/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/queue-add-3-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:33:27,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:33:27,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:33:27,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:33:27,852 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 15:33:27,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:33:27,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:33:27,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:33:27,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:33:27,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:33:27,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:33:27,898 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:33:27,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:33:27,898 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:33:27,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:33:27,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:33:27,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:33:27,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:33:27,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:33:27,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:33:27,900 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:33:27,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:33:27,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:33:27,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:33:27,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:33:27,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:33:27,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:33:27,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:33:27,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:33:27,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:33:27,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:33:27,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:33:27,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:33:27,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:33:27,902 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:33:27,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:33:27,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:33:28,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:33:28,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:33:28,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:33:28,229 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:33:28,232 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:33:28,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl [2021-08-06 15:33:28,234 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl' [2021-08-06 15:33:28,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:33:28,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:33:28,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:33:28,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:33:28,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:33:28,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:33:28,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:33:28,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:33:28,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:33:28,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:33:28,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:33:28,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:33:28,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:33:28,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/1) ... [2021-08-06 15:33:28,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:33:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:28,646 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 15:33:28,665 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 15:33:28,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:33:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:33:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:33:28,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:33:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:33:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:33:28,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:33:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:33:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:33:28,686 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:33:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:33:28,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:33:28,689 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 15:33:28,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:33:28,945 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:33:28,947 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:33:28 BoogieIcfgContainer [2021-08-06 15:33:28,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:33:28,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:33:28,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:33:28,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:33:28,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:28" (1/2) ... [2021-08-06 15:33:28,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21dbee00 and model type queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:33:28, skipping insertion in model container [2021-08-06 15:33:28,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:33:28" (2/2) ... [2021-08-06 15:33:28,953 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3-nl.wvr.bpl [2021-08-06 15:33:28,962 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:33:28,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:33:28,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:33:28,963 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:33:29,034 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:33:29,085 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:33:29,094 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 15:33:29,096 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:33:29,107 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-08-06 15:33:29,187 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:33:29,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:29,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:29,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:29,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1996667167, now seen corresponding path program 1 times [2021-08-06 15:33:29,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:29,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589503711] [2021-08-06 15:33:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:29,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:29,374 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 15:33:29,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:29,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589503711] [2021-08-06 15:33:29,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589503711] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:29,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:29,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:33:29,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816903995] [2021-08-06 15:33:29,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:33:29,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:33:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:33:29,398 INFO L87 Difference]: Start difference. First operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:29,455 INFO L93 Difference]: Finished difference Result 1112 states and 3308 transitions. [2021-08-06 15:33:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:33:29,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:33:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:29,483 INFO L225 Difference]: With dead ends: 1112 [2021-08-06 15:33:29,483 INFO L226 Difference]: Without dead ends: 1112 [2021-08-06 15:33:29,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:33:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-08-06 15:33:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2021-08-06 15:33:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9774977497749773) internal successors, (3308), 1111 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3308 transitions. [2021-08-06 15:33:29,597 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3308 transitions. Word has length 22 [2021-08-06 15:33:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:29,597 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3308 transitions. [2021-08-06 15:33:29,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3308 transitions. [2021-08-06 15:33:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:29,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:29,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:33:29,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:29,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:29,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1213084767, now seen corresponding path program 1 times [2021-08-06 15:33:29,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:29,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049674131] [2021-08-06 15:33:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:29,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:29,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:29,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049674131] [2021-08-06 15:33:29,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049674131] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:29,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:29,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:33:29,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017883256] [2021-08-06 15:33:29,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:33:29,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:33:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:33:29,648 INFO L87 Difference]: Start difference. First operand 1112 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:29,666 INFO L93 Difference]: Finished difference Result 1165 states and 3465 transitions. [2021-08-06 15:33:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:33:29,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:33:29,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:29,674 INFO L225 Difference]: With dead ends: 1165 [2021-08-06 15:33:29,674 INFO L226 Difference]: Without dead ends: 1165 [2021-08-06 15:33:29,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:33:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-08-06 15:33:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-08-06 15:33:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.9768041237113403) internal successors, (3465), 1164 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3465 transitions. [2021-08-06 15:33:29,714 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3465 transitions. Word has length 28 [2021-08-06 15:33:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:29,714 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3465 transitions. [2021-08-06 15:33:29,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3465 transitions. [2021-08-06 15:33:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:29,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:29,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:29,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:33:29,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash -989860967, now seen corresponding path program 2 times [2021-08-06 15:33:29,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:29,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877842255] [2021-08-06 15:33:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:29,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:29,760 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 15:33:29,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:29,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877842255] [2021-08-06 15:33:29,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877842255] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:29,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:29,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:33:29,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264496877] [2021-08-06 15:33:29,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:33:29,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:33:29,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:33:29,763 INFO L87 Difference]: Start difference. First operand 1165 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:29,782 INFO L93 Difference]: Finished difference Result 1281 states and 3812 transitions. [2021-08-06 15:33:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:33:29,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:33:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:29,790 INFO L225 Difference]: With dead ends: 1281 [2021-08-06 15:33:29,791 INFO L226 Difference]: Without dead ends: 1281 [2021-08-06 15:33:29,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:33:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-08-06 15:33:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-08-06 15:33:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.978125) internal successors, (3812), 1280 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3812 transitions. [2021-08-06 15:33:29,828 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3812 transitions. Word has length 28 [2021-08-06 15:33:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:29,829 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 3812 transitions. [2021-08-06 15:33:29,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3812 transitions. [2021-08-06 15:33:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:29,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:29,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:29,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:33:29,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 416907713, now seen corresponding path program 1 times [2021-08-06 15:33:29,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:29,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690178115] [2021-08-06 15:33:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:29,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:30,503 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 15:33:30,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:30,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690178115] [2021-08-06 15:33:30,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690178115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:30,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545456234] [2021-08-06 15:33:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:30,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:30,516 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 15:33:30,521 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 15:33:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:30,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:33:30,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:31,795 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 15:33:31,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545456234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:31,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:31,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:33:31,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993271428] [2021-08-06 15:33:31,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:33:31,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:33:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:33:31,799 INFO L87 Difference]: Start difference. First operand 1281 states and 3812 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:32,649 INFO L93 Difference]: Finished difference Result 2269 states and 6580 transitions. [2021-08-06 15:33:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:33:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:32,662 INFO L225 Difference]: With dead ends: 2269 [2021-08-06 15:33:32,662 INFO L226 Difference]: Without dead ends: 2254 [2021-08-06 15:33:32,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:33:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-08-06 15:33:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1446. [2021-08-06 15:33:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.9577854671280277) internal successors, (4274), 1445 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4274 transitions. [2021-08-06 15:33:32,708 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4274 transitions. Word has length 33 [2021-08-06 15:33:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:32,708 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4274 transitions. [2021-08-06 15:33:32,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4274 transitions. [2021-08-06 15:33:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:32,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:32,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:32,742 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 15:33:32,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:32,929 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash -351824383, now seen corresponding path program 2 times [2021-08-06 15:33:32,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:32,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904469892] [2021-08-06 15:33:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:32,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:33,351 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 15:33:33,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:33,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904469892] [2021-08-06 15:33:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904469892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:33,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695086689] [2021-08-06 15:33:33,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:33,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:33,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:33,353 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 15:33:33,385 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 15:33:33,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:33,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:33,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:33:33,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:34,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:33:34,530 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 15:33:34,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695086689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:34,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:34,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:33:34,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259446550] [2021-08-06 15:33:34,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:34,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:34,532 INFO L87 Difference]: Start difference. First operand 1446 states and 4274 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:35,251 INFO L93 Difference]: Finished difference Result 2055 states and 6003 transitions. [2021-08-06 15:33:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:33:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:35,261 INFO L225 Difference]: With dead ends: 2055 [2021-08-06 15:33:35,262 INFO L226 Difference]: Without dead ends: 2036 [2021-08-06 15:33:35,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 640.6ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:33:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-08-06 15:33:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1460. [2021-08-06 15:33:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.9588759424263196) internal successors, (4317), 1459 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4317 transitions. [2021-08-06 15:33:35,335 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4317 transitions. Word has length 33 [2021-08-06 15:33:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:35,335 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4317 transitions. [2021-08-06 15:33:35,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4317 transitions. [2021-08-06 15:33:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:35,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:35,341 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:35,362 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 15:33:35,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:35,550 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:35,551 INFO L82 PathProgramCache]: Analyzing trace with hash 524358081, now seen corresponding path program 3 times [2021-08-06 15:33:35,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:35,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628135340] [2021-08-06 15:33:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:35,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:35,935 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 15:33:35,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:35,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628135340] [2021-08-06 15:33:35,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628135340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:35,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784643309] [2021-08-06 15:33:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:35,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:35,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:35,941 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 15:33:35,968 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 15:33:36,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:33:36,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:33:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:36,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:33:37,153 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 15:33:37,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784643309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:37,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:37,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:33:37,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260837709] [2021-08-06 15:33:37,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:37,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:37,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:37,156 INFO L87 Difference]: Start difference. First operand 1460 states and 4317 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:38,027 INFO L93 Difference]: Finished difference Result 1869 states and 5410 transitions. [2021-08-06 15:33:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:33:38,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:38,037 INFO L225 Difference]: With dead ends: 1869 [2021-08-06 15:33:38,038 INFO L226 Difference]: Without dead ends: 1854 [2021-08-06 15:33:38,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 779.7ms TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:33:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-06 15:33:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1458. [2021-08-06 15:33:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.959505833905285) internal successors, (4312), 1457 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4312 transitions. [2021-08-06 15:33:38,075 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4312 transitions. Word has length 33 [2021-08-06 15:33:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:38,075 INFO L470 AbstractCegarLoop]: Abstraction has 1458 states and 4312 transitions. [2021-08-06 15:33:38,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4312 transitions. [2021-08-06 15:33:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:38,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:38,080 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:38,108 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 15:33:38,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:38,301 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash -210109243, now seen corresponding path program 4 times [2021-08-06 15:33:38,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:38,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328024113] [2021-08-06 15:33:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:38,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:38,743 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 15:33:38,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:38,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328024113] [2021-08-06 15:33:38,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328024113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:38,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652129410] [2021-08-06 15:33:38,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:38,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:38,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:38,745 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 15:33:38,746 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 15:33:39,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:39,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:39,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:33:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:39,910 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 15:33:39,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652129410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:39,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:39,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:33:39,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610076702] [2021-08-06 15:33:39,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:33:39,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:33:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:33:39,912 INFO L87 Difference]: Start difference. First operand 1458 states and 4312 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:40,756 INFO L93 Difference]: Finished difference Result 2568 states and 7386 transitions. [2021-08-06 15:33:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:33:40,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:40,768 INFO L225 Difference]: With dead ends: 2568 [2021-08-06 15:33:40,768 INFO L226 Difference]: Without dead ends: 2553 [2021-08-06 15:33:40,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 743.3ms TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:33:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-08-06 15:33:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1477. [2021-08-06 15:33:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-08-06 15:33:40,812 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-08-06 15:33:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:40,813 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-08-06 15:33:40,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-08-06 15:33:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:40,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:40,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:40,843 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 15:33:41,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:41,041 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:41,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1493256703, now seen corresponding path program 5 times [2021-08-06 15:33:41,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:41,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302580798] [2021-08-06 15:33:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:41,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:41,361 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 15:33:41,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:41,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302580798] [2021-08-06 15:33:41,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302580798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:41,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085565842] [2021-08-06 15:33:41,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:41,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:41,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:41,363 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 15:33:41,363 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 15:33:41,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:41,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:33:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:42,560 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 15:33:42,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085565842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:42,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:42,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:33:42,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608999954] [2021-08-06 15:33:42,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:33:42,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:33:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:33:42,562 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:43,263 INFO L93 Difference]: Finished difference Result 2510 states and 7227 transitions. [2021-08-06 15:33:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:33:43,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:43,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:43,275 INFO L225 Difference]: With dead ends: 2510 [2021-08-06 15:33:43,275 INFO L226 Difference]: Without dead ends: 2495 [2021-08-06 15:33:43,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 686.0ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:33:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-08-06 15:33:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1477. [2021-08-06 15:33:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-08-06 15:33:43,331 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-08-06 15:33:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:43,332 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-08-06 15:33:43,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-08-06 15:33:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:43,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:43,336 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:43,364 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 15:33:43,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:43,562 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1209675547, now seen corresponding path program 6 times [2021-08-06 15:33:43,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:43,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421437533] [2021-08-06 15:33:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:43,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:43,914 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 15:33:43,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:43,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421437533] [2021-08-06 15:33:43,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421437533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:43,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227844516] [2021-08-06 15:33:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:43,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:43,915 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 15:33:43,916 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 15:33:44,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:33:44,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:33:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:45,114 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 15:33:45,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227844516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:45,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:45,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:33:45,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163090619] [2021-08-06 15:33:45,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:33:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:33:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:33:45,116 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:45,705 INFO L93 Difference]: Finished difference Result 2459 states and 7118 transitions. [2021-08-06 15:33:45,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:33:45,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:45,716 INFO L225 Difference]: With dead ends: 2459 [2021-08-06 15:33:45,716 INFO L226 Difference]: Without dead ends: 2444 [2021-08-06 15:33:45,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:33:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-08-06 15:33:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1561. [2021-08-06 15:33:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.943589743589744) internal successors, (4592), 1560 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4592 transitions. [2021-08-06 15:33:45,759 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4592 transitions. Word has length 33 [2021-08-06 15:33:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:45,759 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 4592 transitions. [2021-08-06 15:33:45,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4592 transitions. [2021-08-06 15:33:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:45,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:45,763 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:45,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:45,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:45,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1245308595, now seen corresponding path program 7 times [2021-08-06 15:33:45,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:45,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751617534] [2021-08-06 15:33:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:45,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:46,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:46,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751617534] [2021-08-06 15:33:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751617534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:46,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191028992] [2021-08-06 15:33:46,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:46,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:46,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:46,321 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 15:33:46,322 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 15:33:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:33:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:47,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191028992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:47,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:47,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:33:47,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088751600] [2021-08-06 15:33:47,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:33:47,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:33:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:33:47,585 INFO L87 Difference]: Start difference. First operand 1561 states and 4592 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:48,414 INFO L93 Difference]: Finished difference Result 2207 states and 6308 transitions. [2021-08-06 15:33:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:33:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:48,429 INFO L225 Difference]: With dead ends: 2207 [2021-08-06 15:33:48,429 INFO L226 Difference]: Without dead ends: 2192 [2021-08-06 15:33:48,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 847.1ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:33:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-08-06 15:33:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1624. [2021-08-06 15:33:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.9457794208256316) internal successors, (4781), 1623 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4781 transitions. [2021-08-06 15:33:48,467 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4781 transitions. Word has length 33 [2021-08-06 15:33:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:48,467 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 4781 transitions. [2021-08-06 15:33:48,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4781 transitions. [2021-08-06 15:33:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:48,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:48,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:48,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:48,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:48,685 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1474067439, now seen corresponding path program 8 times [2021-08-06 15:33:48,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:48,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979962245] [2021-08-06 15:33:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:48,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:49,017 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 15:33:49,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:49,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979962245] [2021-08-06 15:33:49,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979962245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:49,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236122582] [2021-08-06 15:33:49,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:49,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:49,018 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 15:33:49,019 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 15:33:49,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:49,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:33:49,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:49,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:33:50,285 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 15:33:50,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236122582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:50,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:50,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:33:50,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291779789] [2021-08-06 15:33:50,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:50,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:50,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:50,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:50,287 INFO L87 Difference]: Start difference. First operand 1624 states and 4781 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:33:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:50,909 INFO L93 Difference]: Finished difference Result 2231 states and 6489 transitions. [2021-08-06 15:33:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:33:50,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:33:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:50,916 INFO L225 Difference]: With dead ends: 2231 [2021-08-06 15:33:50,916 INFO L226 Difference]: Without dead ends: 2216 [2021-08-06 15:33:50,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:33:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-08-06 15:33:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1666. [2021-08-06 15:33:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.926126126126126) internal successors, (4872), 1665 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 4872 transitions. [2021-08-06 15:33:50,960 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 4872 transitions. Word has length 33 [2021-08-06 15:33:50,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:50,961 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 4872 transitions. [2021-08-06 15:33:50,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:33:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 4872 transitions. [2021-08-06 15:33:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:50,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:50,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:50,993 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 15:33:51,188 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,SelfDestructingSolverStorable10 [2021-08-06 15:33:51,189 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1874168057, now seen corresponding path program 9 times [2021-08-06 15:33:51,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:51,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437792895] [2021-08-06 15:33:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:51,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:51,529 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 15:33:51,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:51,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437792895] [2021-08-06 15:33:51,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437792895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:51,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763497390] [2021-08-06 15:33:51,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:51,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:51,530 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 15:33:51,531 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 15:33:52,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:33:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:33:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:52,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:33:52,913 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 15:33:52,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763497390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:52,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:52,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:33:52,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487335536] [2021-08-06 15:33:52,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:52,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:52,915 INFO L87 Difference]: Start difference. First operand 1666 states and 4872 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:33:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:53,510 INFO L93 Difference]: Finished difference Result 2618 states and 7539 transitions. [2021-08-06 15:33:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:33:53,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:33:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:53,516 INFO L225 Difference]: With dead ends: 2618 [2021-08-06 15:33:53,516 INFO L226 Difference]: Without dead ends: 2603 [2021-08-06 15:33:53,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:33:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-08-06 15:33:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1708. [2021-08-06 15:33:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-08-06 15:33:53,571 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-08-06 15:33:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:53,571 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-08-06 15:33:53,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:33:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-08-06 15:33:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:53,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:53,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:53,603 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 15:33:53,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:53,793 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:53,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1719730539, now seen corresponding path program 10 times [2021-08-06 15:33:53,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:53,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342077369] [2021-08-06 15:33:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:53,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:54,109 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 15:33:54,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:54,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342077369] [2021-08-06 15:33:54,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342077369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:54,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713211465] [2021-08-06 15:33:54,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:54,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:54,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:54,111 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 15:33:54,112 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 15:33:54,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:54,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:54,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:33:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:55,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713211465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:55,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:55,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:33:55,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117298892] [2021-08-06 15:33:55,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:33:55,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:55,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:33:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:33:55,519 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:56,196 INFO L93 Difference]: Finished difference Result 2631 states and 7576 transitions. [2021-08-06 15:33:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:33:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:56,204 INFO L225 Difference]: With dead ends: 2631 [2021-08-06 15:33:56,204 INFO L226 Difference]: Without dead ends: 2616 [2021-08-06 15:33:56,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:33:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-08-06 15:33:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1708. [2021-08-06 15:33:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-08-06 15:33:56,255 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-08-06 15:33:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-08-06 15:33:56,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-08-06 15:33:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:56,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:56,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:56,289 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 15:33:56,484 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,SelfDestructingSolverStorable12 [2021-08-06 15:33:56,485 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -679839295, now seen corresponding path program 11 times [2021-08-06 15:33:56,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:56,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541432958] [2021-08-06 15:33:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:56,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:56,813 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 15:33:56,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:56,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541432958] [2021-08-06 