 Difference]: Start difference. First operand 3291 states and 7768 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:02,963 INFO L93 Difference]: Finished difference Result 4596 states and 10578 transitions. [2021-08-06 15:35:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 15:35:02,963 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:35:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:02,968 INFO L225 Difference]: With dead ends: 4596 [2021-08-06 15:35:02,968 INFO L226 Difference]: Without dead ends: 4562 [2021-08-06 15:35:02,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 3829.5ms TimeCoverageRelationStatistics Valid=1008, Invalid=8304, Unknown=0, NotChecked=0, Total=9312 [2021-08-06 15:35:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-08-06 15:35:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3344. [2021-08-06 15:35:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 2.3583607538139395) internal successors, (7884), 3343 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 7884 transitions. [2021-08-06 15:35:03,007 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 7884 transitions. Word has length 37 [2021-08-06 15:35:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:03,007 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 7884 transitions. [2021-08-06 15:35:03,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 7884 transitions. [2021-08-06 15:35:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:35:03,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:03,009 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:03,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:03,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:03,210 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:35:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1933542437, now seen corresponding path program 82 times [2021-08-06 15:35:03,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:03,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711218723] [2021-08-06 15:35:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:03,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:03,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:03,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711218723] [2021-08-06 15:35:03,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711218723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:03,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208475279] [2021-08-06 15:35:03,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:03,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:03,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:03,640 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:03,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 15:35:07,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:07,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:35:07,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:08,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208475279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:08,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:08,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-08-06 15:35:08,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389641365] [2021-08-06 15:35:08,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:35:08,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:35:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:35:08,032 INFO L87 Difference]: Start difference. First operand 3344 states and 7884 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:12,777 INFO L93 Difference]: Finished difference Result 4593 states and 10563 transitions. [2021-08-06 15:35:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 15:35:12,777 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:35:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:12,783 INFO L225 Difference]: With dead ends: 4593 [2021-08-06 15:35:12,783 INFO L226 Difference]: Without dead ends: 4521 [2021-08-06 15:35:12,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 3969.8ms TimeCoverageRelationStatistics Valid=941, Invalid=9159, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 15:35:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-08-06 15:35:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3384. [2021-08-06 15:35:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 3383 states have (on average 2.3541235589713274) internal successors, (7964), 3383 states have internal predecessors, (7964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 7964 transitions. [2021-08-06 15:35:12,820 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 7964 transitions. Word has length 37 [2021-08-06 15:35:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:12,820 INFO L470 AbstractCegarLoop]: Abstraction has 3384 states and 7964 transitions. [2021-08-06 15:35:12,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 7964 transitions. [2021-08-06 15:35:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:35:12,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:12,823 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:12,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:13,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-06 15:35:13,023 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:35:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash -127944255, now seen corresponding path program 83 times [2021-08-06 15:35:13,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:13,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905656976] [2021-08-06 15:35:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:13,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:13,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:13,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905656976] [2021-08-06 15:35:13,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905656976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:13,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137383171] [2021-08-06 15:35:13,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:13,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:13,524 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:13,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 15:35:17,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 15:35:17,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:35:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137383171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:17,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:17,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-08-06 15:35:17,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730386356] [2021-08-06 15:35:17,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:35:17,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:35:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:35:17,983 INFO L87 Difference]: Start difference. First operand 3384 states and 7964 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:21,029 INFO L93 Difference]: Finished difference Result 4423 states and 10242 transitions. [2021-08-06 15:35:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:35:21,029 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:35:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:21,034 INFO L225 Difference]: With dead ends: 4423 [2021-08-06 15:35:21,035 INFO L226 Difference]: Without dead ends: 4387 [2021-08-06 15:35:21,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2574.0ms TimeCoverageRelationStatistics Valid=784, Invalid=5378, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:35:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2021-08-06 15:35:21,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 3380. [2021-08-06 15:35:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 2.3545427641314) internal successors, (7956), 3379 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 7956 transitions. [2021-08-06 15:35:21,072 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 7956 transitions. Word has length 37 [2021-08-06 15:35:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:21,072 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 7956 transitions. [2021-08-06 15:35:21,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 7956 transitions. [2021-08-06 15:35:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:35:21,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:21,075 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:21,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:21,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:21,276 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:35:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash -526274779, now seen corresponding path program 84 times [2021-08-06 15:35:21,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:21,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470476452] [2021-08-06 15:35:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:21,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:21,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:21,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470476452] [2021-08-06 15:35:21,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470476452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:21,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993554529] [2021-08-06 15:35:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:21,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:21,698 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:21,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 15:35:25,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:35:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:25,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 15:35:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:27,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993554529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:27,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:27,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2021-08-06 15:35:27,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180528524] [2021-08-06 15:35:27,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:35:27,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:27,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:35:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:35:27,150 INFO L87 Difference]: Start difference. First operand 3380 states and 7956 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:30,841 INFO L93 Difference]: Finished difference Result 4965 states and 11353 transitions. [2021-08-06 15:35:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:35:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:35:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:30,848 INFO L225 Difference]: With dead ends: 4965 [2021-08-06 15:35:30,848 INFO L226 Difference]: Without dead ends: 4902 [2021-08-06 15:35:30,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 3352.6ms TimeCoverageRelationStatistics Valid=1154, Invalid=6502, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 15:35:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4902 states. [2021-08-06 15:35:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4902 to 3472. [2021-08-06 15:35:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 2.3471622010947852) internal successors, (8147), 3471 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 8147 transitions. [2021-08-06 15:35:30,887 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 8147 transitions. Word has length 37 [2021-08-06 15:35:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 3472 states and 8147 transitions. [2021-08-06 15:35:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 8147 transitions. [2021-08-06 15:35:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:35:30,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:30,890 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:30,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:31,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:31,091 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:35:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash -375749387, now seen corresponding path program 85 times [2021-08-06 15:35:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:31,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432441833] [2021-08-06 15:35:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:31,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:31,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:31,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432441833] [2021-08-06 15:35:31,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432441833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:31,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276450557] [2021-08-06 15:35:31,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:31,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:31,517 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:31,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 15:35:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:35:35,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:36,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276450557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:36,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:36,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-08-06 15:35:36,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256139912] [2021-08-06 15:35:36,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:35:36,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:35:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:35:36,088 INFO L87 Difference]: Start difference. First operand 3472 states and 8147 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:41,873 INFO L93 Difference]: Finished difference Result 5157 states and 11736 transitions. [2021-08-06 15:35:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 15:35:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:35:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:41,880 INFO L225 Difference]: With dead ends: 5157 [2021-08-06 15:35:41,880 INFO L226 Difference]: Without dead ends: 5097 [2021-08-06 15:35:41,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 4852.1ms TimeCoverageRelationStatistics Valid=1123, Invalid=9797, Unknown=0, NotChecked=0, Total=10920 [2021-08-06 15:35:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-08-06 15:35:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 3625. [2021-08-06 15:35:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 2.3399558498896247) internal successors, (8480), 3624 states have internal predecessors, (8480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 8480 transitions. [2021-08-06 15:35:41,932 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 8480 transitions. Word has length 37 [2021-08-06 15:35:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:41,932 INFO L470 AbstractCegarLoop]: Abstraction has 3625 states and 8480 transitions. [2021-08-06 15:35:41,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 8480 transitions. [2021-08-06 15:35:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:35:41,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:41,936 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:41,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:42,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:42,136 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:35:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:42,137 INFO L82 PathProgramCache]: Analyzing trace with hash 355094565, now seen corresponding path program 86 times [2021-08-06 15:35:42,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:42,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772040946] [2021-08-06 15:35:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:42,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:42,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:42,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772040946] [2021-08-06 15:35:42,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772040946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:42,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229476461] [2021-08-06 15:35:42,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:42,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:42,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:42,698 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:42,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 15:35:46,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:46,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:46,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:35:46,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229476461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:47,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:47,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-08-06 15:35:47,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331049575] [2021-08-06 15:35:47,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:35:47,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:47,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:35:47,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:35:47,286 INFO L87 Difference]: Start difference. First operand 3625 states and 8480 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:50,316 INFO L93 Difference]: Finished difference Result 5929 states and 13535 transitions. [2021-08-06 15:35:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:35:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:35:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:50,324 INFO L225 Difference]: With dead ends: 5929 [2021-08-06 15:35:50,324 INFO L226 Difference]: Without dead ends: 5869 [2021-08-06 15:35:50,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 2540.6ms TimeCoverageRelationStatistics Valid=781, Invalid=5225, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 15:35:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2021-08-06 15:35:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 4149. [2021-08-06 15:35:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4149 states, 4148 states have (on average 2.355834136933462) internal successors, (9772), 4148 states have internal predecessors, (9772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4149 states to 4149 states and 9772 transitions. [2021-08-06 15:35:50,389 INFO L78 Accepts]: Start accepts. Automaton has 4149 states and 9772 transitions. Word has length 37 [2021-08-06 15:35:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:50,389 INFO L470 AbstractCegarLoop]: Abstraction has 4149 states and 9772 transitions. [2021-08-06 15:35:50,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4149 states and 9772 transitions. [2021-08-06 15:35:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:35:50,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:50,392 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:50,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:50,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:50,593 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:35:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1391396889, now seen corresponding path program 87 times [2021-08-06 15:35:50,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:50,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277013678] [2021-08-06 15:35:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:50,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:50,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:50,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277013678] [2021-08-06 15:35:50,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277013678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:50,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79127712] [2021-08-06 15:35:50,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:50,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:51,000 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:51,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 15:35:54,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:35:54,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:54,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:35:54,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:55,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79127712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:55,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:55,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:35:55,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754402653] [2021-08-06 15:35:55,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:35:55,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:55,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:35:55,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:35:55,690 INFO L87 Difference]: Start difference. First operand 4149 states and 9772 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:00,643 INFO L93 Difference]: Finished difference Result 6129 states and 14020 transitions. [2021-08-06 15:36:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 15:36:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:36:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:00,651 INFO L225 Difference]: With dead ends: 6129 [2021-08-06 15:36:00,651 INFO L226 Difference]: Without dead ends: 6058 [2021-08-06 15:36:00,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3640 ImplicationChecksByTransitivity, 4270.2ms TimeCoverageRelationStatistics Valid=1230, Invalid=10760, Unknown=0, NotChecked=0, Total=11990 [2021-08-06 15:36:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-08-06 15:36:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 4310. [2021-08-06 15:36:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4310 states, 4309 states have (on average 2.3573915061499187) internal successors, (10158), 4309 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 10158 transitions. [2021-08-06 15:36:00,707 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 10158 transitions. Word has length 37 [2021-08-06 15:36:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:00,707 INFO L470 AbstractCegarLoop]: Abstraction has 4310 states and 10158 transitions. [2021-08-06 15:36:00,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 10158 transitions. [2021-08-06 15:36:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:36:00,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:00,713 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:00,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:00,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:00,929 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:36:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:00,929 INFO L82 PathProgramCache]: Analyzing trace with hash -701204823, now seen corresponding path program 88 times [2021-08-06 15:36:00,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:00,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334722992] [2021-08-06 15:36:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:00,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:01,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:01,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334722992] [2021-08-06 15:36:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334722992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:01,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478404412] [2021-08-06 15:36:01,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:36:01,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:01,410 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:01,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 15:36:05,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:36:05,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:06,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478404412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:06,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:06,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-08-06 15:36:06,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288486966] [2021-08-06 15:36:06,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:36:06,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:06,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:36:06,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:36:06,141 INFO L87 Difference]: Start difference. First operand 4310 states and 10158 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:10,779 INFO L93 Difference]: Finished difference Result 5862 states and 13544 transitions. [2021-08-06 15:36:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 15:36:10,779 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:36:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:10,787 INFO L225 Difference]: With dead ends: 5862 [2021-08-06 15:36:10,787 INFO