15:33:56,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541432958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:56,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235882515] [2021-08-06 15:33:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:56,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:56,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:56,820 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 15:33:56,831 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 15:33:57,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:57,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:57,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:33:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:58,225 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 15:33:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235882515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:58,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:33:58,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025372767] [2021-08-06 15:33:58,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:58,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:58,226 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:59,018 INFO L93 Difference]: Finished difference Result 2176 states and 6261 transitions. [2021-08-06 15:33:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:33:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:33:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:59,025 INFO L225 Difference]: With dead ends: 2176 [2021-08-06 15:33:59,025 INFO L226 Difference]: Without dead ends: 2157 [2021-08-06 15:33:59,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:33:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-08-06 15:33:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1734. [2021-08-06 15:33:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9272937103289096) internal successors, (5073), 1733 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5073 transitions. [2021-08-06 15:33:59,064 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5073 transitions. Word has length 33 [2021-08-06 15:33:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:59,064 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5073 transitions. [2021-08-06 15:33:59,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5073 transitions. [2021-08-06 15:33:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:33:59,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:59,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:59,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:59,280 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,SelfDestructingSolverStorable13 [2021-08-06 15:33:59,281 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash 196343169, now seen corresponding path program 12 times [2021-08-06 15:33:59,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:59,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538163968] [2021-08-06 15:33:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:59,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:59,602 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 15:33:59,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:59,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538163968] [2021-08-06 15:33:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538163968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:59,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453806433] [2021-08-06 15:33:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:59,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:59,605 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 15:33:59,632 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 15:34:00,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:34:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:00,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:01,403 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 15:34:01,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453806433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:01,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:01,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:01,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846267983] [2021-08-06 15:34:01,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:01,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:01,405 INFO L87 Difference]: Start difference. First operand 1734 states and 5073 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:02,252 INFO L93 Difference]: Finished difference Result 2176 states and 6255 transitions. [2021-08-06 15:34:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:34:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:02,259 INFO L225 Difference]: With dead ends: 2176 [2021-08-06 15:34:02,259 INFO L226 Difference]: Without dead ends: 2161 [2021-08-06 15:34:02,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 855.1ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-08-06 15:34:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1730. [2021-08-06 15:34:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-08-06 15:34:02,309 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-08-06 15:34:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:02,310 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-08-06 15:34:02,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-08-06 15:34:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:02,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:02,314 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:02,341 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 15:34:02,539 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,SelfDestructingSolverStorable14 [2021-08-06 15:34:02,540 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1906792959, now seen corresponding path program 13 times [2021-08-06 15:34:02,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:02,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31061175] [2021-08-06 15:34:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:02,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:02,809 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 15:34:02,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:02,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31061175] [2021-08-06 15:34:02,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31061175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:02,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992570293] [2021-08-06 15:34:02,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:02,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:02,810 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 15:34:02,811 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 15:34:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:03,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:03,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:04,305 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 15:34:04,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992570293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:04,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:04,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:34:04,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887296198] [2021-08-06 15:34:04,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:04,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:04,307 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:04,736 INFO L93 Difference]: Finished difference Result 2313 states and 6721 transitions. [2021-08-06 15:34:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:34:04,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:04,742 INFO L225 Difference]: With dead ends: 2313 [2021-08-06 15:34:04,742 INFO L226 Difference]: Without dead ends: 2294 [2021-08-06 15:34:04,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-08-06 15:34:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1752. [2021-08-06 15:34:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-06 15:34:04,780 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-06 15:34:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:04,780 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-06 15:34:04,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-06 15:34:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:04,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:04,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:04,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:05,009 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,SelfDestructingSolverStorable15 [2021-08-06 15:34:05,009 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash 555256933, now seen corresponding path program 14 times [2021-08-06 15:34:05,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:05,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671756129] [2021-08-06 15:34:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:05,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:05,322 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 15:34:05,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:05,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671756129] [2021-08-06 15:34:05,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671756129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:05,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36454288] [2021-08-06 15:34:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:05,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:05,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:05,324 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 15:34:05,324 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 15:34:06,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:06,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:06,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:07,000 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 15:34:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36454288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:07,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:07,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:07,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461795395] [2021-08-06 15:34:07,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:07,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:07,002 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:07,468 INFO L93 Difference]: Finished difference Result 2339 states and 6772 transitions. [2021-08-06 15:34:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:34:07,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:07,473 INFO L225 Difference]: With dead ends: 2339 [2021-08-06 15:34:07,473 INFO L226 Difference]: Without dead ends: 2324 [2021-08-06 15:34:07,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:34:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-08-06 15:34:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1752. [2021-08-06 15:34:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-06 15:34:07,512 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-06 15:34:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:07,512 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-06 15:34:07,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-06 15:34:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:07,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:07,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:07,545 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 15:34:07,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:07,741 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash -300690715, now seen corresponding path program 15 times [2021-08-06 15:34:07,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:07,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678009127] [2021-08-06 15:34:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:07,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:08,102 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 15:34:08,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678009127] [2021-08-06 15:34:08,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678009127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:08,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606571646] [2021-08-06 15:34:08,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:08,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:08,104 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 15:34:08,105 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 15:34:09,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:34:09,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:09,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:10,022 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 15:34:10,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606571646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:10,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:10,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:10,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719437359] [2021-08-06 15:34:10,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:10,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:10,023 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:10,866 INFO L93 Difference]: Finished difference Result 2279 states and 6498 transitions. [2021-08-06 15:34:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:34:10,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:10,871 INFO L225 Difference]: With dead ends: 2279 [2021-08-06 15:34:10,871 INFO L226 Difference]: Without dead ends: 2264 [2021-08-06 15:34:10,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 877.1ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-08-06 15:34:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1773. [2021-08-06 15:34:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 2.9283295711060946) internal successors, (5189), 1772 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 5189 transitions. [2021-08-06 15:34:10,908 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 5189 transitions. Word has length 33 [2021-08-06 15:34:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:10,908 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 5189 transitions. [2021-08-06 15:34:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 5189 transitions. [2021-08-06 15:34:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:10,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:10,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:10,939 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 15:34:11,128 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,SelfDestructingSolverStorable17 [2021-08-06 15:34:11,129 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1967089301, now seen corresponding path program 16 times [2021-08-06 15:34:11,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:11,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041768633] [2021-08-06 15:34:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:11,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:11,402 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 15:34:11,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:11,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041768633] [2021-08-06 15:34:11,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041768633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:11,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923209885] [2021-08-06 15:34:11,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:11,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:11,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:11,403 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 15:34:11,404 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 15:34:12,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:12,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:13,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923209885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:13,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:13,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:34:13,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498018551] [2021-08-06 15:34:13,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:13,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:13,106 INFO L87 Difference]: Start difference. First operand 1773 states and 5189 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:13,856 INFO L93 Difference]: Finished difference Result 2250 states and 6433 transitions. [2021-08-06 15:34:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:34:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:13,860 INFO L225 Difference]: With dead ends: 2250 [2021-08-06 15:34:13,860 INFO L226 Difference]: Without dead ends: 2235 [2021-08-06 15:34:13,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 650.4ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:34:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-08-06 15:34:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1752. [2021-08-06 15:34:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-06 15:34:13,893 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-06 15:34:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:13,893 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-06 15:34:13,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-06 15:34:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:13,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:13,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:13,925 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 15:34:14,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:14,126 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1441716885, now seen corresponding path program 17 times [2021-08-06 15:34:14,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:14,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376676796] [2021-08-06 15:34:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:14,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:14,408 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 15:34:14,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:14,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376676796] [2021-08-06 15:34:14,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376676796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:14,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376385083] [2021-08-06 15:34:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:14,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:14,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:14,410 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 15:34:14,410 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 15:34:15,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:15,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:16,181 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 15:34:16,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376385083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:16,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:16,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:34:16,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210037301] [2021-08-06 15:34:16,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:16,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:16,182 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:16,840 INFO L93 Difference]: Finished difference Result 2615 states and 7540 transitions. [2021-08-06 15:34:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:34:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:16,845 INFO L225 Difference]: With dead ends: 2615 [2021-08-06 15:34:16,845 INFO L226 Difference]: Without dead ends: 2596 [2021-08-06 15:34:16,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:34:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-06 15:34:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1760. [2021-08-06 15:34:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.920977828311541) internal successors, (5138), 1759 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5138 transitions. [2021-08-06 15:34:16,874 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5138 transitions. Word has length 33 [2021-08-06 15:34:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:16,875 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 5138 transitions. [2021-08-06 15:34:16,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5138 transitions. [2021-08-06 15:34:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:16,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:16,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:16,920 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 15:34:17,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:17,105 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1977067947, now seen corresponding path program 18 times [2021-08-06 15:34:17,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:17,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671773272] [2021-08-06 15:34:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:17,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:17,371 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 15:34:17,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:17,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671773272] [2021-08-06 15:34:17,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671773272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:17,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839068654] [2021-08-06 15:34:17,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:17,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:17,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:17,373 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 15:34:17,373 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 15:34:18,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:34:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:18,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:18,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:19,413 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 15:34:19,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839068654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:19,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:19,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397942847] [2021-08-06 15:34:19,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:19,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:19,415 INFO L87 Difference]: Start difference. First operand 1760 states and 5138 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:20,540 INFO L93 Difference]: Finished difference Result 2325 states and 6704 transitions. [2021-08-06 15:34:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:34:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:20,544 INFO L225 Difference]: With dead ends: 2325 [2021-08-06 15:34:20,544 INFO L226 Difference]: Without dead ends: 2310 [2021-08-06 15:34:20,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1058.9ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:34:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-08-06 15:34:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1752. [2021-08-06 15:34:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-06 15:34:20,570 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-06 15:34:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-06 15:34:20,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-06 15:34:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:20,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:20,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:20,599 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 15:34:20,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:20,789 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:20,789 INFO L82 PathProgramCache]: Analyzing trace with hash -703095831, now seen corresponding path program 19 times [2021-08-06 15:34:20,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:20,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448198243] [2021-08-06 15:34:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:20,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:21,113 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 15:34:21,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:21,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448198243] [2021-08-06 15:34:21,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448198243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:21,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993587733] [2021-08-06 15:34:21,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:21,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:21,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:21,114 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 15:34:21,115 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 15:34:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:23,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993587733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:23,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:23,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:34:23,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519624011] [2021-08-06 15:34:23,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:23,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:23,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:23,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:23,054 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:24,130 INFO L93 Difference]: Finished difference Result 2455 states and 6989 transitions. [2021-08-06 15:34:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:34:24,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:24,135 INFO L225 Difference]: With dead ends: 2455 [2021-08-06 15:34:24,135 INFO L226 Difference]: Without dead ends: 2440 [2021-08-06 15:34:24,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 943.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:34:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-08-06 15:34:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1794. [2021-08-06 15:34:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 2.92526491912995) internal successors, (5245), 1793 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 5245 transitions. [2021-08-06 15:34:24,158 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 5245 transitions. Word has length 33 [2021-08-06 15:34:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:24,158 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 5245 transitions. [2021-08-06 15:34:24,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 5245 transitions. [2021-08-06 15:34:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:24,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:24,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:24,180 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 15:34:24,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:24,362 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1925472879, now seen corresponding path program 20 times [2021-08-06 15:34:24,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:24,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267277483] [2021-08-06 15:34:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:24,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:24,660 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 15:34:24,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:24,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267277483] [2021-08-06 15:34:24,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267277483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:24,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906491281] [2021-08-06 15:34:24,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:24,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:24,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:24,665 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:24,666 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 15:34:25,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:25,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:26,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:26,827 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 15:34:26,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906491281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:26,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:26,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:26,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329788116] [2021-08-06 15:34:26,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:26,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:26,828 INFO L87 Difference]: Start difference. First operand 1794 states and 5245 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:27,490 INFO L93 Difference]: Finished difference Result 2707 states and 7767 transitions. [2021-08-06 15:34:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:34:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:27,495 INFO L225 Difference]: With dead ends: 2707 [2021-08-06 15:34:27,495 INFO L226 Difference]: Without dead ends: 2692 [2021-08-06 15:34:27,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 688.3ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-08-06 15:34:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1752. [2021-08-06 15:34:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-08-06 15:34:27,517 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-08-06 15:34:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:27,518 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-08-06 15:34:27,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-08-06 15:34:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:27,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:27,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:27,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 15:34:27,721 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,SelfDestructingSolverStorable22 [2021-08-06 15:34:27,721 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash 503592163, now seen corresponding path program 21 times [2021-08-06 15:34:27,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:27,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413478730] [2021-08-06 15:34:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:27,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:27,980 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 15:34:27,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:27,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413478730] [2021-08-06 15:34:27,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413478730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:27,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448866217] [2021-08-06 15:34:27,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:27,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:27,987 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 15:34:27,989 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 15:34:29,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:34:29,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:29,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:29,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:30,173 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 15:34:30,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448866217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:30,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:30,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:30,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163686525] [2021-08-06 15:34:30,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:30,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:30,175 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:30,811 INFO L93 Difference]: Finished difference Result 2749 states and 7883 transitions. [2021-08-06 15:34:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:34:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:30,816 INFO L225 Difference]: With dead ends: 2749 [2021-08-06 15:34:30,816 INFO L226 Difference]: Without dead ends: 2730 [2021-08-06 15:34:30,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:34:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-08-06 15:34:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1756. [2021-08-06 15:34:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.920797720797721) internal successors, (5126), 1755 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5126 transitions. [2021-08-06 15:34:30,841 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5126 transitions. Word has length 33 [2021-08-06 15:34:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:30,842 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 5126 transitions. [2021-08-06 15:34:30,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5126 transitions. [2021-08-06 15:34:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:30,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:30,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:30,865 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 15:34:31,048 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,SelfDestructingSolverStorable23 [2021-08-06 15:34:31,049 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:31,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1379774627, now seen corresponding path program 22 times [2021-08-06 15:34:31,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:31,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021549095] [2021-08-06 15:34:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:31,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:31,318 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 15:34:31,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:31,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021549095] [2021-08-06 15:34:31,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021549095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:31,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698798039] [2021-08-06 15:34:31,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:31,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:31,319 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 15:34:31,320 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 15:34:32,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:33,473 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 15:34:33,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698798039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:33,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:33,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:34:33,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982904857] [2021-08-06 15:34:33,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:33,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:33,474 INFO L87 Difference]: Start difference. First operand 1756 states and 5126 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:34,401 INFO L93 Difference]: Finished difference Result 2323 states and 6662 transitions. [2021-08-06 15:34:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:34:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:34,405 INFO L225 Difference]: With dead ends: 2323 [2021-08-06 15:34:34,405 INFO L226 Difference]: Without dead ends: 2308 [2021-08-06 15:34:34,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 780.2ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-08-06 15:34:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1744. [2021-08-06 15:34:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.919104991394148) internal successors, (5088), 1743 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5088 transitions. [2021-08-06 15:34:34,427 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5088 transitions. Word has length 33 [2021-08-06 15:34:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:34,427 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 5088 transitions. [2021-08-06 15:34:34,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5088 transitions. [2021-08-06 15:34:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:34,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:34,431 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:34,450 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 15:34:34,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:34,631 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1508202277, now seen corresponding path program 23 times [2021-08-06 15:34:34,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:34,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537757872] [2021-08-06 15:34:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:34,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:34,906 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 15:34:34,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:34,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537757872] [2021-08-06 15:34:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537757872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:34,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998573157] [2021-08-06 15:34:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:34,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:34,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:34,907 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 15:34:34,908 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 15:34:36,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:36,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:36,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:37,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998573157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:37,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:37,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:34:37,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962593262] [2021-08-06 15:34:37,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:37,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:37,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:37,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:37,128 INFO L87 Difference]: Start difference. First operand 1744 states and 5088 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:38,015 INFO L93 Difference]: Finished difference Result 2266 states and 6481 transitions. [2021-08-06 15:34:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:34:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:38,019 INFO L225 Difference]: With dead ends: 2266 [2021-08-06 15:34:38,019 INFO L226 Difference]: Without dead ends: 2251 [2021-08-06 15:34:38,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:34:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-08-06 15:34:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1765. [2021-08-06 15:34:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.9280045351473922) internal successors, (5165), 1764 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5165 transitions. [2021-08-06 15:34:38,051 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5165 transitions. Word has length 33 [2021-08-06 15:34:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:38,051 INFO L470 AbstractCegarLoop]: Abstraction has 1765 states and 5165 transitions. [2021-08-06 15:34:38,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5165 transitions. [2021-08-06 15:34:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:38,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:38,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:38,087 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 15:34:38,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:38,281 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash -158196309, now seen corresponding path program 24 times [2021-08-06 15:34:38,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:38,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067030665] [2021-08-06 15:34:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:38,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:38,589 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 15:34:38,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:38,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067030665] [2021-08-06 15:34:38,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067030665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:38,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907737307] [2021-08-06 15:34:38,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:38,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:38,591 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 15:34:38,592 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 15:34:40,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:34:40,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:34:40,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:40,948 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 15:34:40,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907737307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:40,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:40,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:40,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565934882] [2021-08-06 15:34:40,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:40,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:40,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:40,949 INFO L87 Difference]: Start difference. First operand 1765 states and 5165 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:41,752 INFO L93 Difference]: Finished difference Result 2604 states and 7487 transitions. [2021-08-06 15:34:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:34:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:41,756 INFO L225 Difference]: With dead ends: 2604 [2021-08-06 15:34:41,757 INFO L226 Difference]: Without dead ends: 2589 [2021-08-06 15:34:41,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-08-06 15:34:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1702. [2021-08-06 15:34:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.9253380364491477) internal successors, (4976), 1701 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4976 transitions. [2021-08-06 15:34:41,778 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4976 transitions. Word has length 33 [2021-08-06 15:34:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:41,778 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 4976 transitions. [2021-08-06 15:34:41,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4976 transitions. [2021-08-06 15:34:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:41,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:41,781 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:41,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 15:34:41,981 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,SelfDestructingSolverStorable26 [2021-08-06 15:34:41,982 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash 758312315, now seen corresponding path program 25 times [2021-08-06 15:34:41,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:41,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796043758] [2021-08-06 15:34:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:41,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:42,280 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 15:34:42,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796043758] [2021-08-06 15:34:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796043758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659174418] [2021-08-06 15:34:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:42,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:42,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:42,281 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 15:34:42,282 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 15:34:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:44,603 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 15:34:44,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659174418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:44,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:44,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:34:44,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989140636] [2021-08-06 15:34:44,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:34:44,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:44,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:34:44,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:34:44,605 INFO L87 Difference]: Start difference. First operand 1702 states and 4976 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:34:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:45,273 INFO L93 Difference]: Finished difference Result 3133 states and 8917 transitions. [2021-08-06 15:34:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:34:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 33 [2021-08-06 15:34:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:45,279 INFO L225 Difference]: With dead ends: 3133 [2021-08-06 15:34:45,279 INFO L226 Difference]: Without dead ends: 3118 [2021-08-06 15:34:45,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:34:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-08-06 15:34:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1726. [2021-08-06 15:34:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.926376811594203) internal successors, (5048), 1725 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5048 transitions. [2021-08-06 15:34:45,312 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5048 transitions. Word has length 33 [2021-08-06 15:34:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:45,312 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 5048 transitions. [2021-08-06 15:34:45,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:34:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5048 transitions. [2021-08-06 15:34:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:45,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:45,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:45,347 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 15:34:45,540 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,SelfDestructingSolverStorable27 [2021-08-06 15:34:45,541 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash -10419781, now seen corresponding path program 26 times [2021-08-06 15:34:45,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:45,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649694870] [2021-08-06 15:34:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:45,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:45,858 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 15:34:45,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:45,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649694870] [2021-08-06 15:34:45,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649694870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:45,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793437542] [2021-08-06 15:34:45,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:45,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:45,865 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 15:34:45,866 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 15:34:47,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:47,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:48,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:48,478 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 15:34:48,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793437542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:48,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:48,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:34:48,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369979414] [2021-08-06 15:34:48,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:48,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:48,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:48,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:48,479 INFO L87 Difference]: Start difference. First operand 1726 states and 5048 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:49,144 INFO L93 Difference]: Finished difference Result 2450 states and 7097 transitions. [2021-08-06 15:34:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:34:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:49,148 INFO L225 Difference]: With dead ends: 2450 [2021-08-06 15:34:49,148 INFO L226 Difference]: Without dead ends: 2431 [2021-08-06 15:34:49,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 587.1ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:34:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-08-06 15:34:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1738. [2021-08-06 15:34:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.9280368451352907) internal successors, (5086), 1737 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5086 transitions. [2021-08-06 15:34:49,171 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5086 transitions. Word has length 33 [2021-08-06 15:34:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:49,171 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 5086 transitions. [2021-08-06 15:34:49,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5086 transitions. [2021-08-06 15:34:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:49,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:49,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:49,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:49,380 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,SelfDestructingSolverStorable28 [2021-08-06 15:34:49,380 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 865762683, now seen corresponding path program 27 times [2021-08-06 15:34:49,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:49,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556264780] [2021-08-06 15:34:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:49,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:49,698 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 15:34:49,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:49,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556264780] [2021-08-06 15:34:49,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556264780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:49,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422878299] [2021-08-06 15:34:49,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:49,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:49,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:49,700 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 15:34:49,701 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 15:34:51,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:34:51,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:34:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:51,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:34:52,308 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 15:34:52,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422878299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:52,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:52,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:34:52,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956176068] [2021-08-06 15:34:52,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:52,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:52,310 INFO L87 Difference]: Start difference. First operand 1738 states and 5086 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:53,183 INFO L93 Difference]: Finished difference Result 2236 states and 6437 transitions. [2021-08-06 15:34:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:34:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:34:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:53,187 INFO L225 Difference]: With dead ends: 2236 [2021-08-06 15:34:53,187 INFO L226 Difference]: Without dead ends: 2221 [2021-08-06 15:34:53,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 798.6ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:34:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-08-06 15:34:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1734. [2021-08-06 15:34:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9267166762839008) internal successors, (5072), 1733 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5072 transitions. [2021-08-06 15:34:53,218 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5072 transitions. Word has length 33 [2021-08-06 15:34:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:53,218 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5072 transitions. [2021-08-06 15:34:53,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5072 transitions. [2021-08-06 15:34:53,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:53,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:53,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:53,255 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 15:34:53,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:53,449 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 131295359, now seen corresponding path program 28 times [2021-08-06 15:34:53,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:53,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202744151] [2021-08-06 15:34:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:53,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:53,792 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 15:34:53,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:53,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202744151] [2021-08-06 15:34:53,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202744151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:53,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755552353] [2021-08-06 15:34:53,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:53,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:53,794 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 15:34:53,816 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 15:34:55,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:55,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:56,329 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 15:34:56,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755552353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:56,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:56,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:34:56,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560476333] [2021-08-06 15:34:56,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:34:56,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:34:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:34:56,330 INFO L87 Difference]: Start difference. First operand 1734 states and 5072 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:34:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:57,135 INFO L93 Difference]: Finished difference Result 3027 states and 8657 transitions. [2021-08-06 15:34:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:34:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 33 [2021-08-06 15:34:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:57,140 INFO L225 Difference]: With dead ends: 3027 [2021-08-06 15:34:57,140 INFO L226 Difference]: Without dead ends: 3012 [2021-08-06 15:34:57,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 811.4ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:34:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-08-06 15:34:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1730. [2021-08-06 15:34:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.926547137073453) internal successors, (5060), 1729 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5060 transitions. [2021-08-06 15:34:57,165 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5060 transitions. Word has length 33 [2021-08-06 15:34:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:57,165 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5060 transitions. [2021-08-06 15:34:57,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:34:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5060 transitions. [2021-08-06 15:34:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:34:57,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:57,168 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:34:57,190 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 15:34:57,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:57,371 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1151852101, now seen corresponding path program 29 times [2021-08-06 15:34:57,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:57,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244140140] [2021-08-06 15:34:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:57,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:57,722 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 15:34:57,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:57,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244140140] [2021-08-06 15:34:57,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244140140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:57,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557885944] [2021-08-06 15:34:57,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:57,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:57,723 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 15:34:57,724 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 15:34:59,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:59,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:59,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:34:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:00,299 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 15:35:00,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557885944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:00,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:00,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:35:00,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710058730] [2021-08-06 15:35:00,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:35:00,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:35:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:35:00,300 INFO L87 Difference]: Start difference. First operand 1730 states and 5060 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:01,096 INFO L93 Difference]: Finished difference Result 3089 states and 8805 transitions. [2021-08-06 15:35:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:35:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 33 [2021-08-06 15:35:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:01,102 INFO L225 Difference]: With dead ends: 3089 [2021-08-06 15:35:01,103 INFO L226 Difference]: Without dead ends: 3074 [2021-08-06 15:35:01,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 799.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:35:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-08-06 15:35:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 1710. [2021-08-06 15:35:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.925687536571094) internal successors, (5000), 1709 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5000 transitions. [2021-08-06 15:35:01,142 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5000 transitions. Word has length 33 [2021-08-06 15:35:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:01,142 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5000 transitions. [2021-08-06 15:35:01,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5000 transitions. [2021-08-06 15:35:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:01,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:01,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:01,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:01,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:01,361 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1721940609, now seen corresponding path program 30 times [2021-08-06 15:35:01,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:01,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391095069] [2021-08-06 15:35:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:01,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:01,676 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 15:35:01,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:01,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391095069] [2021-08-06 15:35:01,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391095069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:01,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358961391] [2021-08-06 15:35:01,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:01,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:01,681 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 15:35:01,682 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 15:35:03,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:35:03,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:03,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:35:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:04,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:35:04,514 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 15:35:04,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358961391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:04,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:04,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:35:04,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759547600] [2021-08-06 15:35:04,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:35:04,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:35:04,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:35:04,516 INFO L87 Difference]: Start difference. First operand 1710 states and 5000 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 15:35:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:05,079 INFO L93 Difference]: Finished difference Result 2950 states and 8450 transitions. [2021-08-06 15:35:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:35:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 33 [2021-08-06 15:35:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:05,084 INFO L225 Difference]: With dead ends: 2950 [2021-08-06 15:35:05,084 INFO L226 Difference]: Without dead ends: 2935 [2021-08-06 15:35:05,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 593.5ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:35:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-08-06 15:35:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 1731. [2021-08-06 15:35:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.921387283236994) internal successors, (5054), 1730 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5054 transitions. [2021-08-06 15:35:05,129 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5054 transitions. Word has length 33 [2021-08-06 15:35:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:05,129 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 5054 transitions. [2021-08-06 15:35:05,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 15:35:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5054 transitions. [2021-08-06 15:35:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:05,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:05,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:05,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:05,345 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,SelfDestructingSolverStorable32 [2021-08-06 15:35:05,345 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash -485112675, now seen corresponding path program 31 times [2021-08-06 15:35:05,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:05,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825706945] [2021-08-06 15:35:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:05,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:05,694 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 15:35:05,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:05,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825706945] [2021-08-06 15:35:05,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825706945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:05,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686089488] [2021-08-06 15:35:05,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:05,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:05,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:05,697 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 15:35:05,726 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 15:35:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:35:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:08,529 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 15:35:08,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686089488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:08,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:08,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:35:08,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240639596] [2021-08-06 15:35:08,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:35:08,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:35:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:35:08,531 INFO L87 Difference]: Start difference. First operand 1731 states and 5054 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:09,290 INFO L93 Difference]: Finished difference Result 3320 states and 9395 transitions. [2021-08-06 15:35:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:35:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 33 [2021-08-06 15:35:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:09,296 INFO L225 Difference]: With dead ends: 3320 [2021-08-06 15:35:09,296 INFO L226 Difference]: Without dead ends: 3305 [2021-08-06 15:35:09,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:35:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2021-08-06 15:35:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 1768. [2021-08-06 15:35:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-08-06 15:35:09,334 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-08-06 15:35:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:09,335 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-08-06 15:35:09,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-08-06 15:35:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:09,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:09,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:09,371 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 15:35:09,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:09,553 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash 68792961, now seen corresponding path program 32 times [2021-08-06 15:35:09,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:09,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254913518] [2021-08-06 15:35:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:09,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:09,898 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 15:35:09,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:09,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254913518] [2021-08-06 15:35:09,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254913518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:09,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545736855] [2021-08-06 15:35:09,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:09,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:09,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:09,900 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 15:35:09,900 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 15:35:11,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:11,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:11,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:35:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:12,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:35:12,861 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 15:35:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545736855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:12,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:12,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:35:12,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669775128] [2021-08-06 15:35:12,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:35:12,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:35:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:35:12,862 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:35:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:13,516 INFO L93 Difference]: Finished difference Result 3021 states and 8616 transitions. [2021-08-06 15:35:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:35:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:35:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:13,521 INFO L225 Difference]: With dead ends: 3021 [2021-08-06 15:35:13,522 INFO L226 Difference]: Without dead ends: 3006 [2021-08-06 15:35:13,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:35:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-08-06 15:35:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1852. [2021-08-06 15:35:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.902215018908698) internal successors, (5372), 1851 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5372 transitions. [2021-08-06 15:35:13,546 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5372 transitions. Word has length 33 [2021-08-06 15:35:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:13,547 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 5372 transitions. [2021-08-06 15:35:13,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:35:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5372 transitions. [2021-08-06 15:35:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:13,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:13,549 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:13,574 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 15:35:13,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:13,750 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:13,750 INFO L82 PathProgramCache]: Analyzing trace with hash 226317897, now seen corresponding path program 33 times [2021-08-06 15:35:13,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:13,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244080398] [2021-08-06 15:35:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:13,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:14,079 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 15:35:14,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:14,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244080398] [2021-08-06 15:35:14,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244080398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:14,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656395197] [2021-08-06 15:35:14,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:14,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:14,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:14,080 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 15:35:14,108 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 15:35:16,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:35:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:35:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:16,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:35:17,162 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 15:35:17,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656395197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:17,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:17,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:35:17,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459655532] [2021-08-06 15:35:17,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:35:17,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:35:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:35:17,164 INFO L87 Difference]: Start difference. First operand 1852 states and 5372 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:35:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:18,045 INFO L93 Difference]: Finished difference Result 2567 states and 7275 transitions. [2021-08-06 15:35:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:35:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:35:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:18,049 INFO L225 Difference]: With dead ends: 2567 [2021-08-06 15:35:18,049 INFO L226 Difference]: Without dead ends: 2552 [2021-08-06 15:35:18,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 863.0ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:35:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-08-06 15:35:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1915. [2021-08-06 15:35:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9054336468129573) internal successors, (5561), 1914 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5561 transitions. [2021-08-06 15:35:18,073 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5561 transitions. Word has length 33 [2021-08-06 15:35:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:18,073 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 5561 transitions. [2021-08-06 15:35:18,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:35:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5561 transitions. [2021-08-06 15:35:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:18,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:18,076 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:18,105 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 15:35:18,298 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,SelfDestructingSolverStorable35 [2021-08-06 15:35:18,298 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2440947, now seen corresponding path program 34 times [2021-08-06 15:35:18,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:18,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174435453] [2021-08-06 15:35:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:18,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:18,599 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 15:35:18,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:18,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174435453] [2021-08-06 15:35:18,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174435453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:18,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037748415] [2021-08-06 15:35:18,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:18,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:18,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:18,601 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 15:35:18,601 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 15:35:20,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:35:20,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:21,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037748415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:21,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:21,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:35:21,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199298133] [2021-08-06 15:35:21,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:35:21,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:35:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:35:21,566 INFO L87 Difference]: Start difference. First operand 1915 states and 5561 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:22,226 INFO L93 Difference]: Finished difference Result 3010 states and 8552 transitions. [2021-08-06 15:35:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:35:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 33 [2021-08-06 15:35:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:22,230 INFO L225 Difference]: With dead ends: 3010 [2021-08-06 15:35:22,230 INFO L226 Difference]: Without dead ends: 2995 [2021-08-06 15:35:22,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:35:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-08-06 15:35:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1894. [2021-08-06 15:35:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.8969889064976226) internal successors, (5484), 1893 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5484 transitions. [2021-08-06 15:35:22,255 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5484 transitions. Word has length 33 [2021-08-06 15:35:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:22,255 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 5484 transitions. [2021-08-06 15:35:22,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5484 transitions. [2021-08-06 15:35:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:22,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:22,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:22,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 15:35:22,458 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,SelfDestructingSolverStorable36 [2021-08-06 15:35:22,459 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -949172747, now seen corresponding path program 35 times [2021-08-06 15:35:22,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:22,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129380198] [2021-08-06 15:35:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:22,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:22,774 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 15:35:22,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:22,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129380198] [2021-08-06 15:35:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129380198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:22,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744674899] [2021-08-06 15:35:22,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:22,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:22,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:22,775 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 15:35:22,776 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 15:35:25,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:25,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:25,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:35:25,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:25,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744674899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:25,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:25,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:35:25,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263860840] [2021-08-06 15:35:25,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:35:25,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:25,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:35:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:35:25,851 INFO L87 Difference]: Start difference. First operand 1894 states and 5484 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:26,631 INFO L93 Difference]: Finished difference Result 3039 states and 8670 transitions. [2021-08-06 15:35:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:35:26,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 33 [2021-08-06 15:35:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:26,635 INFO L225 Difference]: With dead ends: 3039 [2021-08-06 15:35:26,635 INFO L226 Difference]: Without dead ends: 3024 [2021-08-06 15:35:26,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:35:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-08-06 15:35:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1873. [2021-08-06 15:35:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.8995726495726495) internal successors, (5428), 1872 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 5428 transitions. [2021-08-06 15:35:26,663 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 5428 transitions. Word has length 33 [2021-08-06 15:35:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:26,663 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 5428 transitions. [2021-08-06 15:35:26,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 15:35:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 5428 transitions. [2021-08-06 15:35:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:26,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:26,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:26,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 15:35:26,880 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,SelfDestructingSolverStorable37 [2021-08-06 15:35:26,881 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:26,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:26,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1103610265, now seen corresponding path program 36 times [2021-08-06 15:35:26,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:26,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846266392] [2021-08-06 15:35:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:26,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:27,212 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 15:35:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846266392] [2021-08-06 15:35:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846266392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675148785] [2021-08-06 15:35:27,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:27,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:27,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:27,216 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 15:35:27,217 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 15:35:29,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:35:29,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:29,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:35:29,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:29,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:35:30,506 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 15:35:30,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675148785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:30,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:30,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:35:30,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999070584] [2021-08-06 15:35:30,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:35:30,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:35:30,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:35:30,507 INFO L87 Difference]: Start difference. First operand 1873 states and 5428 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:35:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:31,125 INFO L93 Difference]: Finished difference Result 2990 states and 8536 transitions. [2021-08-06 15:35:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:35:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:35:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:31,130 INFO L225 Difference]: With dead ends: 2990 [2021-08-06 15:35:31,130 INFO L226 Difference]: Without dead ends: 2975 [2021-08-06 15:35:31,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:35:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-08-06 15:35:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 1768. [2021-08-06 15:35:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-08-06 15:35:31,153 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-08-06 15:35:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:31,154 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-08-06 15:35:31,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:35:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-08-06 15:35:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:31,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:31,156 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:31,179 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 15:35:31,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 15:35:31,356 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 603202051, now seen corresponding path program 37 times [2021-08-06 15:35:31,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:31,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754297894] [2021-08-06 15:35:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:31,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:31,659 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 15:35:31,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:31,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754297894] [2021-08-06 15:35:31,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754297894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:31,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28491897] [2021-08-06 15:35:31,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:31,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:31,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:31,665 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 15:35:31,666 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 15:35:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:35:34,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:34,773 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 15:35:34,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28491897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:34,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:34,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:35:34,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692785019] [2021-08-06 15:35:34,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:35:34,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:35:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:35:34,774 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:35,338 INFO L93 Difference]: Finished difference Result 2915 states and 8366 transitions. [2021-08-06 15:35:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:35:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:35:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:35,343 INFO L225 Difference]: With dead ends: 2915 [2021-08-06 15:35:35,344 INFO L226 Difference]: Without dead ends: 2900 [2021-08-06 15:35:35,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:35:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-08-06 15:35:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 1844. [2021-08-06 15:35:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 2.921323928377645) internal successors, (5384), 1843 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5384 transitions. [2021-08-06 15:35:35,371 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5384 transitions. Word has length 33 [2021-08-06 15:35:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:35,371 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 5384 transitions. [2021-08-06 15:35:35,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5384 transitions. [2021-08-06 15:35:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:35,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:35,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:35,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 15:35:35,574 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,SelfDestructingSolverStorable39 [2021-08-06 15:35:35,574 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash -165530045, now seen corresponding path program 38 times [2021-08-06 15:35:35,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:35,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38932047] [2021-08-06 15:35:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:35,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:35,967 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 15:35:35,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:35,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38932047] [2021-08-06 15:35:35,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38932047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:35,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463214335] [2021-08-06 15:35:35,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:35,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:35,968 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 15:35:35,973 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 15:35:38,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:38,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:38,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:35:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:38,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:35:39,262 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 15:35:39,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463214335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:39,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:39,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:35:39,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489498433] [2021-08-06 15:35:39,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:35:39,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:35:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:35:39,264 INFO L87 Difference]: Start difference. First operand 1844 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:39,775 INFO L93 Difference]: Finished difference Result 2536 states and 7343 transitions. [2021-08-06 15:35:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:35:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:35:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:39,779 INFO L225 Difference]: With dead ends: 2536 [2021-08-06 15:35:39,779 INFO L226 Difference]: Without dead ends: 2517 [2021-08-06 15:35:39,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:35:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-08-06 15:35:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1856. [2021-08-06 15:35:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.922911051212938) internal successors, (5422), 1855 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5422 transitions. [2021-08-06 15:35:39,804 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5422 transitions. Word has length 33 [2021-08-06 15:35:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:39,804 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 5422 transitions. [2021-08-06 15:35:39,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5422 transitions. [2021-08-06 15:35:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:39,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:39,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:39,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 15:35:40,013 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,SelfDestructingSolverStorable40 [2021-08-06 15:35:40,014 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 710652419, now seen corresponding path program 39 times [2021-08-06 15:35:40,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:40,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128864521] [2021-08-06 15:35:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:40,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:40,316 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 15:35:40,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:40,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128864521] [2021-08-06 15:35:40,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128864521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:40,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766789407] [2021-08-06 15:35:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:40,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:40,317 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 15:35:40,318 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 15:35:42,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:35:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:35:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:43,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:35:43,701 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 15:35:43,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766789407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:43,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:43,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:35:43,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624853984] [2021-08-06 15:35:43,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:35:43,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:35:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:35:43,703 INFO L87 Difference]: Start difference. First operand 1856 states and 5422 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:44,445 INFO L93 Difference]: Finished difference Result 2313 states and 6653 transitions. [2021-08-06 15:35:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:35:44,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:35:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:44,449 INFO L225 Difference]: With dead ends: 2313 [2021-08-06 15:35:44,449 INFO L226 Difference]: Without dead ends: 2298 [2021-08-06 15:35:44,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 686.6ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:35:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-06 15:35:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1852. [2021-08-06 15:35:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.921663965424095) internal successors, (5408), 1851 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5408 transitions. [2021-08-06 15:35:44,471 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5408 transitions. Word has length 33 [2021-08-06 15:35:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:44,471 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 5408 transitions. [2021-08-06 15:35:44,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5408 transitions. [2021-08-06 15:35:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:44,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:44,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:44,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 