L226 Difference]: Without dead ends: 5799 [2021-08-06 15:36:10,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3786.0ms TimeCoverageRelationStatistics Valid=807, Invalid=8123, Unknown=0, NotChecked=0, Total=8930 [2021-08-06 15:36:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5799 states. [2021-08-06 15:36:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5799 to 4530. [2021-08-06 15:36:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4529 states have (on average 2.3473172885846765) internal successors, (10631), 4529 states have internal predecessors, (10631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 10631 transitions. [2021-08-06 15:36:10,842 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 10631 transitions. Word has length 37 [2021-08-06 15:36:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:10,842 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 10631 transitions. [2021-08-06 15:36:10,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 10631 transitions. [2021-08-06 15:36:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:36:10,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:10,846 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:10,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:11,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 15:36:11,047 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:36:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash 524248677, now seen corresponding path program 89 times [2021-08-06 15:36:11,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:11,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230871094] [2021-08-06 15:36:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:11,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:11,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:11,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230871094] [2021-08-06 15:36:11,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230871094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:11,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146424106] [2021-08-06 15:36:11,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:36:11,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:11,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:11,560 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:11,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 15:36:15,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:36:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:16,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146424106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:16,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:16,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-08-06 15:36:16,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424825725] [2021-08-06 15:36:16,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:36:16,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:36:16,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:36:16,302 INFO L87 Difference]: Start difference. First operand 4530 states and 10631 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:21,333 INFO L93 Difference]: Finished difference Result 6115 states and 14099 transitions. [2021-08-06 15:36:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 15:36:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:36:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:21,341 INFO L225 Difference]: With dead ends: 6115 [2021-08-06 15:36:21,341 INFO L226 Difference]: Without dead ends: 6040 [2021-08-06 15:36:21,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 4255.2ms TimeCoverageRelationStatistics Valid=929, Invalid=7813, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 15:36:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2021-08-06 15:36:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 4717. [2021-08-06 15:36:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 4716 states have (on average 2.3369380831212894) internal successors, (11021), 4716 states have internal predecessors, (11021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 11021 transitions. [2021-08-06 15:36:21,393 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 11021 transitions. Word has length 37 [2021-08-06 15:36:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:21,393 INFO L470 AbstractCegarLoop]: Abstraction has 4717 states and 11021 transitions. [2021-08-06 15:36:21,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 11021 transitions. [2021-08-06 15:36:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:36:21,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:21,416 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:21,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:21,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:21,617 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:36:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1133945257, now seen corresponding path program 90 times [2021-08-06 15:36:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:21,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825091274] [2021-08-06 15:36:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:21,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:22,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:22,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825091274] [2021-08-06 15:36:22,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825091274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:22,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641446121] [2021-08-06 15:36:22,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:22,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:22,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:22,225 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:22,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 15:36:26,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:36:26,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:26,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:26,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641446121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:27,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:27,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-08-06 15:36:27,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605899519] [2021-08-06 15:36:27,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:36:27,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:36:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:36:27,048 INFO L87 Difference]: Start difference. First operand 4717 states and 11021 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:29,873 INFO L93 Difference]: Finished difference Result 6337 states and 14575 transitions. [2021-08-06 15:36:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:36:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:36:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:29,881 INFO L225 Difference]: With dead ends: 6337 [2021-08-06 15:36:29,881 INFO L226 Difference]: Without dead ends: 6313 [2021-08-06 15:36:29,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 2597.6ms TimeCoverageRelationStatistics Valid=633, Invalid=4197, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 15:36:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-08-06 15:36:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 4714. [2021-08-06 15:36:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 2.335879482283047) internal successors, (11009), 4713 states have internal predecessors, (11009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 11009 transitions. [2021-08-06 15:36:29,937 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 11009 transitions. Word has length 37 [2021-08-06 15:36:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:29,938 INFO L470 AbstractCegarLoop]: Abstraction has 4714 states and 11009 transitions. [2021-08-06 15:36:29,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 11009 transitions. [2021-08-06 15:36:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:36:29,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:29,942 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:29,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 15:36:30,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:30,142 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:36:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash 180164521, now seen corresponding path program 91 times [2021-08-06 15:36:30,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:30,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765525117] [2021-08-06 15:36:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:30,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:30,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:30,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765525117] [2021-08-06 15:36:30,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765525117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:30,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021054476] [2021-08-06 15:36:30,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:36:30,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:30,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:30,722 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:30,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 15:36:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:35,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021054476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:35,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:35,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-08-06 15:36:35,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339204455] [2021-08-06 15:36:35,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:36:35,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:36:35,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:36:35,614 INFO L87 Difference]: Start difference. First operand 4714 states and 11009 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:40,666 INFO L93 Difference]: Finished difference Result 6386 states and 14678 transitions. [2021-08-06 15:36:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 15:36:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:36:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:40,674 INFO L225 Difference]: With dead ends: 6386 [2021-08-06 15:36:40,675 INFO L226 Difference]: Without dead ends: 6323 [2021-08-06 15:36:40,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 4321.6ms TimeCoverageRelationStatistics Valid=1265, Invalid=10507, Unknown=0, NotChecked=0, Total=11772 [2021-08-06 15:36:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-08-06 15:36:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 4877. [2021-08-06 15:36:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4877 states, 4876 states have (on average 2.330188679245283) internal successors, (11362), 4876 states have internal predecessors, (11362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 11362 transitions. [2021-08-06 15:36:40,746 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 11362 transitions. Word has length 37 [2021-08-06 15:36:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:40,746 INFO L470 AbstractCegarLoop]: Abstraction has 4877 states and 11362 transitions. [2021-08-06 15:36:40,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 11362 transitions. [2021-08-06 15:36:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:36:40,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:40,750 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:40,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 15:36:40,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:40,951 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:36:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:40,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1907252481, now seen corresponding path program 92 times [2021-08-06 15:36:40,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:40,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158915429] [2021-08-06 15:36:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:40,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 15:36:41,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:41,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158915429] [2021-08-06 15:36:41,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158915429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:41,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674370310] [2021-08-06 15:36:41,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:41,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:41,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:41,341 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:41,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 15:36:45,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:45,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:36:46,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674370310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:46,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:46,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-06 15:36:46,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522927674] [2021-08-06 15:36:46,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:36:46,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:36:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:36:46,299 INFO L87 Difference]: Start difference. First operand 4877 states and 11362 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:49,041 INFO L93 Difference]: Finished difference Result 6453 states and 14797 transitions. [2021-08-06 15:36:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:36:49,042 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:36:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:49,049 INFO L225 Difference]: With dead ends: 6453 [2021-08-06 15:36:49,049 INFO L226 Difference]: Without dead ends: 6393 [2021-08-06 15:36:49,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2400.7ms TimeCoverageRelationStatistics Valid=602, Invalid=3954, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:36:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-08-06 15:36:49,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 4981. [2021-08-06 15:36:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4981 states, 4980 states have (on average 2.3238955823293175) internal successors, (11573), 4980 states have internal predecessors, (11573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 11573 transitions. [2021-08-06 15:36:49,128 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 11573 transitions. Word has length 37 [2021-08-06 15:36:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:49,128 INFO L470 AbstractCegarLoop]: Abstraction has 4981 states and 11573 transitions. [2021-08-06 15:36:49,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 11573 transitions. [2021-08-06 15:36:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:36:49,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:49,132 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:49,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:49,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:49,333 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:36:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -573822039, now seen corresponding path program 93 times [2021-08-06 15:36:49,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:49,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273208921] [2021-08-06 15:36:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:49,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:49,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:49,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273208921] [2021-08-06 15:36:49,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273208921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:49,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931040854] [2021-08-06 15:36:49,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:49,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:49,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:49,773 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:49,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 15:36:53,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:36:53,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:36:53,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:54,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931040854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:54,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:54,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-08-06 15:36:54,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731258666] [2021-08-06 15:36:54,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:36:54,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:36:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:36:54,708 INFO L87 Difference]: Start difference. First operand 4981 states and 11573 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:59,800 INFO L93 Difference]: Finished difference Result 6805 states and 15487 transitions. [2021-08-06 15:36:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-06 15:36:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:36:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:59,808 INFO L225 Difference]: With dead ends: 6805 [2021-08-06 15:36:59,808 INFO L226 Difference]: Without dead ends: 6717 [2021-08-06 15:36:59,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3679 ImplicationChecksByTransitivity, 4338.7ms TimeCoverageRelationStatistics Valid=1240, Invalid=10970, Unknown=0, NotChecked=0, Total=12210 [2021-08-06 15:36:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2021-08-06 15:36:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 5024. [2021-08-06 15:36:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5024 states, 5023 states have (on average 2.3223173402349193) internal successors, (11665), 5023 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 11665 transitions. [2021-08-06 15:36:59,865 INFO L78 Accepts]: Start accepts. Automaton has 5024 states and 11665 transitions. Word has length 37 [2021-08-06 15:36:59,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:59,865 INFO L470 AbstractCegarLoop]: Abstraction has 5024 states and 11665 transitions. [2021-08-06 15:36:59,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5024 states and 11665 transitions. [2021-08-06 15:36:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:36:59,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:59,870 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:59,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:00,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:00,070 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2000111561, now seen corresponding path program 94 times [2021-08-06 15:37:00,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:00,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338751920] [2021-08-06 15:37:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:00,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:00,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:00,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338751920] [2021-08-06 15:37:00,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338751920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:00,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450853805] [2021-08-06 15:37:00,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:00,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:00,510 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:00,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 15:37:04,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:37:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:05,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450853805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:05,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:05,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:37:05,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93440129] [2021-08-06 15:37:05,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:37:05,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:05,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:37:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:05,365 INFO L87 Difference]: Start difference. First operand 5024 states and 11665 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:07,605 INFO L93 Difference]: Finished difference Result 6597 states and 15100 transitions. [2021-08-06 15:37:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:37:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:07,627 INFO L225 Difference]: With dead ends: 6597 [2021-08-06 15:37:07,627 INFO L226 Difference]: Without dead ends: 6546 [2021-08-06 15:37:07,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1930.6ms TimeCoverageRelationStatistics Valid=588, Invalid=4814, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:37:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6546 states. [2021-08-06 15:37:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6546 to 5030. [2021-08-06 15:37:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.3219327898190496) internal successors, (11677), 5029 states have internal predecessors, (11677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 11677 transitions. [2021-08-06 15:37:07,680 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 11677 transitions. Word has length 39 [2021-08-06 15:37:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:07,680 INFO L470 AbstractCegarLoop]: Abstraction has 5030 states and 11677 transitions. [2021-08-06 15:37:07,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 11677 transitions. [2021-08-06 15:37:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:37:07,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:07,685 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:07,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:07,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-06 15:37:07,885 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1511680283, now seen corresponding path program 95 times [2021-08-06 15:37:07,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:07,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915797961] [2021-08-06 15:37:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:07,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:08,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:08,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915797961] [2021-08-06 15:37:08,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915797961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:08,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296445612] [2021-08-06 15:37:08,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:37:08,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:08,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:08,346 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:08,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 15:37:12,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:37:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:12,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:37:12,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:13,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296445612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:13,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:13,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:37:13,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842475594] [2021-08-06 15:37:13,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:37:13,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:37:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:13,298 INFO L87 Difference]: Start difference. First operand 5030 states and 11677 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:16,308 INFO L93 Difference]: Finished difference Result 6623 states and 15141 transitions. [2021-08-06 15:37:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:37:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:16,315 INFO L225 Difference]: With dead ends: 6623 [2021-08-06 15:37:16,316 INFO L226 Difference]: Without dead ends: 6539 [2021-08-06 15:37:16,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2387.7ms TimeCoverageRelationStatistics Valid=764, Invalid=6892, Unknown=0, NotChecked=0, Total=7656 [2021-08-06 15:37:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-08-06 15:37:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 5044. [2021-08-06 15:37:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5044 states, 5043 states have (on average 2.321039064049177) internal successors, (11705), 5043 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5044 states to 5044 states and 11705 transitions. [2021-08-06 