15:35:44,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 15:35:44,675 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash -23814905, now seen corresponding path program 40 times [2021-08-06 15:35:44,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:44,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560625368] [2021-08-06 15:35:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:44,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:44,971 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 15:35:44,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:44,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560625368] [2021-08-06 15:35:44,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560625368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:44,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708775586] [2021-08-06 15:35:44,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:44,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:44,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:44,972 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 15:35:44,974 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 15:35:47,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:47,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:35:47,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:48,289 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 15:35:48,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708775586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:48,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:48,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:35:48,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895853681] [2021-08-06 15:35:48,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:35:48,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:35:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:35:48,292 INFO L87 Difference]: Start difference. First operand 1852 states and 5408 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:48,960 INFO L93 Difference]: Finished difference Result 3085 states and 8828 transitions. [2021-08-06 15:35:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:35:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:35:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:48,966 INFO L225 Difference]: With dead ends: 3085 [2021-08-06 15:35:48,966 INFO L226 Difference]: Without dead ends: 3070 [2021-08-06 15:35:48,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:35:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-08-06 15:35:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1867. [2021-08-06 15:35:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9217577706323685) internal successors, (5452), 1866 states have internal predecessors, (5452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5452 transitions. [2021-08-06 15:35:48,994 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5452 transitions. Word has length 33 [2021-08-06 15:35:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:48,995 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 5452 transitions. [2021-08-06 15:35:48,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5452 transitions. [2021-08-06 15:35:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:48,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:48,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:49,023 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 15:35:49,198 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,SelfDestructingSolverStorable42 [2021-08-06 15:35:49,198 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1306962365, now seen corresponding path program 41 times [2021-08-06 15:35:49,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:49,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178296086] [2021-08-06 15:35:49,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:49,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:49,473 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 15:35:49,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:49,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178296086] [2021-08-06 15:35:49,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178296086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:49,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715472503] [2021-08-06 15:35:49,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:49,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:49,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:49,475 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 15:35:49,475 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 15:35:52,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:52,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:35:52,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:52,876 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 15:35:52,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715472503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:52,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:52,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:35:52,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754677152] [2021-08-06 15:35:52,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:35:52,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:52,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:35:52,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:35:52,877 INFO L87 Difference]: Start difference. First operand 1867 states and 5452 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:53,517 INFO L93 Difference]: Finished difference Result 3084 states and 8813 transitions. [2021-08-06 15:35:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:35:53,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:35:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:53,522 INFO L225 Difference]: With dead ends: 3084 [2021-08-06 15:35:53,522 INFO L226 Difference]: Without dead ends: 3069 [2021-08-06 15:35:53,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:35:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-08-06 15:35:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1847. [2021-08-06 15:35:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.9209100758396533) internal successors, (5392), 1846 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 5392 transitions. [2021-08-06 15:35:53,555 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 5392 transitions. Word has length 33 [2021-08-06 15:35:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:53,555 INFO L470 AbstractCegarLoop]: Abstraction has 1847 states and 5392 transitions. [2021-08-06 15:35:53,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 5392 transitions. [2021-08-06 15:35:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:53,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:53,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:53,583 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 15:35:53,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:53,759 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1023381209, now seen corresponding path program 42 times [2021-08-06 15:35:53,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:53,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932938647] [2021-08-06 15:35:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:53,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:54,054 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 15:35:54,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:54,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932938647] [2021-08-06 15:35:54,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932938647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:54,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308961303] [2021-08-06 15:35:54,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:54,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:54,055 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 15:35:54,055 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 15:35:56,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:35:56,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:35:56,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:57,585 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 15:35:57,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308961303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:57,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:57,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:35:57,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048857530] [2021-08-06 15:35:57,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:35:57,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:57,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:35:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:35:57,587 INFO L87 Difference]: Start difference. First operand 1847 states and 5392 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 15:35:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:58,095 INFO L93 Difference]: Finished difference Result 2936 states and 8438 transitions. [2021-08-06 15:35:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:35:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 33 [2021-08-06 15:35:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:58,100 INFO L225 Difference]: With dead ends: 2936 [2021-08-06 15:35:58,100 INFO L226 Difference]: Without dead ends: 2921 [2021-08-06 15:35:58,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:35:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-08-06 15:35:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1931. [2021-08-06 15:35:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.9098445595854923) internal successors, (5616), 1930 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5616 transitions. [2021-08-06 15:35:58,124 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5616 transitions. Word has length 33 [2021-08-06 15:35:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:58,124 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 5616 transitions. [2021-08-06 15:35:58,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 15:35:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5616 transitions. [2021-08-06 15:35:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:35:58,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:58,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:58,151 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 15:35:58,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:58,327 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1059014257, now seen corresponding path program 43 times [2021-08-06 15:35:58,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:58,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827671669] [2021-08-06 15:35:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:58,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:58,617 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 15:35:58,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:58,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827671669] [2021-08-06 15:35:58,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827671669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:58,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999115691] [2021-08-06 15:35:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:58,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:58,618 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 15:35:58,619 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 15:36:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:36:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:02,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999115691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:02,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:02,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:36:02,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715084063] [2021-08-06 15:36:02,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:36:02,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:36:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:36:02,215 INFO L87 Difference]: Start difference. First operand 1931 states and 5616 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:02,999 INFO L93 Difference]: Finished difference Result 2621 states and 7460 transitions. [2021-08-06 15:36:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:36:02,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:03,003 INFO L225 Difference]: With dead ends: 2621 [2021-08-06 15:36:03,003 INFO L226 Difference]: Without dead ends: 2606 [2021-08-06 15:36:03,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 763.1ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:36:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-08-06 15:36:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1994. [2021-08-06 15:36:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.912694430506774) internal successors, (5805), 1993 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5805 transitions. [2021-08-06 15:36:03,029 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5805 transitions. Word has length 33 [2021-08-06 15:36:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:03,029 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5805 transitions. [2021-08-06 15:36:03,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:03,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5805 transitions. [2021-08-06 15:36:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:03,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:03,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:03,055 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 15:36:03,231 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,SelfDestructingSolverStorable45 [2021-08-06 15:36:03,232 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:03,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1287773101, now seen corresponding path program 44 times [2021-08-06 15:36:03,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:03,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017168657] [2021-08-06 15:36:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:03,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:03,539 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 15:36:03,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:03,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017168657] [2021-08-06 15:36:03,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017168657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:03,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987407170] [2021-08-06 15:36:03,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:03,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:03,541 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 15:36:03,622 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 15:36:06,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:06,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:36:07,283 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 15:36:07,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987407170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:07,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:07,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:36:07,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071458905] [2021-08-06 15:36:07,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:36:07,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:07,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:36:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:36:07,285 INFO L87 Difference]: Start difference. First operand 1994 states and 5805 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:36:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:07,799 INFO L93 Difference]: Finished difference Result 2645 states and 7641 transitions. [2021-08-06 15:36:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:36:07,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:36:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:07,803 INFO L225 Difference]: With dead ends: 2645 [2021-08-06 15:36:07,803 INFO L226 Difference]: Without dead ends: 2630 [2021-08-06 15:36:07,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:36:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-08-06 15:36:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1973. [2021-08-06 15:36:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.9046653144016226) internal successors, (5728), 1972 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5728 transitions. [2021-08-06 15:36:07,829 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5728 transitions. Word has length 33 [2021-08-06 15:36:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:07,829 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 5728 transitions. [2021-08-06 15:36:07,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:36:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5728 transitions. [2021-08-06 15:36:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:07,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:07,831 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:07,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 15:36:08,031 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,SelfDestructingSolverStorable46 [2021-08-06 15:36:08,032 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:08,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2060462395, now seen corresponding path program 45 times [2021-08-06 15:36:08,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:08,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341898651] [2021-08-06 15:36:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:08,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:08,325 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 15:36:08,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:08,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341898651] [2021-08-06 15:36:08,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341898651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:08,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746232397] [2021-08-06 15:36:08,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:08,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:08,326 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 15:36:08,327 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 15:36:11,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:36:11,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:11,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:36:12,019 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 15:36:12,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746232397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:12,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:12,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:36:12,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196744253] [2021-08-06 15:36:12,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:36:12,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:12,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:36:12,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:36:12,020 INFO L87 Difference]: Start difference. First operand 1973 states and 5728 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:36:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:12,542 INFO L93 Difference]: Finished difference Result 3095 states and 8859 transitions. [2021-08-06 15:36:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:36:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:36:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:12,547 INFO L225 Difference]: With dead ends: 3095 [2021-08-06 15:36:12,547 INFO L226 Difference]: Without dead ends: 3080 [2021-08-06 15:36:12,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:36:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-08-06 15:36:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 1994. [2021-08-06 15:36:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.902157551430005) internal successors, (5784), 1993 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5784 transitions. [2021-08-06 15:36:12,573 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5784 transitions. Word has length 33 [2021-08-06 15:36:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:12,573 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 5784 transitions. [2021-08-06 15:36:12,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:36:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5784 transitions. [2021-08-06 15:36:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:12,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:12,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:12,601 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 15:36:12,777 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,SelfDestructingSolverStorable47 [2021-08-06 15:36:12,777 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:12,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1906024877, now seen corresponding path program 46 times [2021-08-06 15:36:12,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:12,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227520762] [2021-08-06 15:36:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:12,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:13,064 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 15:36:13,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:13,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227520762] [2021-08-06 15:36:13,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227520762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:13,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937428017] [2021-08-06 15:36:13,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:36:13,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:13,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:13,065 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 15:36:13,068 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 15:36:16,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:36:16,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:36:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:16,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937428017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:16,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:16,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:36:16,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453751982] [2021-08-06 15:36:16,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:36:16,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:36:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:36:16,852 INFO L87 Difference]: Start difference. First operand 1994 states and 5784 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:17,371 INFO L93 Difference]: Finished difference Result 3024 states and 8672 transitions. [2021-08-06 15:36:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:36:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:17,376 INFO L225 Difference]: With dead ends: 3024 [2021-08-06 15:36:17,376 INFO L226 Difference]: Without dead ends: 3009 [2021-08-06 15:36:17,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:36:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-08-06 15:36:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1889. [2021-08-06 15:36:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-08-06 15:36:17,401 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-08-06 15:36:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:17,401 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-08-06 15:36:17,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-08-06 15:36:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:17,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:17,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:17,429 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 15:36:17,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:17,604 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -493544957, now seen corresponding path program 47 times [2021-08-06 15:36:17,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:17,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643537404] [2021-08-06 15:36:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:17,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:17,895 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 15:36:17,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:17,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643537404] [2021-08-06 15:36:17,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643537404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:17,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723711343] [2021-08-06 15:36:17,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:36:17,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:17,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:17,896 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 15:36:17,897 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 15:36:20,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:20,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:20,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:36:20,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:21,684 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 15:36:21,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723711343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:21,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:21,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:36:21,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597040099] [2021-08-06 15:36:21,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:36:21,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:21,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:36:21,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:36:21,685 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:22,343 INFO L93 Difference]: Finished difference Result 2401 states and 6909 transitions. [2021-08-06 15:36:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:36:22,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:22,346 INFO L225 Difference]: With dead ends: 2401 [2021-08-06 15:36:22,347 INFO L226 Difference]: Without dead ends: 2382 [2021-08-06 15:36:22,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 642.0ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:36:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-08-06 15:36:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1915. [2021-08-06 15:36:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9221525600835947) internal successors, (5593), 1914 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5593 transitions. [2021-08-06 15:36:22,368 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5593 transitions. Word has length 33 [2021-08-06 15:36:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:22,368 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 5593 transitions. [2021-08-06 15:36:22,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5593 transitions. [2021-08-06 15:36:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:22,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:22,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:22,395 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 15:36:22,571 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,SelfDestructingSolverStorable49 [2021-08-06 15:36:22,571 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash 382637507, now seen corresponding path program 48 times [2021-08-06 15:36:22,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:22,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292305644] [2021-08-06 15:36:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:22,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:22,826 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 15:36:22,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:22,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292305644] [2021-08-06 15:36:22,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292305644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:22,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207790772] [2021-08-06 15:36:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:22,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:22,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:22,828 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 15:36:22,830 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 15:36:25,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:36:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:26,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:36:26,884 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 15:36:26,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207790772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:26,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:26,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:36:26,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370281494] [2021-08-06 15:36:26,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:36:26,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:36:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:36:26,885 INFO L87 Difference]: Start difference. First operand 1915 states and 5593 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:27,814 INFO L93 Difference]: Finished difference Result 2401 states and 6903 transitions. [2021-08-06 15:36:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:36:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:27,818 INFO L225 Difference]: With dead ends: 2401 [2021-08-06 15:36:27,818 INFO L226 Difference]: Without dead ends: 2386 [2021-08-06 15:36:27,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 834.6ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:36:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-08-06 15:36:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1911. [2021-08-06 15:36:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-08-06 15:36:27,840 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-08-06 15:36:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:27,841 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-08-06 15:36:27,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-08-06 15:36:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:27,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:27,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:27,868 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 15:36:28,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:28,044 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:28,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1720498621, now seen corresponding path program 49 times [2021-08-06 15:36:28,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:28,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212590714] [2021-08-06 15:36:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:28,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:28,324 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 15:36:28,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:28,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212590714] [2021-08-06 15:36:28,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212590714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:28,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698866370] [2021-08-06 15:36:28,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:36:28,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:28,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:28,326 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 15:36:28,326 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 15:36:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:36:31,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:32,176 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 15:36:32,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698866370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:32,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:32,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:36:32,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273937884] [2021-08-06 15:36:32,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:36:32,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:36:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:36:32,177 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:32,608 INFO L93 Difference]: Finished difference Result 2538 states and 7369 transitions. [2021-08-06 15:36:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:36:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:32,613 INFO L225 Difference]: With dead ends: 2538 [2021-08-06 15:36:32,613 INFO L226 Difference]: Without dead ends: 2519 [2021-08-06 15:36:32,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:36:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-08-06 15:36:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1933. [2021-08-06 15:36:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9151138716356106) internal successors, (5632), 1932 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5632 transitions. [2021-08-06 15:36:32,636 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5632 transitions. Word has length 33 [2021-08-06 15:36:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:32,637 INFO L470 AbstractCegarLoop]: Abstraction has 1933 states and 5632 transitions. [2021-08-06 15:36:32,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5632 transitions. [2021-08-06 15:36:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:32,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:32,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:32,665 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 15:36:32,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 15:36:32,839 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:32,840 INFO L82 PathProgramCache]: Analyzing trace with hash 741551271, now seen corresponding path program 50 times [2021-08-06 15:36:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:32,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564129120] [2021-08-06 15:36:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:32,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:33,109 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 15:36:33,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:33,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564129120] [2021-08-06 15:36:33,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564129120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:33,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587366671] [2021-08-06 15:36:33,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:33,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:33,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:33,113 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 15:36:33,142 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 15:36:36,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:36,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:36,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:36,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:36:37,219 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 15:36:37,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587366671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:37,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:37,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:36:37,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722484343] [2021-08-06 15:36:37,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:36:37,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:36:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:36:37,220 INFO L87 Difference]: Start difference. First operand 1933 states and 5632 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:37,720 INFO L93 Difference]: Finished difference Result 2564 states and 7420 transitions. [2021-08-06 15:36:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:36:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:37,724 INFO L225 Difference]: With dead ends: 2564 [2021-08-06 15:36:37,724 INFO L226 Difference]: Without dead ends: 2549 [2021-08-06 15:36:37,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:36:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-08-06 15:36:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1911. [2021-08-06 15:36:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-08-06 15:36:37,747 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-08-06 15:36:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:37,747 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-08-06 15:36:37,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-08-06 15:36:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:37,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:37,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:37,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:37,949 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,SelfDestructingSolverStorable52 [2021-08-06 15:36:37,950 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash -114396377, now seen corresponding path program 51 times [2021-08-06 15:36:37,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:37,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596928883] [2021-08-06 15:36:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:37,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:38,244 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 15:36:38,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:38,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596928883] [2021-08-06 15:36:38,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596928883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:38,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714459360] [2021-08-06 15:36:38,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:38,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:38,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:38,245 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 15:36:38,248 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 15:36:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:36:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:41,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:36:42,439 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 15:36:42,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714459360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:42,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:42,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:36:42,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788448822] [2021-08-06 15:36:42,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:36:42,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:36:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:36:42,440 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:43,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:43,259 INFO L93 Difference]: Finished difference Result 2504 states and 7146 transitions. [2021-08-06 15:36:43,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:36:43,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:43,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:43,263 INFO L225 Difference]: With dead ends: 2504 [2021-08-06 15:36:43,263 INFO L226 Difference]: Without dead ends: 2489 [2021-08-06 15:36:43,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 825.7ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:36:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-08-06 15:36:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1932. [2021-08-06 15:36:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9290523045054377) internal successors, (5656), 1931 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5656 transitions. [2021-08-06 15:36:43,284 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5656 transitions. Word has length 33 [2021-08-06 15:36:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:43,284 INFO L470 AbstractCegarLoop]: Abstraction has 1932 states and 5656 transitions. [2021-08-06 15:36:43,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5656 transitions. [2021-08-06 15:36:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:43,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:43,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:43,314 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 15:36:43,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:43,488 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:43,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1780794963, now seen corresponding path program 52 times [2021-08-06 15:36:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:43,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748431790] [2021-08-06 15:36:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:43,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:43,766 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 15:36:43,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:43,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748431790] [2021-08-06 15:36:43,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748431790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:43,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542035341] [2021-08-06 15:36:43,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:36:43,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:43,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:43,767 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 15:36:43,791 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 15:36:47,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:36:47,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:36:47,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:47,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542035341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:47,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:47,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:36:47,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823312035] [2021-08-06 15:36:47,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:36:47,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:36:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:36:47,874 INFO L87 Difference]: Start difference. First operand 1932 states and 5656 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:48,487 INFO L93 Difference]: Finished difference Result 2475 states and 7081 transitions. [2021-08-06 15:36:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:36:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:48,491 INFO L225 Difference]: With dead ends: 2475 [2021-08-06 15:36:48,491 INFO L226 Difference]: Without dead ends: 2460 [2021-08-06 15:36:48,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 619.4ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:36:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-08-06 15:36:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1900. [2021-08-06 15:36:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-08-06 15:36:48,513 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-08-06 15:36:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:48,513 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-08-06 15:36:48,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-08-06 15:36:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:48,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:48,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:48,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 15:36:48,716 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,SelfDestructingSolverStorable54 [2021-08-06 15:36:48,716 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1628011223, now seen corresponding path program 53 times [2021-08-06 15:36:48,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:48,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106059943] [2021-08-06 15:36:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:48,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:48,973 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 15:36:48,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:48,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106059943] [2021-08-06 15:36:48,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106059943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:48,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359583348] [2021-08-06 15:36:48,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:36:48,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:48,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:48,975 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 15:36:48,975 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 15:36:52,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:52,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:36:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:53,096 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 15:36:53,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359583348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:53,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:53,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:36:53,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738279090] [2021-08-06 15:36:53,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:36:53,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:36:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:36:53,097 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:53,706 INFO L93 Difference]: Finished difference Result 2840 states and 8188 transitions. [2021-08-06 15:36:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:36:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:53,710 INFO L225 Difference]: With dead ends: 2840 [2021-08-06 15:36:53,711 INFO L226 Difference]: Without dead ends: 2821 [2021-08-06 15:36:53,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 532.5ms TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:36:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-08-06 15:36:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 1908. [2021-08-06 15:36:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.916622968012585) internal successors, (5562), 1907 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5562 transitions. [2021-08-06 15:36:53,735 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5562 transitions. Word has length 33 [2021-08-06 15:36:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:53,735 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 5562 transitions. [2021-08-06 15:36:53,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5562 transitions. [2021-08-06 15:36:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:53,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:53,738 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:53,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 15:36:53,938 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,SelfDestructingSolverStorable55 [2021-08-06 15:36:53,939 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1790773609, now seen corresponding path program 54 times [2021-08-06 15:36:53,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:53,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87092343] [2021-08-06 15:36:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:53,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:54,208 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 15:36:54,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:54,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87092343] [2021-08-06 15:36:54,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87092343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:54,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743218367] [2021-08-06 15:36:54,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:54,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:54,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:54,210 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 15:36:54,210 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 15:36:57,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:36:57,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:58,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:36:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:58,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743218367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:58,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:58,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:36:58,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398096781] [2021-08-06 15:36:58,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:36:58,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:36:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:36:58,575 INFO L87 Difference]: Start difference. First operand 1908 states and 5562 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:59,661 INFO L93 Difference]: Finished difference Result 2601 states and 7460 transitions. [2021-08-06 15:36:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:36:59,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:36:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:59,665 INFO L225 Difference]: With dead ends: 2601 [2021-08-06 15:36:59,665 INFO L226 Difference]: Without dead ends: 2571 [2021-08-06 15:36:59,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1018.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:36:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-08-06 15:36:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1900. [2021-08-06 15:36:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-08-06 15:36:59,689 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-08-06 15:36:59,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:59,690 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-08-06 15:36:59,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-08-06 15:36:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:36:59,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:59,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:59,719 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 15:36:59,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:59,893 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:59,893 INFO L82 PathProgramCache]: Analyzing trace with hash -516801493, now seen corresponding path program 55 times [2021-08-06 15:36:59,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:59,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119517348] [2021-08-06 15:36:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:59,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:00,158 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 15:37:00,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:00,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119517348] [2021-08-06 15:37:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119517348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:00,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539236346] [2021-08-06 15:37:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:37:00,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:00,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:00,159 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 15:37:00,160 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 15:37:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:37:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:04,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539236346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:04,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:04,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:37:04,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996693202] [2021-08-06 15:37:04,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:37:04,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:37:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:37:04,444 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:05,423 INFO L93 Difference]: Finished difference Result 2680 states and 7637 transitions. [2021-08-06 15:37:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:37:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:05,427 INFO L225 Difference]: With dead ends: 2680 [2021-08-06 15:37:05,428 INFO L226 Difference]: Without dead ends: 2665 [2021-08-06 15:37:05,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:37:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-08-06 15:37:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1942. [2021-08-06 15:37:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.9206594538897477) internal successors, (5669), 1941 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 5669 transitions. [2021-08-06 15:37:05,455 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 5669 transitions. Word has length 33 [2021-08-06 15:37:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:05,455 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 5669 transitions. [2021-08-06 15:37:05,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 5669 transitions. [2021-08-06 15:37:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:05,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:05,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:05,491 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 15:37:05,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:05,681 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2111767217, now seen corresponding path program 56 times [2021-08-06 15:37:05,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:05,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313606582] [2021-08-06 15:37:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:05,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:05,998 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 15:37:05,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:05,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313606582] [2021-08-06 15:37:05,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313606582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:05,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148457539] [2021-08-06 15:37:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:37:05,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:06,000 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 15:37:06,000 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 15:37:09,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:09,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:09,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:37:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:09,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:37:10,406 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 15:37:10,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148457539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:10,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:10,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:37:10,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765067616] [2021-08-06 15:37:10,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:10,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:10,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:10,407 INFO L87 Difference]: Start difference. First operand 1942 states and 5669 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:11,068 INFO L93 Difference]: Finished difference Result 2932 states and 8415 transitions. [2021-08-06 15:37:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:37:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:11,072 INFO L225 Difference]: With dead ends: 2932 [2021-08-06 15:37:11,072 INFO L226 Difference]: Without dead ends: 2917 [2021-08-06 15:37:11,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 643.8ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-08-06 15:37:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1889. [2021-08-06 15:37:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-08-06 15:37:11,098 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-08-06 15:37:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:11,098 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-08-06 15:37:11,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-08-06 15:37:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:11,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:11,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:11,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 15:37:11,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:11,302 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:11,302 INFO L82 PathProgramCache]: Analyzing trace with hash 689886501, now seen corresponding path program 57 times [2021-08-06 15:37:11,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:11,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618620499] [2021-08-06 15:37:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:11,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:11,550 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 15:37:11,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:11,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618620499] [2021-08-06 15:37:11,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618620499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:11,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087645706] [2021-08-06 15:37:11,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:37:11,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:11,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:11,551 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 15:37:11,552 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 15:37:15,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:37:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:37:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:15,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:37:16,083 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 15:37:16,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087645706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:16,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:16,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:37:16,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603473849] [2021-08-06 15:37:16,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:16,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:16,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:16,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:16,084 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:16,786 INFO L93 Difference]: Finished difference Result 2942 states and 8439 transitions. [2021-08-06 15:37:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:37:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:16,791 INFO L225 Difference]: With dead ends: 2942 [2021-08-06 15:37:16,791 INFO L226 Difference]: Without dead ends: 2923 [2021-08-06 15:37:16,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:37:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-08-06 15:37:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1893. [2021-08-06 15:37:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.916490486257928) internal successors, (5518), 1892 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5518 transitions. [2021-08-06 15:37:16,817 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5518 transitions. Word has length 33 [2021-08-06 15:37:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 5518 transitions. [2021-08-06 15:37:16,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5518 transitions. [2021-08-06 15:37:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:16,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:16,819 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:16,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 15:37:17,019 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,SelfDestructingSolverStorable59 [2021-08-06 15:37:17,020 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1566068965, now seen corresponding path program 58 times [2021-08-06 15:37:17,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:17,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463772221] [2021-08-06 15:37:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:17,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:17,324 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 15:37:17,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:17,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463772221] [2021-08-06 15:37:17,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463772221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:17,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554487159] [2021-08-06 15:37:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:17,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:17,327 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 15:37:17,327 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 15:37:21,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:21,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:21,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:37:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:21,830 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 15:37:21,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554487159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:21,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:21,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:37:21,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963164080] [2021-08-06 15:37:21,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:37:21,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:37:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:37:21,831 INFO L87 Difference]: Start difference. First operand 1893 states and 5518 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:22,715 INFO L93 Difference]: Finished difference Result 2516 states and 7218 transitions. [2021-08-06 15:37:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:37:22,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:22,719 INFO L225 Difference]: With dead ends: 2516 [2021-08-06 15:37:22,719 INFO L226 Difference]: Without dead ends: 2501 [2021-08-06 15:37:22,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 742.4ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:37:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-08-06 15:37:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 1881. [2021-08-06 15:37:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 2.9148936170212765) internal successors, (5480), 1880 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 5480 transitions. [2021-08-06 15:37:22,741 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 5480 transitions. Word has length 33 [2021-08-06 15:37:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:22,742 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 5480 transitions. [2021-08-06 15:37:22,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 5480 transitions. [2021-08-06 15:37:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:22,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:22,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:22,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 15:37:22,944 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,SelfDestructingSolverStorable60 [2021-08-06 15:37:22,944 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1694496615, now seen corresponding path program 59 times [2021-08-06 15:37:22,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:22,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613440434] [2021-08-06 15:37:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:22,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:23,206 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 15:37:23,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:23,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613440434] [2021-08-06 15:37:23,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613440434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:23,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712716527] [2021-08-06 15:37:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:37:23,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:23,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:23,214 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 15:37:23,214 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 15:37:27,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:27,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:37:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:27,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712716527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:27,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:27,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 15:37:27,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383707298] [2021-08-06 15:37:27,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:37:27,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:37:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:37:27,759 INFO L87 Difference]: Start difference. First operand 1881 states and 5480 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:28,566 INFO L93 Difference]: Finished difference Result 2510 states and 7169 transitions. [2021-08-06 15:37:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:37:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:28,570 INFO L225 Difference]: With dead ends: 2510 [2021-08-06 15:37:28,570 INFO L226 Difference]: Without dead ends: 2495 [2021-08-06 15:37:28,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 764.2ms TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:37:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-08-06 15:37:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1902. [2021-08-06 15:37:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.923198316675434) internal successors, (5557), 1901 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5557 transitions. [2021-08-06 15:37:28,597 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5557 transitions. Word has length 33 [2021-08-06 15:37:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:28,597 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 5557 transitions. [2021-08-06 15:37:28,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5557 transitions. [2021-08-06 15:37:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:28,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:28,600 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:28,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:28,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 15:37:28,825 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash 28098029, now seen corresponding path program 60 times [2021-08-06 15:37:28,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:28,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46377444] [2021-08-06 15:37:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:28,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:29,120 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 15:37:29,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:29,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46377444] [2021-08-06 15:37:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46377444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:29,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290930291] [2021-08-06 15:37:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:37:29,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:29,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:29,121 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 15:37:29,122 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 15:37:33,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:37:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:37:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:33,795 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 15:37:33,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290930291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:33,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:33,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:37:33,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556153253] [2021-08-06 15:37:33,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:33,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:33,797 INFO L87 Difference]: Start difference. First operand 1902 states and 5557 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:34,532 INFO L93 Difference]: Finished difference Result 2848 states and 8175 transitions. [2021-08-06 15:37:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:37:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:34,537 INFO L225 Difference]: With dead ends: 2848 [2021-08-06 15:37:34,537 INFO L226 Difference]: Without dead ends: 2833 [2021-08-06 15:37:34,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:37:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-08-06 15:37:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1784. [2021-08-06 15:37:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.9209197980931014) internal successors, (5208), 1783 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5208 transitions. [2021-08-06 15:37:34,565 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5208 transitions. Word has length 33 [2021-08-06 15:37:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:34,565 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 5208 transitions. [2021-08-06 15:37:34,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5208 transitions. [2021-08-06 15:37:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:34,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:34,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:34,598 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 15:37:34,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:34,776 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1005542603, now seen corresponding path program 61 times [2021-08-06 15:37:34,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:34,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704306834] [2021-08-06 15:37:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:34,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:34,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:34,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704306834] [2021-08-06 15:37:34,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704306834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:37:34,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:37:34,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:37:34,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066251100] [2021-08-06 15:37:34,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:37:34,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:37:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:37:34,830 INFO L87 Difference]: Start difference. First operand 1784 states and 5208 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 15:37:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:34,836 INFO L93 Difference]: Finished difference Result 1474 states and 4216 transitions. [2021-08-06 15:37:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:37:34,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 33 [2021-08-06 15:37:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:34,838 INFO L225 Difference]: With dead ends: 1474 [2021-08-06 15:37:34,839 INFO L226 Difference]: Without dead ends: 1474 [2021-08-06 15:37:34,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:37:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-08-06 15:37:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2021-08-06 15:37:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.8621860149355056) internal successors, (4216), 1473 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4216 transitions. [2021-08-06 15:37:34,854 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4216 transitions. Word has length 33 [2021-08-06 15:37:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:34,854 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 4216 transitions. [2021-08-06 15:37:34,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 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 15:37:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4216 transitions. [2021-08-06 15:37:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:34,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:34,856 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:34,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-06 15:37:34,857 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1645279201, now seen corresponding path program 62 times [2021-08-06 15:37:34,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:34,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221556451] [2021-08-06 15:37:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:34,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:35,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:35,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221556451] [2021-08-06 15:37:35,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221556451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:35,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627526433] [2021-08-06 15:37:35,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:37:35,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:35,138 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 15:37:35,139 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 15:37:39,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:37:39,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:39,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:37:39,830 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 15:37:39,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627526433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:39,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:39,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:37:39,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106074144] [2021-08-06 15:37:39,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:37:39,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:37:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:37:39,831 INFO L87 Difference]: Start difference. First operand 1474 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:40,314 INFO L93 Difference]: Finished difference Result 2389 states and 6716 transitions. [2021-08-06 15:37:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:37:40,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:40,318 INFO L225 Difference]: With dead ends: 2389 [2021-08-06 15:37:40,318 INFO L226 Difference]: Without dead ends: 2374 [2021-08-06 15:37:40,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:37:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-08-06 15:37:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 1513. [2021-08-06 15:37:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.8624338624338623) internal successors, (4328), 1512 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4328 transitions. [2021-08-06 15:37:40,339 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4328 transitions. Word has length 33 [2021-08-06 15:37:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:40,339 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 4328 transitions. [2021-08-06 15:37:40,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4328 transitions. [2021-08-06 15:37:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:40,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:40,341 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:40,369 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 15:37:40,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:40,542 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1880955999, now seen corresponding path program 63 times [2021-08-06 15:37:40,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:40,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346126084] [2021-08-06 15:37:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:40,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:40,844 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 15:37:40,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:40,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346126084] [2021-08-06 15:37:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346126084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:40,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436430205] [2021-08-06 15:37:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:37:40,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:40,847 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 15:37:40,848 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 15:37:44,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:37:44,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:37:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:37:45,595 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 15:37:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436430205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:45,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:37:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242768490] [2021-08-06 15:37:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:37:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:37:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:37:45,596 INFO L87 Difference]: Start difference. First operand 1513 states and 4328 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:46,039 INFO L93 Difference]: Finished difference Result 2114 states and 5956 transitions. [2021-08-06 15:37:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:37:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:46,043 INFO L225 Difference]: With dead ends: 2114 [2021-08-06 15:37:46,043 INFO L226 Difference]: Without dead ends: 2095 [2021-08-06 15:37:46,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:37:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-08-06 15:37:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1525. [2021-08-06 15:37:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.8648293963254594) internal successors, (4366), 1524 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 4366 transitions. [2021-08-06 15:37:46,072 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 4366 transitions. Word has length 33 [2021-08-06 15:37:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:46,072 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 4366 transitions. [2021-08-06 15:37:46,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 4366 transitions. [2021-08-06 15:37:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:46,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:46,073 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:46,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 15:37:46,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 15:37:46,274 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:46,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1537828833, now seen corresponding path program 64 times [2021-08-06 15:37:46,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:46,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674687256] [2021-08-06 15:37:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:46,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:46,538 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 15:37:46,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:46,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674687256] [2021-08-06 15:37:46,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674687256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:46,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701202690] [2021-08-06 15:37:46,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:46,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:46,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:46,540 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 15:37:46,541 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 15:37:50,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:37:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:51,351 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 15:37:51,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701202690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:51,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:51,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:37:51,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72516733] [2021-08-06 15:37:51,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:51,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:51,352 INFO L87 Difference]: Start difference. First operand 1525 states and 4366 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:52,161 INFO L93 Difference]: Finished difference Result 2060 states and 5749 transitions. [2021-08-06 15:37:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:37:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:52,164 INFO L225 Difference]: With dead ends: 2060 [2021-08-06 15:37:52,164 INFO L226 Difference]: Without dead ends: 2045 [2021-08-06 15:37:52,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:37:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-08-06 15:37:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1521. [2021-08-06 15:37:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.863157894736842) internal successors, (4352), 1520 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4352 transitions. [2021-08-06 15:37:52,181 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4352 transitions. Word has length 33 [2021-08-06 15:37:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:52,181 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4352 transitions. [2021-08-06 15:37:52,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4352 transitions. [2021-08-06 15:37:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:52,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:52,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:52,210 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 15:37:52,383 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,SelfDestructingSolverStorable66 [2021-08-06 15:37:52,383 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:52,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:52,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2022671139, now seen corresponding path program 65 times [2021-08-06 15:37:52,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:52,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101724931] [2021-08-06 15:37:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:52,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:52,724 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 15:37:52,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:52,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101724931] [2021-08-06 15:37:52,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101724931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:52,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679526714] [2021-08-06 15:37:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:37:52,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:52,725 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 15:37:52,726 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 15:37:56,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:37:56,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:57,546 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 15:37:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679526714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:57,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:37:57,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451324578] [2021-08-06 15:37:57,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:37:57,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:37:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:37:57,547 INFO L87 Difference]: Start difference. First operand 1521 states and 4352 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:58,213 INFO L93 Difference]: Finished difference Result 2637 states and 7354 transitions. [2021-08-06 15:37:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:37:58,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:37:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:58,217 INFO L225 Difference]: With dead ends: 2637 [2021-08-06 15:37:58,217 INFO L226 Difference]: Without dead ends: 2622 [2021-08-06 15:37:58,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:37:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-08-06 15:37:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1527. [2021-08-06 15:37:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-08-06 15:37:58,237 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-08-06 15:37:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:58,237 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-08-06 15:37:58,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-08-06 15:37:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:37:58,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:58,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:58,267 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 15:37:58,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:58,440 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash 739523679, now seen corresponding path program 66 times [2021-08-06 15:37:58,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:58,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205415316] [2021-08-06 15:37:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:58,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:58,792 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 15:37:58,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:58,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205415316] [2021-08-06 15:37:58,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205415316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:58,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343640806] [2021-08-06 15:37:58,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:37:58,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:58,836 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 15:37:58,837 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 15:38:03,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:38:03,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:38:03,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:03,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:38:03,874 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 15:38:03,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343640806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:03,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:03,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:38:03,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120257928] [2021-08-06 15:38:03,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:38:03,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:03,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:38:03,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:38:03,875 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:04,491 INFO L93 Difference]: Finished difference Result 2611 states and 7273 transitions. [2021-08-06 15:38:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:38:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:04,495 INFO L225 Difference]: With dead ends: 2611 [2021-08-06 15:38:04,495 INFO L226 Difference]: Without dead ends: 2596 [2021-08-06 15:38:04,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:38:04,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-06 15:38:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1507. [2021-08-06 15:38:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.861885790172643) internal successors, (4310), 1506 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4310 transitions. [2021-08-06 15:38:04,515 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4310 transitions. Word has length 33 [2021-08-06 15:38:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:04,515 INFO L470 AbstractCegarLoop]: Abstraction has 1507 states and 4310 transitions. [2021-08-06 15:38:04,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4310 transitions. [2021-08-06 15:38:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:04,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:04,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:04,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:04,718 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,SelfDestructingSolverStorable68 [2021-08-06 15:38:04,718 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1023104835, now seen corresponding path program 67 times [2021-08-06 15:38:04,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:04,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522880934] [2021-08-06 15:38:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:04,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:04,987 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 15:38:04,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:04,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522880934] [2021-08-06 15:38:04,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522880934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:04,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612781564] [2021-08-06 15:38:04,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:38:04,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:04,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:04,997 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 15:38:04,998 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 15:38:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:38:09,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:09,971 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 15:38:09,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612781564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:09,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:09,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:38:09,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93632705] [2021-08-06 15:38:09,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:09,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:09,972 INFO L87 Difference]: Start difference. First operand 1507 states and 4310 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:10,406 INFO L93 Difference]: Finished difference Result 2483 states and 6920 transitions. [2021-08-06 15:38:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:38:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:10,410 INFO L225 Difference]: With dead ends: 2483 [2021-08-06 15:38:10,410 INFO L226 Difference]: Without dead ends: 2468 [2021-08-06 15:38:10,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:38:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-08-06 15:38:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1576. [2021-08-06 15:38:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.843809523809524) internal successors, (4479), 1575 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4479 transitions. [2021-08-06 15:38:10,430 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4479 transitions. Word has length 33 [2021-08-06 15:38:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:10,430 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 4479 transitions. [2021-08-06 15:38:10,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4479 transitions. [2021-08-06 15:38:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:10,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:10,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:10,461 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 15:38:10,633 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,SelfDestructingSolverStorable69 [2021-08-06 15:38:10,633 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 987471787, now seen corresponding path program 68 times [2021-08-06 15:38:10,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:10,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669923729] [2021-08-06 15:38:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:10,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:10,920 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 15:38:10,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:10,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669923729] [2021-08-06 15:38:10,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669923729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:10,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030665056] [2021-08-06 15:38:10,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:38:10,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:10,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:10,922 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 15:38:10,922 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 15:38:15,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:38:15,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:15,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:38:15,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:15,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:38:16,095 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 15:38:16,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030665056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:16,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:16,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:38:16,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601161530] [2021-08-06 15:38:16,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:38:16,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:16,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:38:16,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:38:16,096 INFO L87 Difference]: Start difference. First operand 1576 states and 4479 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:38:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:16,784 INFO L93 Difference]: Finished difference Result 1881 states and 5259 transitions. [2021-08-06 15:38:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:38:16,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 