15:37:16,376 INFO L78 Accepts]: Start accepts. Automaton has 5044 states and 11705 transitions. Word has length 39 [2021-08-06 15:37:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:16,376 INFO L470 AbstractCegarLoop]: Abstraction has 5044 states and 11705 transitions. [2021-08-06 15:37:16,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5044 states and 11705 transitions. [2021-08-06 15:37:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:37:16,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:16,381 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:16,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 15:37:16,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 15:37:16,581 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:16,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1145995237, now seen corresponding path program 96 times [2021-08-06 15:37:16,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:16,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812374733] [2021-08-06 15:37:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:16,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:17,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:17,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812374733] [2021-08-06 15:37:17,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812374733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:17,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459431418] [2021-08-06 15:37:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:37:17,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:17,053 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:17,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 15:37:21,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:37:21,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:37:21,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:22,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459431418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:22,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:22,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:37:22,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538837182] [2021-08-06 15:37:22,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:37:22,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:22,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:37:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:22,090 INFO L87 Difference]: Start difference. First operand 5044 states and 11705 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:25,022 INFO L93 Difference]: Finished difference Result 6594 states and 15083 transitions. [2021-08-06 15:37:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:37:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:25,031 INFO L225 Difference]: With dead ends: 6594 [2021-08-06 15:37:25,031 INFO L226 Difference]: Without dead ends: 6546 [2021-08-06 15:37:25,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 2407.7ms TimeCoverageRelationStatistics Valid=832, Invalid=6308, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:37:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6546 states. [2021-08-06 15:37:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6546 to 5056. [2021-08-06 15:37:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 2.320276953511375) internal successors, (11729), 5055 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 11729 transitions. [2021-08-06 15:37:25,088 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 11729 transitions. Word has length 39 [2021-08-06 15:37:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:25,088 INFO L470 AbstractCegarLoop]: Abstraction has 5056 states and 11729 transitions. [2021-08-06 15:37:25,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 11729 transitions. [2021-08-06 15:37:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:37:25,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:25,093 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:25,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 15:37:25,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:25,293 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash -165521637, now seen corresponding path program 97 times [2021-08-06 15:37:25,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:25,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66948713] [2021-08-06 15:37:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:25,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:25,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:25,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66948713] [2021-08-06 15:37:25,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66948713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:25,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967359786] [2021-08-06 15:37:25,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:37:25,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:25,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:25,700 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:25,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 15:37:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:37:29,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:30,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967359786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:30,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:30,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:37:30,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811470827] [2021-08-06 15:37:30,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:37:30,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:37:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:30,752 INFO L87 Difference]: Start difference. First operand 5056 states and 11729 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:33,726 INFO L93 Difference]: Finished difference Result 6655 states and 15209 transitions. [2021-08-06 15:37:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:37:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:33,736 INFO L225 Difference]: With dead ends: 6655 [2021-08-06 15:37:33,736 INFO L226 Difference]: Without dead ends: 6613 [2021-08-06 15:37:33,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 2467.1ms TimeCoverageRelationStatistics Valid=884, Invalid=6426, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 15:37:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-08-06 15:37:33,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 5068. [2021-08-06 15:37:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5068 states, 5067 states have (on average 2.319518452733373) internal successors, (11753), 5067 states have internal predecessors, (11753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 11753 transitions. [2021-08-06 15:37:33,797 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 11753 transitions. Word has length 39 [2021-08-06 15:37:33,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:33,797 INFO L470 AbstractCegarLoop]: Abstraction has 5068 states and 11753 transitions. [2021-08-06 15:37:33,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 11753 transitions. [2021-08-06 15:37:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:37:33,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:33,801 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:33,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:34,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:34,002 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -186847717, now seen corresponding path program 98 times [2021-08-06 15:37:34,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:34,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668013219] [2021-08-06 15:37:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:34,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:34,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:34,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668013219] [2021-08-06 15:37:34,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668013219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:34,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104112708] [2021-08-06 15:37:34,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:37:34,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:34,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:34,453 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:34,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 15:37:38,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:38,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:37:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:39,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104112708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:39,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:39,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:37:39,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504070697] [2021-08-06 15:37:39,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:37:39,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:37:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:39,537 INFO L87 Difference]: Start difference. First operand 5068 states and 11753 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:42,368 INFO L93 Difference]: Finished difference Result 6682 states and 15266 transitions. [2021-08-06 15:37:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:37:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:42,377 INFO L225 Difference]: With dead ends: 6682 [2021-08-06 15:37:42,377 INFO L226 Difference]: Without dead ends: 6646 [2021-08-06 15:37:42,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 2439.1ms TimeCoverageRelationStatistics Valid=867, Invalid=6273, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:37:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2021-08-06 15:37:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 5080. [2021-08-06 15:37:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5080 states, 5079 states have (on average 2.3187635361291594) internal successors, (11777), 5079 states have internal predecessors, (11777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 11777 transitions. [2021-08-06 15:37:42,465 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 11777 transitions. Word has length 39 [2021-08-06 15:37:42,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:42,465 INFO L470 AbstractCegarLoop]: Abstraction has 5080 states and 11777 transitions. [2021-08-06 15:37:42,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 11777 transitions. [2021-08-06 15:37:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:37:42,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:42,470 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:42,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 15:37:42,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 15:37:42,671 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1085192933, now seen corresponding path program 99 times [2021-08-06 15:37:42,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:42,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885762390] [2021-08-06 15:37:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:42,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:43,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:43,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885762390] [2021-08-06 15:37:43,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885762390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:43,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843120256] [2021-08-06 15:37:43,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:37:43,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:43,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:43,080 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:43,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 15:37:47,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:37:47,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:37:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:48,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843120256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:48,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:48,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:37:48,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283199394] [2021-08-06 