33 [2021-08-06 15:38:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:16,787 INFO L225 Difference]: With dead ends: 1881 [2021-08-06 15:38:16,787 INFO L226 Difference]: Without dead ends: 1866 [2021-08-06 15:38:16,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:38:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-08-06 15:38:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1594. [2021-08-06 15:38:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.8455743879472695) internal successors, (4533), 1593 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4533 transitions. [2021-08-06 15:38:16,806 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4533 transitions. Word has length 33 [2021-08-06 15:38:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:16,806 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 4533 transitions. [2021-08-06 15:38:16,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:38:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4533 transitions. [2021-08-06 15:38:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:16,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:16,808 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:16,837 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 15:38:17,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:17,008 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash 758712943, now seen corresponding path program 69 times [2021-08-06 15:38:17,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:17,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751789835] [2021-08-06 15:38:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:17,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:17,291 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 15:38:17,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:17,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751789835] [2021-08-06 15:38:17,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751789835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:17,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689721642] [2021-08-06 15:38:17,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:38:17,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:17,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:17,293 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 15:38:17,295 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 15:38:21,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:38:21,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:21,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:38:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:22,446 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 15:38:22,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689721642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:22,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:22,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:38:22,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727627108] [2021-08-06 15:38:22,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:38:22,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:38:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:38:22,447 INFO L87 Difference]: Start difference. First operand 1594 states and 4533 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:22,888 INFO L93 Difference]: Finished difference Result 2092 states and 5887 transitions. [2021-08-06 15:38:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:38:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:22,891 INFO L225 Difference]: With dead ends: 2092 [2021-08-06 15:38:22,891 INFO L226 Difference]: Without dead ends: 2077 [2021-08-06 15:38:22,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:38:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-08-06 15:38:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1588. [2021-08-06 15:38:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.8424700693131695) internal successors, (4511), 1587 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4511 transitions. [2021-08-06 15:38:22,911 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4511 transitions. Word has length 33 [2021-08-06 15:38:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:22,911 INFO L470 AbstractCegarLoop]: Abstraction has 1588 states and 4511 transitions. [2021-08-06 15:38:22,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4511 transitions. [2021-08-06 15:38:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:22,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:22,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:22,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:23,113 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,SelfDestructingSolverStorable71 [2021-08-06 15:38:23,114 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash -188018857, now seen corresponding path program 70 times [2021-08-06 15:38:23,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:23,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977730186] [2021-08-06 15:38:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:23,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:23,473 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 15:38:23,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:23,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977730186] [2021-08-06 15:38:23,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977730186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:23,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074913003] [2021-08-06 15:38:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:38:23,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:23,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:23,475 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 15:38:23,475 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 15:38:27,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:38:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:38:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:28,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074913003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:28,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:28,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:38:28,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091969134] [2021-08-06 15:38:28,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:28,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:28,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:28,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:28,655 INFO L87 Difference]: Start difference. First operand 1588 states and 4511 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:29,139 INFO L93 Difference]: Finished difference Result 2502 states and 6967 transitions. [2021-08-06 15:38:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:38:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:29,144 INFO L225 Difference]: With dead ends: 2502 [2021-08-06 15:38:29,144 INFO L226 Difference]: Without dead ends: 2487 [2021-08-06 15:38:29,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:38:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-08-06 15:38:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1594. [2021-08-06 15:38:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.84180790960452) internal successors, (4527), 1593 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4527 transitions. [2021-08-06 15:38:29,163 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4527 transitions. Word has length 33 [2021-08-06 15:38:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:29,163 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 4527 transitions. [2021-08-06 15:38:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4527 transitions. [2021-08-06 15:38:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:29,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:29,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:29,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:29,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:29,369 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash -342456375, now seen corresponding path program 71 times [2021-08-06 15:38:29,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:29,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384448749] [2021-08-06 15:38:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:29,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:29,684 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 15:38:29,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:29,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384448749] [2021-08-06 15:38:29,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384448749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:29,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038532402] [2021-08-06 15:38:29,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:38:29,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:29,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:29,689 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 15:38:29,717 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 15:38:34,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:38:34,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:38:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:35,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038532402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:35,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-06 15:38:35,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835188593] [2021-08-06 15:38:35,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:35,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:35,037 INFO L87 Difference]: Start difference. First operand 1594 states and 4527 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:35,581 INFO L93 Difference]: Finished difference Result 2501 states and 6968 transitions. [2021-08-06 15:38:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:38:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:35,586 INFO L225 Difference]: With dead ends: 2501 [2021-08-06 15:38:35,586 INFO L226 Difference]: Without dead ends: 2486 [2021-08-06 15:38:35,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:38:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-08-06 15:38:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1519. [2021-08-06 15:38:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-08-06 15:38:35,620 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-08-06 15:38:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:35,620 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-08-06 15:38:35,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-08-06 15:38:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:35,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:35,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:35,651 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 15:38:35,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:35,822 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1552941087, now seen corresponding path program 72 times [2021-08-06 15:38:35,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:35,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612871666] [2021-08-06 15:38:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:35,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:36,087 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 15:38:36,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:36,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612871666] [2021-08-06 15:38:36,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612871666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:36,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225489072] [2021-08-06 15:38:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:38:36,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:36,089 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 15:38:36,089 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 15:38:40,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:38:40,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:40,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:38:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:41,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:38:41,537 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 15:38:41,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225489072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:41,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:41,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:38:41,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630681903] [2021-08-06 15:38:41,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:41,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:41,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:41,538 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:42,234 INFO L93 Difference]: Finished difference Result 1875 states and 5272 transitions. [2021-08-06 15:38:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:38:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:42,237 INFO L225 Difference]: With dead ends: 1875 [2021-08-06 15:38:42,237 INFO L226 Difference]: Without dead ends: 1856 [2021-08-06 15:38:42,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 687.5ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:38:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-08-06 15:38:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1527. [2021-08-06 15:38:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-08-06 15:38:42,252 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-08-06 15:38:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:42,253 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-08-06 15:38:42,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-08-06 15:38:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:42,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:42,254 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:42,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 15:38:42,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:42,455 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:42,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1865843745, now seen corresponding path program 73 times [2021-08-06 15:38:42,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:42,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255182470] [2021-08-06 15:38:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:42,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:42,709 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 15:38:42,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:42,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255182470] [2021-08-06 15:38:42,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255182470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:42,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961914094] [2021-08-06 15:38:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:38:42,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:42,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:42,710 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 15:38:42,711 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 15:38:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:47,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:38:47,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:48,157 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 15:38:48,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961914094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:48,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:48,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:38:48,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51280809] [2021-08-06 15:38:48,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:38:48,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:48,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:38:48,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:38:48,158 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:48,932 INFO L93 Difference]: Finished difference Result 1875 states and 5266 transitions. [2021-08-06 15:38:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:38:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:48,935 INFO L225 Difference]: With dead ends: 1875 [2021-08-06 15:38:48,935 INFO L226 Difference]: Without dead ends: 1860 [2021-08-06 15:38:48,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 623.0ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:38:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-08-06 15:38:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1523. [2021-08-06 15:38:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-08-06 15:38:48,951 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-08-06 15:38:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:48,951 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-08-06 15:38:48,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-08-06 15:38:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:48,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:48,953 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:48,982 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 15:38:49,153 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,SelfDestructingSolverStorable75 [2021-08-06 15:38:49,154 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:49,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:49,154 INFO L82 PathProgramCache]: Analyzing trace with hash 325987423, now seen corresponding path program 74 times [2021-08-06 15:38:49,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:49,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680143701] [2021-08-06 15:38:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:49,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:49,405 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 15:38:49,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:49,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680143701] [2021-08-06 15:38:49,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680143701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:49,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497581611] [2021-08-06 15:38:49,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:38:49,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:49,406 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 15:38:49,407 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 15:38:54,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:38:54,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:38:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:54,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:38:54,980 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 15:38:54,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497581611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:54,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:54,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:38:54,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340815244] [2021-08-06 15:38:54,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:38:54,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:38:54,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:38:54,981 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:55,378 INFO L93 Difference]: Finished difference Result 2021 states and 5714 transitions. [2021-08-06 15:38:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:38:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:38:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:55,381 INFO L225 Difference]: With dead ends: 2021 [2021-08-06 15:38:55,381 INFO L226 Difference]: Without dead ends: 2002 [2021-08-06 15:38:55,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:38:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-08-06 15:38:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1527. [2021-08-06 15:38:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8610747051114025) internal successors, (4366), 1526 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4366 transitions. [2021-08-06 15:38:55,398 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4366 transitions. Word has length 33 [2021-08-06 15:38:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:55,398 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4366 transitions. [2021-08-06 15:38:55,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4366 transitions. [2021-08-06 15:38:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:38:55,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:55,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:55,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:55,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:55,600 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1506929981, now seen corresponding path program 75 times [2021-08-06 15:38:55,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:55,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023304674] [2021-08-06 15:38:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:55,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:55,846 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 15:38:55,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:55,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023304674] [2021-08-06 15:38:55,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023304674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:55,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868430532] [2021-08-06 15:38:55,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:38:55,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:55,847 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 15:38:55,848 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 15:39:00,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:39:00,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:00,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:39:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:01,516 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 15:39:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868430532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:01,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:01,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:39:01,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391786358] [2021-08-06 15:39:01,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:39:01,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:01,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:39:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:39:01,517 INFO L87 Difference]: Start difference. First operand 1527 states and 4366 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:02,025 INFO L93 Difference]: Finished difference Result 2017 states and 5700 transitions. [2021-08-06 15:39:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:39:02,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:02,029 INFO L225 Difference]: With dead ends: 2017 [2021-08-06 15:39:02,029 INFO L226 Difference]: Without dead ends: 2002 [2021-08-06 15:39:02,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:39:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-08-06 15:39:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1523. [2021-08-06 15:39:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-08-06 15:39:02,049 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-08-06 15:39:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:02,049 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-08-06 15:39:02,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-08-06 15:39:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:02,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:02,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:02,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:02,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:02,251 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1932089667, now seen corresponding path program 76 times [2021-08-06 15:39:02,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:02,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233247325] [2021-08-06 15:39:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:02,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:02,528 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 15:39:02,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:02,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233247325] [2021-08-06 15:39:02,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233247325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:02,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605855290] [2021-08-06 15:39:02,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:39:02,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:02,529 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 15:39:02,530 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 15:39:07,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:39:07,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:07,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:39:07,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:08,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605855290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:08,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:08,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:39:08,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802560294] [2021-08-06 15:39:08,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:39:08,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:08,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:39:08,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:39:08,228 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:08,975 INFO L93 Difference]: Finished difference Result 1873 states and 5244 transitions. [2021-08-06 15:39:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:39:08,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:08,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:08,978 INFO L225 Difference]: With dead ends: 1873 [2021-08-06 15:39:08,978 INFO L226 Difference]: Without dead ends: 1858 [2021-08-06 15:39:08,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:39:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-08-06 15:39:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1529. [2021-08-06 15:39:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.865183246073298) internal successors, (4378), 1528 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4378 transitions. [2021-08-06 15:39:08,995 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4378 transitions. Word has length 33 [2021-08-06 15:39:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:08,995 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4378 transitions. [2021-08-06 15:39:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4378 transitions. [2021-08-06 15:39:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:08,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:08,997 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:09,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 15:39:09,197 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,SelfDestructingSolverStorable78 [2021-08-06 15:39:09,197 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:09,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:09,198 INFO L82 PathProgramCache]: Analyzing trace with hash 265691081, now seen corresponding path program 77 times [2021-08-06 15:39:09,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:09,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042400785] [2021-08-06 15:39:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:09,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:09,454 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 15:39:09,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:09,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042400785] [2021-08-06 15:39:09,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042400785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:09,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332497106] [2021-08-06 15:39:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:39:09,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:09,455 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 15:39:09,456 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 15:39:14,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:39:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:39:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:15,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332497106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:15,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:15,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:39:15,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230729445] [2021-08-06 15:39:15,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:39:15,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:39:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:39:15,149 INFO L87 Difference]: Start difference. First operand 1529 states and 4378 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:15,834 INFO L93 Difference]: Finished difference Result 1844 states and 5179 transitions. [2021-08-06 15:39:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:39:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:15,837 INFO L225 Difference]: With dead ends: 1844 [2021-08-06 15:39:15,837 INFO L226 Difference]: Without dead ends: 1829 [2021-08-06 15:39:15,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 593.5ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:39:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-08-06 15:39:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1521. [2021-08-06 15:39:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-08-06 15:39:15,853 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-08-06 15:39:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:15,853 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-08-06 15:39:15,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-08-06 15:39:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:15,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:15,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:15,885 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 15:39:16,055 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,SelfDestructingSolverStorable79 [2021-08-06 15:39:16,056 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash -620470029, now seen corresponding path program 78 times [2021-08-06 15:39:16,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:16,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139849141] [2021-08-06 15:39:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:16,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:16,382 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 15:39:16,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:16,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139849141] [2021-08-06 15:39:16,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139849141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:16,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66319893] [2021-08-06 15:39:16,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:39:16,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:16,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:16,383 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 15:39:16,385 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 15:39:21,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:39:21,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:21,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:39:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:21,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:39:22,190 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 15:39:22,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66319893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:22,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:22,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:39:22,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686055087] [2021-08-06 15:39:22,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:39:22,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:39:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:39:22,191 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:22,885 INFO L93 Difference]: Finished difference Result 2332 states and 6559 transitions. [2021-08-06 15:39:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:39:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:22,889 INFO L225 Difference]: With dead ends: 2332 [2021-08-06 15:39:22,889 INFO L226 Difference]: Without dead ends: 2313 [2021-08-06 15:39:22,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:39:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-08-06 15:39:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1529. [2021-08-06 15:39:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.862565445026178) internal successors, (4374), 1528 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4374 transitions. [2021-08-06 15:39:22,907 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4374 transitions. Word has length 33 [2021-08-06 15:39:22,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:22,907 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4374 transitions. [2021-08-06 15:39:22,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:22,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4374 transitions. [2021-08-06 15:39:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:22,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:22,909 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:22,939 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 15:39:23,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:23,109 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:23,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:23,110 INFO L82 PathProgramCache]: Analyzing trace with hash 255712435, now seen corresponding path program 79 times [2021-08-06 15:39:23,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:23,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537685830] [2021-08-06 15:39:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:23,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:23,402 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 15:39:23,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:23,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537685830] [2021-08-06 15:39:23,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537685830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:23,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645875314] [2021-08-06 15:39:23,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:39:23,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:23,403 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 15:39:23,404 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 15:39:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:28,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:39:28,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:29,241 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 15:39:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645875314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:29,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:29,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:39:29,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652159773] [2021-08-06 15:39:29,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:39:29,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:39:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:39:29,242 INFO L87 Difference]: Start difference. First operand 1529 states and 4374 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:30,156 INFO L93 Difference]: Finished difference Result 2008 states and 5650 transitions. [2021-08-06 15:39:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:39:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:30,159 INFO L225 Difference]: With dead ends: 2008 [2021-08-06 15:39:30,159 INFO L226 Difference]: Without dead ends: 1993 [2021-08-06 15:39:30,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 783.7ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:39:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-08-06 15:39:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1521. [2021-08-06 15:39:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-08-06 15:39:30,176 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-08-06 15:39:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-08-06 15:39:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-08-06 15:39:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:30,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:30,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:30,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 15:39:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:30,378 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1529684551, now seen corresponding path program 80 times [2021-08-06 15:39:30,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:30,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619986236] [2021-08-06 15:39:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:30,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:30,648 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 15:39:30,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:30,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619986236] [2021-08-06 15:39:30,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619986236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:30,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230151082] [2021-08-06 15:39:30,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:39:30,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:30,649 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 15:39:30,650 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 15:39:35,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:39:35,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:39:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:36,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:39:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:36,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230151082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:36,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:36,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:39:36,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763350439] [2021-08-06 15:39:36,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:39:36,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:39:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:39:36,739 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:37,778 INFO L93 Difference]: Finished difference Result 2089 states and 5825 transitions. [2021-08-06 15:39:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:39:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:37,781 INFO L225 Difference]: With dead ends: 2089 [2021-08-06 15:39:37,781 INFO L226 Difference]: Without dead ends: 2059 [2021-08-06 15:39:37,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 989.6ms TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:39:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-06 15:39:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1533. [2021-08-06 15:39:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 2.862924281984334) internal successors, (4386), 1532 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 4386 transitions. [2021-08-06 15:39:37,798 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 4386 transitions. Word has length 33 [2021-08-06 15:39:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:37,798 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 4386 transitions. [2021-08-06 15:39:37,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 4386 transitions. [2021-08-06 15:39:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:37,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:37,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:37,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:38,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-06 15:39:38,001 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash -136714035, now seen corresponding path program 81 times [2021-08-06 15:39:38,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:38,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772641747] [2021-08-06 15:39:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:38,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:38,260 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 15:39:38,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:38,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772641747] [2021-08-06 15:39:38,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772641747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:38,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504727842] [2021-08-06 15:39:38,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:39:38,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:38,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:38,266 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 15:39:38,267 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 15:39:43,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:39:43,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:39:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:44,177 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 15:39:44,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504727842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:44,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:44,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:39:44,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982365357] [2021-08-06 15:39:44,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:39:44,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:39:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:39:44,178 INFO L87 Difference]: Start difference. First operand 1533 states and 4386 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:44,844 INFO L93 Difference]: Finished difference Result 2274 states and 6386 transitions. [2021-08-06 15:39:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:39:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:44,848 INFO L225 Difference]: With dead ends: 2274 [2021-08-06 15:39:44,848 INFO L226 Difference]: Without dead ends: 2259 [2021-08-06 15:39:44,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 676.6ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:39:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-08-06 15:39:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1519. [2021-08-06 15:39:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-08-06 15:39:44,865 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-08-06 15:39:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:44,865 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-08-06 15:39:44,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-08-06 15:39:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:44,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:44,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:44,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:45,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:45,067 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1558594751, now seen corresponding path program 82 times [2021-08-06 15:39:45,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:45,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159391842] [2021-08-06 15:39:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:45,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:45,324 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 15:39:45,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:45,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159391842] [2021-08-06 15:39:45,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159391842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:45,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464919320] [2021-08-06 15:39:45,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:39:45,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:45,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:45,325 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 15:39:45,326 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 15:39:50,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:39:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:39:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:51,228 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 15:39:51,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464919320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:51,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:51,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:39:51,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643775785] [2021-08-06 15:39:51,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:39:51,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:39:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:39:51,229 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:51,934 INFO L93 Difference]: Finished difference Result 2479 states and 6940 transitions. [2021-08-06 15:39:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:39:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:51,939 INFO L225 Difference]: With dead ends: 2479 [2021-08-06 15:39:51,940 INFO L226 Difference]: Without dead ends: 2460 [2021-08-06 15:39:51,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:39:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-08-06 15:39:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1523. [2021-08-06 15:39:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-08-06 15:39:51,966 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-08-06 15:39:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:51,967 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-08-06 15:39:51,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-08-06 15:39:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:51,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:51,969 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:52,012 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 15:39:52,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:52,185 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -682412287, now seen corresponding path program 83 times [2021-08-06 15:39:52,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:52,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895752978] [2021-08-06 15:39:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:52,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:52,463 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 15:39:52,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:52,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895752978] [2021-08-06 15:39:52,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895752978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:52,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281360059] [2021-08-06 