15:37:48,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:37:48,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:37:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:48,222 INFO L87 Difference]: Start difference. First operand 5080 states and 11777 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:51,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:51,691 INFO L93 Difference]: Finished difference Result 6933 states and 15761 transitions. [2021-08-06 15:37:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 15:37:51,694 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:37:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:51,703 INFO L225 Difference]: With dead ends: 6933 [2021-08-06 15:37:51,703 INFO L226 Difference]: Without dead ends: 6894 [2021-08-06 15:37:51,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 2693.6ms TimeCoverageRelationStatistics Valid=952, Invalid=7790, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 15:37:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6894 states. [2021-08-06 15:37:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6894 to 5122. [2021-08-06 15:37:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 5121 states have (on average 2.3204452255418864) internal successors, (11883), 5121 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 11883 transitions. [2021-08-06 15:37:51,762 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 11883 transitions. Word has length 39 [2021-08-06 15:37:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:51,762 INFO L470 AbstractCegarLoop]: Abstraction has 5122 states and 11883 transitions. [2021-08-06 15:37:51,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 11883 transitions. [2021-08-06 15:37:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:37:51,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:51,767 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:51,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 15:37:51,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:51,968 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2028952603, now seen corresponding path program 100 times [2021-08-06 15:37:51,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:51,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457632790] [2021-08-06 15:37:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:51,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:52,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:52,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457632790] [2021-08-06 15:37:52,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457632790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:52,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278353917] [2021-08-06 15:37:52,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:52,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:52,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:52,329 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 15:37:56,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:56,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 15:37:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:57,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278353917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:57,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:57,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 15:37:57,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476213423] [2021-08-06 15:37:57,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:37:57,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:37:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:37:57,241 INFO L87 Difference]: Start difference. First operand 5122 states and 11883 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:01,041 INFO L93 Difference]: Finished difference Result 7241 states and 16469 transitions. [2021-08-06 15:38:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-06 15:38:01,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:38:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:01,051 INFO L225 Difference]: With dead ends: 7241 [2021-08-06 15:38:01,051 INFO L226 Difference]: Without dead ends: 7148 [2021-08-06 15:38:01,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6658 ImplicationChecksByTransitivity, 2895.9ms TimeCoverageRelationStatistics Valid=2148, Invalid=16212, Unknown=0, NotChecked=0, Total=18360 [2021-08-06 15:38:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7148 states. [2021-08-06 15:38:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7148 to 5559. [2021-08-06 15:38:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.344008636200072) internal successors, (13028), 5558 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 13028 transitions. [2021-08-06 15:38:01,120 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 13028 transitions. Word has length 39 [2021-08-06 15:38:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:01,120 INFO L470 AbstractCegarLoop]: Abstraction has 5559 states and 13028 transitions. [2021-08-06 15:38:01,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 13028 transitions. [2021-08-06 15:38:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:38:01,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:01,125 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:01,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 15:38:01,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:01,325 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:38:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 928333215, now seen corresponding path program 101 times [2021-08-06 15:38:01,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:01,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282390062] [2021-08-06 15:38:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:01,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:01,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:01,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282390062] [2021-08-06 15:38:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282390062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:01,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698534572] [2021-08-06 15:38:01,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:38:01,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:01,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:01,815 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:01,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 15:38:06,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:38:06,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:38:06,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698534572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:07,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:07,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:38:07,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834434346] [2021-08-06 15:38:07,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:38:07,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:38:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:38:07,046 INFO L87 Difference]: Start difference. First operand 5559 states and 13028 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:12,806 INFO L93 Difference]: Finished difference Result 7550 states and 17375 transitions. [2021-08-06 15:38:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-06 15:38:12,807 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:38:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:12,815 INFO L225 Difference]: With dead ends: 7550 [2021-08-06 15:38:12,816 INFO L226 Difference]: Without dead ends: 7418 [2021-08-06 15:38:12,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 4990.5ms TimeCoverageRelationStatistics Valid=1625, Invalid=13381, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 15:38:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2021-08-06 15:38:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 5583. [2021-08-06 15:38:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.3432461483339306) internal successors, (13080), 5582 states have internal predecessors, (13080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13080 transitions. [2021-08-06 15:38:12,881 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13080 transitions. Word has length 39 [2021-08-06 15:38:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:12,881 INFO L470 AbstractCegarLoop]: Abstraction has 5583 states and 13080 transitions. [2021-08-06 15:38:12,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13080 transitions. [2021-08-06 15:38:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:38:12,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:12,886 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:12,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 15:38:13,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 15:38:13,087 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:38:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash -748868705, now seen corresponding path program 102 times [2021-08-06 15:38:13,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:13,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285249480] [2021-08-06 15:38:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:13,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:13,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285249480] [2021-08-06 15:38:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285249480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459332581] [2021-08-06 15:38:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:38:13,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:13,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:13,517 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:13,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 15:38:17,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:38:17,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:38:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459332581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:18,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:18,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:38:18,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724727713] [2021-08-06 15:38:18,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:38:18,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:38:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:38:18,831 INFO L87 Difference]: Start difference. First operand 5583 states and 13080 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:24,433 INFO L93 Difference]: Finished difference Result 7549 states and 17374 transitions. [2021-08-06 15:38:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-06 15:38:24,433 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:38:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:24,442 INFO L225 Difference]: With dead ends: 7549 [2021-08-06 15:38:24,443 INFO L226 Difference]: Without dead ends: 7459 [2021-08-06 15:38:24,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 4891.9ms TimeCoverageRelationStatistics Valid=1697, Invalid=13309, Unknown=0, NotChecked=0, Total=15006 [2021-08-06 15:38:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2021-08-06 15:38:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 5591. [2021-08-06 15:38:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5591 states, 5590 states have (on average 2.3427549194991055) internal successors, (13096), 5590 states have internal predecessors, (13096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5591 states to 5591 states and 13096 transitions. [2021-08-06 15:38:24,509 INFO L78 Accepts]: Start accepts. Automaton has 5591 states and 13096 transitions. Word has length 39 [2021-08-06 15:38:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:24,509 INFO L470 AbstractCegarLoop]: Abstraction has 5591 states and 13096 transitions. [2021-08-06 15:38:24,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5591 states and 13096 transitions. [2021-08-06 15:38:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:38:24,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:24,514 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:24,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:24,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:38:24,714 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:38:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash -770194785, now seen corresponding path program 103 times [2021-08-06 