15:39:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:39:52,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:52,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:52,464 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 15:39:52,465 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 15:39:57,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:39:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:57,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:39:57,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:58,485 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 15:39:58,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281360059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:58,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:58,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:39:58,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228795001] [2021-08-06 15:39:58,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:39:58,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:39:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:39:58,486 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:59,345 INFO L93 Difference]: Finished difference Result 2044 states and 5737 transitions. [2021-08-06 15:39:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:39:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:39:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:59,348 INFO L225 Difference]: With dead ends: 2044 [2021-08-06 15:39:59,348 INFO L226 Difference]: Without dead ends: 2029 [2021-08-06 15:39:59,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 710.5ms TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:39:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-08-06 15:39:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1511. [2021-08-06 15:39:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 2.8596026490066224) internal successors, (4318), 1510 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4318 transitions. [2021-08-06 15:39:59,367 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4318 transitions. Word has length 33 [2021-08-06 15:39:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:59,367 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 4318 transitions. [2021-08-06 15:39:59,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4318 transitions. [2021-08-06 15:39:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:39:59,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:59,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:59,400 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 15:39:59,569 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,SelfDestructingSolverStorable85 [2021-08-06 15:39:59,570 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash -553984637, now seen corresponding path program 84 times [2021-08-06 15:39:59,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:59,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013689567] [2021-08-06 15:39:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:59,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:59,893 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 15:39:59,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:59,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013689567] [2021-08-06 15:39:59,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013689567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:59,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043614401] [2021-08-06 15:39:59,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:39:59,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:59,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:59,909 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 15:39:59,923 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 15:40:05,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:40:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:40:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:05,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-06 15:40:06,311 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 15:40:06,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043614401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:06,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:06,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:40:06,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213026158] [2021-08-06 15:40:06,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:40:06,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:40:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:40:06,313 INFO L87 Difference]: Start difference. First operand 1511 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:07,437 INFO L93 Difference]: Finished difference Result 2034 states and 5661 transitions. [2021-08-06 15:40:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:40:07,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:40:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:07,441 INFO L225 Difference]: With dead ends: 2034 [2021-08-06 15:40:07,441 INFO L226 Difference]: Without dead ends: 2019 [2021-08-06 15:40:07,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1062.6ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:40:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-08-06 15:40:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1517. [2021-08-06 15:40:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.862796833773087) internal successors, (4340), 1516 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4340 transitions. [2021-08-06 15:40:07,460 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4340 transitions. Word has length 33 [2021-08-06 15:40:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:07,460 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 4340 transitions. [2021-08-06 15:40:07,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4340 transitions. [2021-08-06 15:40:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 15:40:07,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:07,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:07,496 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 15:40:07,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:07,663 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:07,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2074584073, now seen corresponding path program 85 times [2021-08-06 15:40:07,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:07,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395295727] [2021-08-06 15:40:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:07,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:08,005 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 15:40:08,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:08,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395295727] [2021-08-06 15:40:08,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395295727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:08,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078738488] [2021-08-06 15:40:08,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:40:08,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:08,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:08,009 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 15:40:08,017 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 15:40:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:40:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:14,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078738488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:14,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:14,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 15:40:14,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563298897] [2021-08-06 15:40:14,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:40:14,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:40:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:40:14,152 INFO L87 Difference]: Start difference. First operand 1517 states and 4340 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:14,634 INFO L93 Difference]: Finished difference Result 2295 states and 6421 transitions. [2021-08-06 15:40:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:40:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 15:40:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:14,638 INFO L225 Difference]: With dead ends: 2295 [2021-08-06 15:40:14,638 INFO L226 Difference]: Without dead ends: 2280 [2021-08-06 15:40:14,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:40:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-08-06 15:40:14,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1450. [2021-08-06 15:40:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.8612836438923397) internal successors, (4146), 1449 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4146 transitions. [2021-08-06 15:40:14,655 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4146 transitions. Word has length 33 [2021-08-06 15:40:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:14,655 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 4146 transitions. [2021-08-06 15:40:14,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4146 transitions. [2021-08-06 15:40:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:40:14,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:14,656 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:14,688 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 15:40:14,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:14,857 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1434777477, now seen corresponding path program 1 times [2021-08-06 15:40:14,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:14,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524352593] [2021-08-06 15:40:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:14,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:14,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:14,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524352593] [2021-08-06 15:40:14,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524352593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:14,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268418077] [2021-08-06 15:40:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:14,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:14,953 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 15:40:14,954 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 15:40:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:20,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 15:40:20,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:40:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268418077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:20,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:20,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 15:40:20,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498278165] [2021-08-06 15:40:20,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:40:20,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:40:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:40:20,640 INFO L87 Difference]: Start difference. First operand 1450 states and 4146 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 15:40:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:20,696 INFO L93 Difference]: Finished difference Result 1940 states and 5616 transitions. [2021-08-06 15:40:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:40:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2021-08-06 15:40:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:20,699 INFO L225 Difference]: With dead ends: 1940 [2021-08-06 15:40:20,699 INFO L226 Difference]: Without dead ends: 1940 [2021-08-06 15:40:20,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:40:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-08-06 15:40:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1810. [2021-08-06 15:40:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.902155887230514) internal successors, (5250), 1809 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5250 transitions. [2021-08-06 15:40:20,718 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5250 transitions. Word has length 37 [2021-08-06 15:40:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:20,718 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 5250 transitions. [2021-08-06 15:40:20,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 15:40:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5250 transitions. [2021-08-06 15:40:20,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 15:40:20,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:20,720 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:20,754 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 15:40:20,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-06 15:40:20,929 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1856254911, now seen corresponding path program 86 times [2021-08-06 15:40:20,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:20,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656868069] [2021-08-06 15:40:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:20,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:21,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:21,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656868069] [2021-08-06 15:40:21,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656868069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:21,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132984223] [2021-08-06 15:40:21,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:40:21,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:21,030 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 15:40:21,030 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 15:40:26,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:40:26,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:40:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:26,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132984223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:26,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:26,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-06 15:40:26,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678279922] [2021-08-06 15:40:26,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:40:26,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:40:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:40:26,771 INFO L87 Difference]: Start difference. First operand 1810 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 15:40:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:26,784 INFO L93 Difference]: Finished difference Result 2953 states and 8537 transitions. [2021-08-06 15:40:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:40:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 38 [2021-08-06 15:40:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:26,788 INFO L225 Difference]: With dead ends: 2953 [2021-08-06 15:40:26,788 INFO L226 Difference]: Without dead ends: 2856 [2021-08-06 15:40:26,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:40:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-08-06 15:40:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2284. [2021-08-06 15:40:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.9890494962768286) internal successors, (6824), 2283 states have internal predecessors, (6824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6824 transitions. [2021-08-06 15:40:26,815 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6824 transitions. Word has length 38 [2021-08-06 15:40:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:26,815 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 6824 transitions. [2021-08-06 15:40:26,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 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 15:40:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6824 transitions. [2021-08-06 15:40:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 15:40:26,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:26,818 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:26,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 15:40:27,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:27,019 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:27,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:27,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1630144413, now seen corresponding path program 87 times [2021-08-06 15:40:27,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:27,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105285534] [2021-08-06 15:40:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:27,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:40:27,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:27,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105285534] [2021-08-06 15:40:27,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105285534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:27,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054625432] [2021-08-06 15:40:27,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:40:27,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:27,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:27,058 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 15:40:27,059 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 15:40:32,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:40:32,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:40:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:40:32,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054625432] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:40:32,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 15:40:32,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-06 15:40:32,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740095319] [2021-08-06 15:40:32,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:40:32,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:40:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:40:32,813 INFO L87 Difference]: Start difference. First operand 2284 states and 6824 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:32,837 INFO L93 Difference]: Finished difference Result 6496 states and 19271 transitions. [2021-08-06 15:40:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:40:32,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 15:40:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:32,846 INFO L225 Difference]: With dead ends: 6496 [2021-08-06 15:40:32,846 INFO L226 Difference]: Without dead ends: 6091 [2021-08-06 15:40:32,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:40:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-08-06 15:40:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5331. [2021-08-06 15:40:32,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.052908067542214) internal successors, (16272), 5330 states have internal predecessors, (16272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 16272 transitions. [2021-08-06 15:40:32,920 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 16272 transitions. Word has length 39 [2021-08-06 15:40:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:32,920 INFO L470 AbstractCegarLoop]: Abstraction has 5331 states and 16272 transitions. [2021-08-06 15:40:32,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 16272 transitions. [2021-08-06 15:40:32,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 15:40:32,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:32,927 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:32,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 15:40:33,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:33,127 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1568623265, now seen corresponding path program 2 times [2021-08-06 15:40:33,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:33,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698809135] [2021-08-06 15:40:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:33,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:33,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:33,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698809135] [2021-08-06 15:40:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698809135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:33,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865384754] [2021-08-06 15:40:33,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:40:33,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:33,230 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 15:40:33,231 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 15:40:38,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:40:38,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:40:38,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:40:39,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:40:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:39,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865384754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:39,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:39,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 15:40:39,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360520494] [2021-08-06 15:40:39,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:40:39,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:39,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:40:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:40:39,173 INFO L87 Difference]: Start difference. First operand 5331 states and 16272 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:39,368 INFO L93 Difference]: Finished difference Result 7486 states and 22666 transitions. [2021-08-06 15:40:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:40:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 43 [2021-08-06 15:40:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:39,382 INFO L225 Difference]: With dead ends: 7486 [2021-08-06 15:40:39,382 INFO L226 Difference]: Without dead ends: 7486 [2021-08-06 15:40:39,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:40:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-08-06 15:40:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 6990. [2021-08-06 15:40:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.0479324653026185) internal successors, (21302), 6989 states have internal predecessors, (21302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 21302 transitions. [2021-08-06 15:40:39,498 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 21302 transitions. Word has length 43 [2021-08-06 15:40:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:39,498 INFO L470 AbstractCegarLoop]: Abstraction has 6990 states and 21302 transitions. [2021-08-06 15:40:39,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 21302 transitions. [2021-08-06 15:40:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:40:39,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:39,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:39,542 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 15:40:39,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:39,709 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1131601065, now seen corresponding path program 3 times [2021-08-06 15:40:39,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:39,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199011409] [2021-08-06 15:40:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:39,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:40,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:40,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199011409] [2021-08-06 15:40:40,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199011409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:40,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424678422] [2021-08-06 15:40:40,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:40:40,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:40,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:40,634 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 15:40:40,635 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 15:40:46,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:40:46,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:46,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:40:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:46,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:40:46,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:40:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:47,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424678422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:47,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:47,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:40:47,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015439056] [2021-08-06 15:40:47,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:40:47,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:40:47,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:40:47,756 INFO L87 Difference]: Start difference. First operand 6990 states and 21302 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:49,507 INFO L93 Difference]: Finished difference Result 9371 states and 28152 transitions. [2021-08-06 15:40:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:40:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:40:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:49,524 INFO L225 Difference]: With dead ends: 9371 [2021-08-06 15:40:49,524 INFO L226 Difference]: Without dead ends: 9227 [2021-08-06 15:40:49,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1921.4ms TimeCoverageRelationStatistics Valid=307, Invalid=3599, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:40:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-08-06 15:40:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 7110. [2021-08-06 15:40:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 7109 states have (on average 3.039668026445351) internal successors, (21609), 7109 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 21609 transitions. [2021-08-06 15:40:49,676 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 21609 transitions. Word has length 48 [2021-08-06 15:40:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:49,676 INFO L470 AbstractCegarLoop]: Abstraction has 7110 states and 21609 transitions. [2021-08-06 15:40:49,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 21609 transitions. [2021-08-06 15:40:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:40:49,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:49,686 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:49,718 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 15:40:49,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-08-06 15:40:49,887 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:49,887 INFO L82 PathProgramCache]: Analyzing trace with hash 362868969, now seen corresponding path program 4 times [2021-08-06 15:40:49,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:49,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62376529] [2021-08-06 15:40:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:49,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:50,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:50,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62376529] [2021-08-06 15:40:50,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62376529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:50,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856331779] [2021-08-06 15:40:50,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:40:50,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:50,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:50,824 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 15:40:50,825 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 15:40:56,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:40:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:40:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:56,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:40:57,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:40:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:57,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856331779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:57,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:57,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:40:57,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662326421] [2021-08-06 15:40:57,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:40:57,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:40:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:40:57,994 INFO L87 Difference]: Start difference. First operand 7110 states and 21609 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:59,500 INFO L93 Difference]: Finished difference Result 9329 states and 28074 transitions. [2021-08-06 15:40:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:40:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:40:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:59,517 INFO L225 Difference]: With dead ends: 9329 [2021-08-06 15:40:59,517 INFO L226 Difference]: Without dead ends: 9294 [2021-08-06 15:40:59,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1714.1ms TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:40:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9294 states. [2021-08-06 15:40:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9294 to 7122. [2021-08-06 15:40:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7122 states, 7121 states have (on average 3.0386181716051115) internal successors, (21638), 7121 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 21638 transitions. [2021-08-06 15:40:59,659 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 21638 transitions. Word has length 48 [2021-08-06 15:40:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:59,659 INFO L470 AbstractCegarLoop]: Abstraction has 7122 states and 21638 transitions. [2021-08-06 15:40:59,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 21638 transitions. [2021-08-06 15:40:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:40:59,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:59,669 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:59,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:59,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:59,869 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:59,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1239051433, now seen corresponding path program 5 times [2021-08-06 15:40:59,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:59,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745592620] [2021-08-06 15:40:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:59,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:00,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:00,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745592620] [2021-08-06 15:41:00,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745592620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:00,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120412862] [2021-08-06 15:41:00,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:41:00,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:00,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:00,604 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 15:41:00,604 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 15:41:06,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:41:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:06,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:41:06,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:06,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:41:07,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:41:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120412862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:08,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:08,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:41:08,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365830927] [2021-08-06 15:41:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:41:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:08,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:41:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:41:08,058 INFO L87 Difference]: Start difference. First operand 7122 states and 21638 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:09,944 INFO L93 Difference]: Finished difference Result 8081 states and 24502 transitions. [2021-08-06 15:41:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:41:09,944 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:41:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:09,959 INFO L225 Difference]: With dead ends: 8081 [2021-08-06 15:41:09,959 INFO L226 Difference]: Without dead ends: 8037 [2021-08-06 15:41:09,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1862.1ms TimeCoverageRelationStatistics Valid=309, Invalid=3473, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:41:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-06 15:41:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7118. [2021-08-06 15:41:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.038780384993677) internal successors, (21627), 7117 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21627 transitions. [2021-08-06 15:41:10,083 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21627 transitions. Word has length 48 [2021-08-06 15:41:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:10,083 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21627 transitions. [2021-08-06 15:41:10,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21627 transitions. [2021-08-06 15:41:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:41:10,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:10,093 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:10,126 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 15:41:10,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:10,294 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:10,294 INFO L82 PathProgramCache]: Analyzing trace with hash 504584109, now seen corresponding path program 6 times [2021-08-06 15:41:10,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:10,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968416306] [2021-08-06 15:41:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:10,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:11,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:11,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968416306] [2021-08-06 15:41:11,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968416306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:11,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45278378] [2021-08-06 15:41:11,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:41:11,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:11,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:11,097 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 15:41:11,098 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 15:41:16,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:41:16,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:41:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:17,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:41:17,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:41:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:18,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45278378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:18,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:18,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:41:18,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087223654] [2021-08-06 15:41:18,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:41:18,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:18,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:41:18,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:41:18,521 INFO L87 Difference]: Start difference. First operand 7118 states and 21627 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:20,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:20,099 INFO L93 Difference]: Finished difference Result 9350 states and 28063 transitions. [2021-08-06 15:41:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:41:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:41:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:20,117 INFO L225 Difference]: With dead ends: 9350 [2021-08-06 15:41:20,117 INFO L226 Difference]: Without dead ends: 9293 [2021-08-06 15:41:20,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1698.9ms TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:41:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2021-08-06 15:41:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 7124. [2021-08-06 15:41:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0380457672329073) internal successors, (21640), 7123 states have internal predecessors, (21640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21640 transitions. [2021-08-06 15:41:20,235 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21640 transitions. Word has length 48 [2021-08-06 15:41:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:20,235 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21640 transitions. [2021-08-06 15:41:20,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21640 transitions. [2021-08-06 15:41:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:41:20,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:20,245 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:20,278 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 15:41:20,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:20,446 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:20,446 INFO L82 PathProgramCache]: Analyzing trace with hash -778563351, now seen corresponding path program 7 times [2021-08-06 15:41:20,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:20,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084632521] [2021-08-06 15:41:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:20,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:21,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:21,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084632521] [2021-08-06 15:41:21,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084632521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:21,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369957886] [2021-08-06 15:41:21,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:41:21,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:21,194 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 15:41:21,195 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 15:41:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:41:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:27,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:41:27,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:41:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:28,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369957886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:28,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:28,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:41:28,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364498446] [2021-08-06 15:41:28,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:41:28,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:41:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:41:28,702 INFO L87 Difference]: Start difference. First operand 7124 states and 21640 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:30,214 INFO L93 Difference]: Finished difference Result 9305 states and 27967 transitions. [2021-08-06 15:41:30,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:41:30,214 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:41:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:30,231 INFO L225 Difference]: With dead ends: 9305 [2021-08-06 15:41:30,231 INFO L226 Difference]: Without dead ends: 9211 [2021-08-06 15:41:30,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1602.2ms TimeCoverageRelationStatistics Valid=271, Invalid=3269, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:41:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2021-08-06 15:41:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 7104. [2021-08-06 15:41:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.040546248064198) internal successors, (21597), 7103 states have internal predecessors, (21597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21597 transitions. [2021-08-06 15:41:30,361 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21597 transitions. Word has length 48 [2021-08-06 15:41:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:30,361 INFO L470 AbstractCegarLoop]: Abstraction has 7104 states and 21597 transitions. [2021-08-06 15:41:30,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21597 transitions. [2021-08-06 15:41:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:41:30,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:30,377 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:30,417 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 15:41:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:30,593 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:30,593 INFO L82 PathProgramCache]: Analyzing trace with hash 236808205, now seen corresponding path program 8 times [2021-08-06 15:41:30,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:30,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057417859] [2021-08-06 15:41:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:30,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:31,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:31,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057417859] [2021-08-06 15:41:31,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057417859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:31,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768814779] [2021-08-06 15:41:31,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:41:31,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:31,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:31,394 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 15:41:31,395 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 15:41:37,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:41:37,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 15:41:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:37,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:41:38,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:41:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:38,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768814779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:38,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:38,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:41:38,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230283505] [2021-08-06 15:41:38,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:41:38,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:41:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:41:38,932 INFO L87 Difference]: Start difference. First operand 7104 states and 21597 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:40,711 INFO L93 Difference]: Finished difference Result 9439 states and 28296 transitions. [2021-08-06 15:41:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:41:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:41:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:40,728 INFO L225 Difference]: With dead ends: 9439 [2021-08-06 15:41:40,728 INFO L226 Difference]: Without dead ends: 9295 [2021-08-06 15:41:40,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1762.8ms TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:41:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2021-08-06 15:41:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 7164. [2021-08-06 15:41:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7163 states have (on average 3.034063939690074) internal successors, (21733), 7163 states have internal predecessors, (21733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 21733 transitions. [2021-08-06 15:41:40,845 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 21733 transitions. Word has length 48 [2021-08-06 15:41:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:40,845 INFO L470 AbstractCegarLoop]: Abstraction has 7164 states and 21733 transitions. [2021-08-06 15:41:40,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 21733 transitions. [2021-08-06 15:41:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:41:40,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:40,860 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:40,905 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 15:41:41,084 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,SelfDestructingSolverStorable97 [2021-08-06 15:41:41,085 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash 201175157, now seen corresponding path program 9 times [2021-08-06 15:41:41,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:41,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598515341] [2021-08-06 15:41:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:41,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:41,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:41,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598515341] [2021-08-06 15:41:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598515341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:41,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881869698] [2021-08-06 15:41:41,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:41:41,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:41,846 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 15:41:41,847 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 15:41:48,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:41:48,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 15:41:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:48,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:41:48,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:41:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:49,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881869698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:49,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:49,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:41:49,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468694505] [2021-08-06 15:41:49,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:41:49,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:41:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:41:49,601 INFO L87 Difference]: Start difference. First operand 7164 states and 21733 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:51,362 INFO L93 Difference]: Finished difference Result 8182 states and 24723 transitions. [2021-08-06 15:41:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:41:51,362 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:41:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:51,377 INFO L225 Difference]: With dead ends: 