15:38:24,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:24,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046632803] [2021-08-06 15:38:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:24,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:25,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:25,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046632803] [2021-08-06 15:38:25,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046632803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:25,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979612000] [2021-08-06 15:38:25,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:38:25,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:25,225 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:25,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 15:38:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:38:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:30,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979612000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:30,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:30,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:38:30,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205144050] [2021-08-06 15:38:30,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:38:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:38:30,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:38:30,630 INFO L87 Difference]: Start difference. First operand 5591 states and 13096 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:35,977 INFO L93 Difference]: Finished difference Result 7568 states and 17416 transitions. [2021-08-06 15:38:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-06 15:38:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:38:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:35,986 INFO L225 Difference]: With dead ends: 7568 [2021-08-06 15:38:35,986 INFO L226 Difference]: Without dead ends: 7505 [2021-08-06 15:38:35,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4624 ImplicationChecksByTransitivity, 4793.6ms TimeCoverageRelationStatistics Valid=1701, Invalid=13061, Unknown=0, NotChecked=0, Total=14762 [2021-08-06 15:38:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-08-06 15:38:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 5599. [2021-08-06 15:38:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 2.3422650946766703) internal successors, (13112), 5598 states have internal predecessors, (13112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 13112 transitions. [2021-08-06 15:38:36,049 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 13112 transitions. Word has length 39 [2021-08-06 15:38:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:36,049 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 13112 transitions. [2021-08-06 15:38:36,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 13112 transitions. [2021-08-06 15:38:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:38:36,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:36,054 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:36,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:36,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:36,254 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:38:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1668540001, now seen corresponding path program 104 times [2021-08-06 15:38:36,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:36,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548240501] [2021-08-06 15:38:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:36,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:36,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:36,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548240501] [2021-08-06 15:38:36,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548240501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:36,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801174466] [2021-08-06 15:38:36,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:38:36,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:36,731 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:36,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 15:38:41,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:38:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:41,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:38:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:42,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801174466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:42,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:42,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-08-06 15:38:42,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820570479] [2021-08-06 15:38:42,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 15:38:42,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:42,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 15:38:42,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:38:42,163 INFO L87 Difference]: Start difference. First operand 5599 states and 13112 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:48,233 INFO L93 Difference]: Finished difference Result 7896 states and 18015 transitions. [2021-08-06 15:38:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-06 15:38:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:38:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:48,243 INFO L225 Difference]: With dead ends: 7896 [2021-08-06 15:38:48,243 INFO L226 Difference]: Without dead ends: 7824 [2021-08-06 15:38:48,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6061 ImplicationChecksByTransitivity, 5146.9ms TimeCoverageRelationStatistics Valid=1895, Invalid=16737, Unknown=0, NotChecked=0, Total=18632 [2021-08-06 15:38:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7824 states. [2021-08-06 15:38:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7824 to 5607. [2021-08-06 15:38:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5607 states, 5606 states have (on average 2.3417766678558687) internal successors, (13128), 5606 states have internal predecessors, (13128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5607 states to 5607 states and 13128 transitions. [2021-08-06 15:38:48,319 INFO L78 Accepts]: Start accepts. Automaton has 5607 states and 13128 transitions. Word has length 39 [2021-08-06 15:38:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:48,319 INFO L470 AbstractCegarLoop]: Abstraction has 5607 states and 13128 transitions. [2021-08-06 15:38:48,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5607 states and 13128 transitions. [2021-08-06 15:38:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:38:48,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:48,324 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:48,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:48,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:48,525 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:38:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash -383175265, now seen corresponding path program 105 times [2021-08-06 15:38:48,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:48,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268407712] [2021-08-06 15:38:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:48,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:48,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:48,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268407712] [2021-08-06 15:38:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268407712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:48,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418307208] [2021-08-06 15:38:48,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:38:48,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:48,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:48,997 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:48,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 15:38:53,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:38:53,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:53,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:38:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:54,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418307208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:54,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:54,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-08-06 15:38:54,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933724833] [2021-08-06 15:38:54,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:38:54,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:54,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:38:54,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:38:54,414 INFO L87 Difference]: Start difference. First operand 5607 states and 13128 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:59,466 INFO L93 Difference]: Finished difference Result 7551 states and 17373 transitions. [2021-08-06 15:38:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-06 15:38:59,467 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:38:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:59,474 INFO L225 Difference]: With dead ends: 7551 [2021-08-06 15:38:59,474 INFO L226 Difference]: Without dead ends: 7452 [2021-08-06 15:38:59,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 4370.4ms TimeCoverageRelationStatistics Valid=1360, Invalid=11296, Unknown=0, NotChecked=0, Total=12656 [2021-08-06 15:38:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7452 states. [2021-08-06 15:38:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7452 to 5627. [2021-08-06 15:38:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5627 states, 5626 states have (on average 2.341272662637753) internal successors, (13172), 5626 states have internal predecessors, (13172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5627 states to 5627 states and 13172 transitions. [2021-08-06 15:38:59,536 INFO L78 Accepts]: Start accepts. Automaton has 5627 states and 13172 transitions. Word has length 39 [2021-08-06 15:38:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:59,536 INFO L470 AbstractCegarLoop]: Abstraction has 5627 states and 13172 transitions. [2021-08-06 15:38:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5627 states and 13172 transitions. [2021-08-06 15:38:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:38:59,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:59,541 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:59,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 15:38:59,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 15:38:59,742 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:38:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash 575972255, now seen corresponding path program 106 times [2021-08-06 15:38:59,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:59,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524276867] [2021-08-06 15:38:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:59,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:00,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:00,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524276867] [2021-08-06 15:39:00,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524276867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:00,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28613187] [2021-08-06 15:39:00,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:39:00,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:00,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:00,157 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:00,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 15:39:04,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:39:04,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:39:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:05,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28613187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:05,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:05,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-08-06 15:39:05,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917209658] [2021-08-06 15:39:05,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:39:05,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:39:05,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:39:05,651 INFO L87 Difference]: Start difference. First operand 5627 states and 13172 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:10,750 INFO L93 Difference]: Finished difference Result 7474 states and 17219 transitions. [2021-08-06 15:39:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-06 15:39:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:39:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:10,759 INFO L225 Difference]: With dead ends: 7474 [2021-08-06 15:39:10,760 INFO L226 Difference]: Without dead ends: 7411 [2021-08-06 15:39:10,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4083 ImplicationChecksByTransitivity, 4481.4ms TimeCoverageRelationStatistics Valid=1560, Invalid=11550, Unknown=0, NotChecked=0, Total=13110 [2021-08-06 15:39:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-08-06 15:39:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 5637. [2021-08-06 15:39:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5637 states, 5636 states have (on average 2.340667139815472) internal successors, (13192), 5636 states have internal predecessors, (13192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 13192 transitions. [2021-08-06 15:39:10,845 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 13192 transitions. Word has length 39 [2021-08-06 15:39:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:10,845 INFO L470 AbstractCegarLoop]: Abstraction has 5637 states and 13192 transitions. [2021-08-06 15:39:10,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 13192 transitions. [2021-08-06 15:39:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:39:10,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:10,850 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:10,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 15:39:11,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 15:39:11,050 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:39:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash -322372961, now seen corresponding path program 107 times [2021-08-06 15:39:11,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:11,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025263866] [2021-08-06 15:39:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:11,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:11,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:11,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025263866] [2021-08-06 15:39:11,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025263866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:11,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846495013] [2021-08-06 15:39:11,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:39:11,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:11,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:11,453 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:11,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 15:39:16,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 15:39:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:16,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:39:16,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:17,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846495013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:17,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:17,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-08-06 15:39:17,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073629333] [2021-08-06 15:39:17,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:39:17,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:39:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:39:17,039 INFO L87 Difference]: Start difference. First operand 5637 states and 13192 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:22,321 INFO L93 Difference]: Finished difference Result 7799 states and 17830 transitions. [2021-08-06 15:39:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-06 15:39:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:39:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:22,332 INFO L225 Difference]: With dead ends: 7799 [2021-08-06 15:39:22,332 INFO L226 Difference]: Without dead ends: 7727 [2021-08-06 15:39:22,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4823 ImplicationChecksByTransitivity, 4499.6ms TimeCoverageRelationStatistics Valid=1676, Invalid=13576, Unknown=0, NotChecked=0, Total=15252 [2021-08-06 15:39:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-08-06 15:39:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 5633. [2021-08-06 15:39:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5633 states, 5632 states have (on average 2.340909090909091) internal successors, (13184), 5632 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5633 states to 5633 states and 13184 transitions. [2021-08-06 15:39:22,405 INFO L78 Accepts]: Start accepts. Automaton has 5633 states and 13184 transitions. Word has length 39 [2021-08-06 15:39:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:22,405 INFO L470 AbstractCegarLoop]: Abstraction has 5633 states and 13184 transitions. [2021-08-06 15:39:22,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5633 states and 13184 transitions. [2021-08-06 15:39:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:39:22,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:22,410 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:22,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 15:39:22,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:22,611 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:39:22,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:22,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1872440735, now seen corresponding path program 108 times [2021-08-06 15:39:22,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:22,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714093278] [2021-08-06 15:39:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:22,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:23,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:23,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714093278] [2021-08-06 15:39:23,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714093278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:23,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378866634] [2021-08-06 15:39:23,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:39:23,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:23,097 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:23,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 15:39:27,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 15:39:27,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:39:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:28,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378866634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:28,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:28,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-08-06 15:39:28,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648128334] [2021-08-06 15:39:28,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 15:39:28,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:28,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 15:39:28,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:39:28,605 INFO L87 Difference]: Start difference. First operand 5633 states and 13184 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 15:39:31,298 WARN L223 SmtUtils]: Removed 7 from assertion stack [2021-08-06 15:39:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:39:31,299 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:39:31,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:31,346 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:39:31,346 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:39:31,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:31,499 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (5633states) and FLOYD_HOARE automaton (currently 48 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 26ms.. [2021-08-06 15:39:31,501 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:39:31,501 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:39:31,504 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:39:31,504 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:39:31,505 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:39:31 BasicIcfg [2021-08-06 15:39:31,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:39:31,506 INFO L168 Benchmark]: Toolchain (without parser) took 703162.08 ms. Allocated memory was 197.1 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 177.9 MB in the beginning and 1.1 GB in the end (delta: -946.2 MB). Peak memory consumption was 352.7 MB. Max. memory is 8.0 GB. [2021-08-06 15:39:31,506 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 197.1 MB. Free memory is still 179.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:39:31,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.54 ms. Allocated memory is still 197.1 MB. Free memory was 177.9 MB in the beginning and 176.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:39:31,506 INFO L168 Benchmark]: Boogie Preprocessor took 13.03 ms. Allocated memory is still 197.1 MB. Free memory was 176.4 MB in the beginning and 175.5 MB in the end (delta: 881.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:39:31,506 INFO L168 Benchmark]: RCFGBuilder took 192.47 ms. Allocated memory is still 197.1 MB. Free memory was 175.4 MB in the beginning and 163.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:39:31,506 INFO L168 Benchmark]: TraceAbstraction took 702926.84 ms. Allocated memory was 197.1 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 163.2 MB in the beginning and 1.1 GB in the end (delta: -960.9 MB). Peak memory consumption was 338.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:39:31,506 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 197.1 MB. Free memory is still 179.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.54 ms. Allocated memory is still 197.1 MB. Free memory was 177.9 MB in the beginning and 176.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.03 ms. Allocated memory is still 197.1 MB. Free memory was 176.4 MB in the beginning and 175.5 MB in the end (delta: 881.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 192.47 ms. Allocated memory is still 197.1 MB. Free memory was 175.4 MB in the beginning and 163.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 702926.84 ms. Allocated memory was 197.1 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 163.2 MB in the beginning and 1.1 GB in the end (delta: -960.9 MB). Peak memory consumption was 338.0 MB. 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: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (5633states) and FLOYD_HOARE automaton (currently 48 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 26ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5633states) and FLOYD_HOARE automaton (currently 48 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 26ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5633states) and FLOYD_HOARE automaton (currently 48 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 42 for 26ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 702856.1ms, OverallIterations: 110, TraceHistogramMax: 6, EmptinessCheckTime: 358.4ms, AutomataDifference: 319228.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4887 SDtfs, 35153 SDslu, 74571 SDs, 0 SdLazy, 153288 SolverSat, 10962 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 71269.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11155 GetRequests, 2542 SyntacticMatches, 37 SemanticMatches, 8575 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235787 ImplicationChecksByTransitivity, 273565.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5637occurred in iteration=108, InterpolantAutomatonStates: 6242, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4112.6ms AutomataMinimizationTime, 109 MinimizatonAttempts, 135054 StatesRemovedByMinimization, 109 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 350.0ms SsaConstructionTime, 1967.6ms SatisfiabilityAnalysisTime, 127485.5ms InterpolantComputationTime, 7228 NumberOfCodeBlocks, 7228 NumberOfCodeBlocksAsserted, 513 NumberOfCheckSat, 7010 ConstructedInterpolants, 2 QuantifiedInterpolants, 88119 SizeOfPredicates, 375 NumberOfNonLiveVariables, 8077 ConjunctsInSsa, 2632 ConjunctsInUnsatCore, 218 InterpolantComputations, 2 PerfectInterpolantSequences, 430/9699 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