8182 [2021-08-06 15:41:51,377 INFO L226 Difference]: Without dead ends: 8142 [2021-08-06 15:41:51,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1971.8ms TimeCoverageRelationStatistics Valid=315, Invalid=3591, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:41:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2021-08-06 15:41:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7182. [2021-08-06 15:41:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0327252471800583) internal successors, (21778), 7181 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21778 transitions. [2021-08-06 15:41:51,482 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21778 transitions. Word has length 48 [2021-08-06 15:41:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:51,482 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 21778 transitions. [2021-08-06 15:41:51,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21778 transitions. [2021-08-06 15:41:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:41:51,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:51,492 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:51,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:51,692 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,SelfDestructingSolverStorable98 [2021-08-06 15:41:51,693 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash -27583687, now seen corresponding path program 10 times [2021-08-06 15:41:51,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:51,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489898932] [2021-08-06 15:41:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:51,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:52,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:52,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489898932] [2021-08-06 15:41:52,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489898932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:52,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333353013] [2021-08-06 15:41:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:41:52,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:52,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:52,439 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 15:41:52,439 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 15:41:58,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:41:58,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:41:58,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:41:59,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:42:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:00,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333353013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:00,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:00,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:42:00,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445616229] [2021-08-06 15:42:00,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:42:00,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:00,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:42:00,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:42:00,219 INFO L87 Difference]: Start difference. First operand 7182 states and 21778 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:01,953 INFO L93 Difference]: Finished difference Result 9375 states and 28170 transitions. [2021-08-06 15:42:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:42:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:42:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:01,970 INFO L225 Difference]: With dead ends: 9375 [2021-08-06 15:42:01,970 INFO L226 Difference]: Without dead ends: 9330 [2021-08-06 15:42:01,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1676.1ms TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:42:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-08-06 15:42:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7176. [2021-08-06 15:42:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 3.0326132404181183) internal successors, (21759), 7175 states have internal predecessors, (21759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 21759 transitions. [2021-08-06 15:42:02,088 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 21759 transitions. Word has length 48 [2021-08-06 15:42:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:02,088 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 21759 transitions. [2021-08-06 15:42:02,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 21759 transitions. [2021-08-06 15:42:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:42:02,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:02,097 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:02,131 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 15:42:02,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 15:42:02,298 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash -974315487, now seen corresponding path program 11 times [2021-08-06 15:42:02,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:02,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574275043] [2021-08-06 15:42:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:02,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:03,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:03,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574275043] [2021-08-06 15:42:03,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574275043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:03,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912540113] [2021-08-06 15:42:03,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:42:03,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:03,201 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 15:42:03,202 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 15:42:09,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:42:09,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:42:09,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:09,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:42:10,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:42:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:11,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912540113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:11,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:11,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:42:11,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293434416] [2021-08-06 15:42:11,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:42:11,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:42:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:42:11,021 INFO L87 Difference]: Start difference. First operand 7176 states and 21759 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:12,654 INFO L93 Difference]: Finished difference Result 9432 states and 28244 transitions. [2021-08-06 15:42:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:42:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:42:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:12,670 INFO L225 Difference]: With dead ends: 9432 [2021-08-06 15:42:12,670 INFO L226 Difference]: Without dead ends: 9373 [2021-08-06 15:42:12,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1701.8ms TimeCoverageRelationStatistics Valid=271, Invalid=3269, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:42:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-08-06 15:42:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 7182. [2021-08-06 15:42:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7181 states have (on average 3.0318897089541847) internal successors, (21772), 7181 states have internal predecessors, (21772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 21772 transitions. [2021-08-06 15:42:12,786 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 21772 transitions. Word has length 48 [2021-08-06 15:42:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:12,786 INFO L470 AbstractCegarLoop]: Abstraction has 7182 states and 21772 transitions. [2021-08-06 15:42:12,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 21772 transitions. [2021-08-06 15:42:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:42:12,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:12,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:12,830 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 15:42:12,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:12,996 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:12,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1128753005, now seen corresponding path program 12 times [2021-08-06 15:42:12,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:12,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025216308] [2021-08-06 15:42:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:12,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:13,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:13,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025216308] [2021-08-06 15:42:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025216308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:13,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520330682] [2021-08-06 15:42:13,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:42:13,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:13,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:13,848 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 15:42:13,848 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 15:42:20,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:42:20,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:20,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:42:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:42:21,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:42:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:21,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520330682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:21,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:21,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2021-08-06 15:42:21,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204254182] [2021-08-06 15:42:21,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:42:21,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:21,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:42:21,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:42:21,932 INFO L87 Difference]: Start difference. First operand 7182 states and 21772 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:23,516 INFO L93 Difference]: Finished difference Result 9379 states and 28131 transitions. [2021-08-06 15:42:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:42:23,517 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:42:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:23,532 INFO L225 Difference]: With dead ends: 9379 [2021-08-06 15:42:23,532 INFO L226 Difference]: Without dead ends: 9223 [2021-08-06 15:42:23,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1795.8ms TimeCoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:42:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-08-06 15:42:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 7116. [2021-08-06 15:42:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.036261419536191) internal successors, (21603), 7115 states have internal predecessors, (21603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21603 transitions. [2021-08-06 15:42:23,643 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21603 transitions. Word has length 48 [2021-08-06 15:42:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:23,643 INFO L470 AbstractCegarLoop]: Abstraction has 7116 states and 21603 transitions. [2021-08-06 15:42:23,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21603 transitions. [2021-08-06 15:42:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:42:23,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:23,652 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:23,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:23,852 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,SelfDestructingSolverStorable101 [2021-08-06 15:42:23,853 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:23,853 INFO L82 PathProgramCache]: Analyzing trace with hash 766644457, now seen corresponding path program 13 times [2021-08-06 15:42:23,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:23,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218781521] [2021-08-06 15:42:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:23,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:24,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:24,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218781521] [2021-08-06 15:42:24,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218781521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:24,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560838572] [2021-08-06 15:42:24,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:42:24,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:24,566 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 15:42:24,567 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 15:42:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:42:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:31,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:42:31,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:42:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:32,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560838572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:32,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:32,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:42:32,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267245109] [2021-08-06 15:42:32,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:42:32,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:42:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:42:32,681 INFO L87 Difference]: Start difference. First operand 7116 states and 21603 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:34,592 INFO L93 Difference]: Finished difference Result 8090 states and 24505 transitions. [2021-08-06 15:42:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:42:34,592 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:42:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:34,605 INFO L225 Difference]: With dead ends: 8090 [2021-08-06 15:42:34,605 INFO L226 Difference]: Without dead ends: 8055 [2021-08-06 15:42:34,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1789.9ms TimeCoverageRelationStatistics Valid=302, Invalid=3358, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:42:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-08-06 15:42:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 7124. [2021-08-06 15:42:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2021-08-06 15:42:34,719 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2021-08-06 15:42:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:34,720 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2021-08-06 15:42:34,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2021-08-06 15:42:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:42:34,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:34,729 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:34,762 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 15:42:34,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:34,929 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1642826921, now seen corresponding path program 14 times [2021-08-06 15:42:34,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:34,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718181561] [2021-08-06 15:42:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:34,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:35,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:35,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718181561] [2021-08-06 15:42:35,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718181561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:35,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971023866] [2021-08-06 15:42:35,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:42:35,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:35,715 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 15:42:35,716 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 15:42:42,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:42:42,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:42:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:42:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:42:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971023866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:43,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:43,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:42:43,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465332103] [2021-08-06 15:42:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:42:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:42:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:42:43,996 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:45,915 INFO L93 Difference]: Finished difference Result 8124 states and 24566 transitions. [2021-08-06 15:42:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:42:45,915 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:42:45,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:45,928 INFO L225 Difference]: With dead ends: 8124 [2021-08-06 15:42:45,929 INFO L226 Difference]: Without dead ends: 8080 [2021-08-06 15:42:45,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1950.1ms TimeCoverageRelationStatistics Valid=327, Invalid=3455, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:42:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-08-06 15:42:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7120. [2021-08-06 15:42:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.0361005759235846) internal successors, (21614), 7119 states have internal predecessors, (21614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21614 transitions. [2021-08-06 15:42:46,046 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21614 transitions. Word has length 48 [2021-08-06 15:42:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:46,046 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21614 transitions. [2021-08-06 15:42:46,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21614 transitions. [2021-08-06 15:42:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:42:46,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:46,056 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:46,091 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 15:42:46,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:42:46,256 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash -460309207, now seen corresponding path program 15 times [2021-08-06 15:42:46,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:46,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284931157] [2021-08-06 15:42:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:46,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:46,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:46,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284931157] [2021-08-06 15:42:46,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284931157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:46,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803462615] [2021-08-06 15:42:46,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:42:46,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:46,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:46,975 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 15:42:46,975 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 15:42:53,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:42:53,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:53,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 15:42:53,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:54,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:42:54,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:42:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:55,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803462615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:55,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:55,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:42:55,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018686888] [2021-08-06 15:42:55,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:42:55,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:42:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:42:55,265 INFO L87 Difference]: Start difference. First operand 7120 states and 21614 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:56,955 INFO L93 Difference]: Finished difference Result 9313 states and 28008 transitions. [2021-08-06 15:42:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:42:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:42:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:56,971 INFO L225 Difference]: With dead ends: 9313 [2021-08-06 15:42:56,971 INFO L226 Difference]: Without dead ends: 9278 [2021-08-06 15:42:56,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1608.4ms TimeCoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:42:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2021-08-06 15:42:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 7124. [2021-08-06 15:42:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7123 states have (on average 3.0355187421030463) internal successors, (21622), 7123 states have internal predecessors, (21622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 21622 transitions. [2021-08-06 15:42:57,089 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 21622 transitions. Word has length 48 [2021-08-06 15:42:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:57,089 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 21622 transitions. [2021-08-06 15:42:57,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 21622 transitions. [2021-08-06 15:42:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:42:57,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:57,099 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:57,135 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 15:42:57,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:57,299 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2001740685, now seen corresponding path program 16 times [2021-08-06 15:42:57,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:57,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787030646] [2021-08-06 15:42:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:57,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:58,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:58,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787030646] [2021-08-06 15:42:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787030646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:58,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428430223] [2021-08-06 15:42:58,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:42:58,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:58,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:58,130 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 15:42:58,131 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 15:43:04,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:43:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:43:04,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:05,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:43:05,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:43:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:06,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428430223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:06,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:06,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:43:06,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096753780] [2021-08-06 15:43:06,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:43:06,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:06,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:43:06,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:43:06,406 INFO L87 Difference]: Start difference. First operand 7124 states and 21622 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:07,904 INFO L93 Difference]: Finished difference Result 9317 states and 28014 transitions. [2021-08-06 15:43:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:43:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:43:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:07,920 INFO L225 Difference]: With dead ends: 9317 [2021-08-06 15:43:07,920 INFO L226 Difference]: Without dead ends: 9274 [2021-08-06 15:43:07,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1747.4ms TimeCoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:43:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2021-08-06 15:43:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 7120. [2021-08-06 15:43:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035819637589549) internal successors, (21612), 7119 states have internal predecessors, (21612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21612 transitions. [2021-08-06 15:43:08,054 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21612 transitions. Word has length 48 [2021-08-06 15:43:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:08,054 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21612 transitions. [2021-08-06 15:43:08,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21612 transitions. [2021-08-06 15:43:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:43:08,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:08,064 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:08,106 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 15:43:08,264 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,SelfDestructingSolverStorable105 [2021-08-06 15:43:08,264 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1145793037, now seen corresponding path program 17 times [2021-08-06 15:43:08,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:08,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678577322] [2021-08-06 15:43:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:08,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:09,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:09,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678577322] [2021-08-06 15:43:09,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678577322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:09,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296312156] [2021-08-06 15:43:09,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:43:09,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:09,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:09,121 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 15:43:09,121 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 15:43:16,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:43:16,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:43:16,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:16,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:43:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:43:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:17,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296312156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:17,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:17,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:43:17,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670296182] [2021-08-06 15:43:17,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:43:17,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:43:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:43:17,579 INFO L87 Difference]: Start difference. First operand 7120 states and 21612 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:19,427 INFO L93 Difference]: Finished difference Result 8126 states and 24570 transitions. [2021-08-06 15:43:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:43:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:43:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:19,441 INFO L225 Difference]: With dead ends: 8126 [2021-08-06 15:43:19,441 INFO L226 Difference]: Without dead ends: 8086 [2021-08-06 15:43:19,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1994.6ms TimeCoverageRelationStatistics Valid=327, Invalid=3455, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:43:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8086 states. [2021-08-06 15:43:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8086 to 7126. [2021-08-06 15:43:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0350877192982457) internal successors, (21625), 7125 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21625 transitions. [2021-08-06 15:43:19,542 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21625 transitions. Word has length 48 [2021-08-06 15:43:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:19,542 INFO L470 AbstractCegarLoop]: Abstraction has 7126 states and 21625 transitions. [2021-08-06 15:43:19,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21625 transitions. [2021-08-06 15:43:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:43:19,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:19,551 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:19,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 15:43:19,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:19,752 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash -520605549, now seen corresponding path program 18 times [2021-08-06 15:43:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:19,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411737410] [2021-08-06 15:43:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:19,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:20,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:20,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411737410] [2021-08-06 15:43:20,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411737410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:20,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247435474] [2021-08-06 15:43:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:43:20,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:20,528 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 15:43:20,528 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 15:43:27,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:43:27,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:43:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:27,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:43:28,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:43:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247435474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:29,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:29,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:43:29,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093075680] [2021-08-06 15:43:29,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:43:29,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:43:29,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:43:29,126 INFO L87 Difference]: Start difference. First operand 7126 states and 21625 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:30,817 INFO L93 Difference]: Finished difference Result 8084 states and 24484 transitions. [2021-08-06 15:43:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:43:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:43:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:30,831 INFO L225 Difference]: With dead ends: 8084 [2021-08-06 15:43:30,831 INFO L226 Difference]: Without dead ends: 8037 [2021-08-06 15:43:30,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1872.1ms TimeCoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:43:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-06 15:43:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7118. [2021-08-06 15:43:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0359702121680483) internal successors, (21607), 7117 states have internal predecessors, (21607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21607 transitions. [2021-08-06 15:43:30,929 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21607 transitions. Word has length 48 [2021-08-06 15:43:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21607 transitions. [2021-08-06 15:43:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21607 transitions. [2021-08-06 15:43:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:43:30,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:30,938 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:30,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 15:43:31,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:31,139 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:31,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1406766659, now seen corresponding path program 19 times [2021-08-06 15:43:31,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:31,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696466115] [2021-08-06 15:43:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:31,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:31,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:31,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696466115] [2021-08-06 15:43:31,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696466115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:31,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278960730] [2021-08-06 15:43:31,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:43:31,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:31,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:31,993 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 15:43:31,994 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 15:43:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:39,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:43:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:39,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:43:39,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:43:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:40,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278960730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:40,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:40,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:43:40,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287420881] [2021-08-06 15:43:40,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:43:40,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:43:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:43:40,733 INFO L87 Difference]: Start difference. First operand 7118 states and 21607 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:42,429 INFO L93 Difference]: Finished difference Result 9370 states and 28127 transitions. [2021-08-06 15:43:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:43:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:43:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:42,445 INFO L225 Difference]: With dead ends: 9370 [2021-08-06 15:43:42,445 INFO L226 Difference]: Without dead ends: 9335 [2021-08-06 15:43:42,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1731.0ms TimeCoverageRelationStatistics Valid=279, Invalid=3381, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:43:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-08-06 15:43:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7126. [2021-08-06 15:43:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7126 states, 7125 states have (on average 3.0350877192982457) internal successors, (21625), 7125 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7126 states to 7126 states and 21625 transitions. [2021-08-06 15:43:42,576 INFO L78 Accepts]: Start accepts. Automaton has 7126 states and 21625 transitions. Word has length 48 [2021-08-06 15:43:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:42,576 INFO L470 AbstractCegarLoop]: Abstraction has 7126 states and 21625 transitions. [2021-08-06 15:43:42,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 7126 states and 21625 transitions. [2021-08-06 15:43:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:43:42,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:42,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:42,621 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 15:43:42,785 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,SelfDestructingSolverStorable108 [2021-08-06 15:43:42,786 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:42,786 INFO L82 PathProgramCache]: Analyzing trace with hash -530584195, now seen corresponding path program 20 times [2021-08-06 15:43:42,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:42,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581121189] [2021-08-06 15:43:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:42,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:43,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:43,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581121189] [2021-08-06 15:43:43,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581121189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:43,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755291950] [2021-08-06 15:43:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:43:43,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:43,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:43,531 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 15:43:43,531 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 15:43:50,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:43:50,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:50,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:43:50,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:51,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:43:51,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:43:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:52,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755291950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:52,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:52,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:43:52,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195115296] [2021-08-06 15:43:52,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:43:52,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:52,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:43:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:43:52,362 INFO L87 Difference]: Start difference. First operand 7126 states and 21625 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:54,041 INFO L93 Difference]: Finished difference Result 8098 states and 24520 transitions. [2021-08-06 15:43:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:43:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:43:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:54,055 INFO L225 Difference]: With dead ends: 8098 [2021-08-06 15:43:54,055 INFO L226 Difference]: Without dead ends: 8037 [2021-08-06 15:43:54,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1786.7ms TimeCoverageRelationStatistics Valid=312, Invalid=3470, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:43:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-06 15:43:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7118. [2021-08-06 15:43:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 3.0358297035267667) internal successors, (21606), 7117 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 21606 transitions. [2021-08-06 15:43:54,150 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 21606 transitions. Word has length 48 [2021-08-06 15:43:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:54,150 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 21606 transitions. [2021-08-06 15:43:54,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 21606 transitions. [2021-08-06 15:43:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:43:54,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:54,160 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:43:54,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 15:43:54,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:54,360 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 743387921, now seen corresponding path program 21 times [2021-08-06 15:43:54,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:54,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60828597] [2021-08-06 15:43:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:54,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:55,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:55,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60828597] [2021-08-06 15:43:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60828597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:55,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965291202] [2021-08-06 15:43:55,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:43:55,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:55,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:55,170 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 15:43:55,171 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 15:44:02,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:44:02,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:02,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 15:44:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:02,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:44:03,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:44:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965291202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:04,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:04,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:44:04,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707777305] [2021-08-06 15:44:04,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:44:04,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:44:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:44:04,025 INFO L87 Difference]: Start difference. First operand 7118 states and 21606 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:05,869 INFO L93 Difference]: Finished difference Result 8143 states and 24611 transitions. [2021-08-06 15:44:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:44:05,869 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:44:05,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:05,882 INFO L225 Difference]: With dead ends: 8143 [2021-08-06 15:44:05,882 INFO L226 Difference]: Without dead ends: 8090 [2021-08-06 15:44:05,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1910.0ms TimeCoverageRelationStatistics Valid=321, Invalid=3585, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:44:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-08-06 15:44:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7130. [2021-08-06 15:44:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7130 states, 7129 states have (on average 3.0343666713424042) internal successors, (21632), 7129 states have internal predecessors, (21632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7130 states to 7130 states and 21632 transitions. [2021-08-06 15:44:05,978 INFO L78 Accepts]: Start accepts. Automaton has 7130 states and 21632 transitions. Word has length 48 [2021-08-06 15:44:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:05,978 INFO L470 AbstractCegarLoop]: Abstraction has 7130 states and 21632 transitions. [2021-08-06 15:44:05,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7130 states and 21632 transitions. [2021-08-06 15:44:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:44:05,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:05,987 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:06,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:06,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:06,188 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash -923010665, now seen corresponding path program 22 times [2021-08-06 15:44:06,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:06,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545980242] [2021-08-06 15:44:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:06,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:06,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:06,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545980242] [2021-08-06 15:44:06,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545980242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:06,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468276378] [2021-08-06 15:44:06,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:44:06,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:06,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:06,985 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 15:44:06,986 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 15:44:14,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:44:14,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:44:14,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:14,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:44:15,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:44:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:15,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468276378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:15,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:15,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:44:15,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288725438] [2021-08-06 15:44:15,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:44:15,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:44:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:44:15,973 INFO L87 Difference]: Start difference. First operand 7130 states and 21632 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:17,499 INFO L93 Difference]: Finished difference Result 9323 states and 28024 transitions. [2021-08-06 15:44:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:44:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:44:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:17,516 INFO L225 Difference]: With dead ends: 9323 [2021-08-06 15:44:17,516 INFO L226 Difference]: Without dead ends: 9270 [2021-08-06 15:44:17,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1702.1ms TimeCoverageRelationStatistics Valid=279, Invalid=3381, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:44:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-08-06 15:44:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 7116. [2021-08-06 15:44:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7115 states have (on average 3.0359803232607168) internal successors, (21601), 7115 states have internal predecessors, (21601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 21601 transitions. [2021-08-06 15:44:17,627 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 21601 transitions. Word has length 48 [2021-08-06 15:44:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:17,627 INFO L470 AbstractCegarLoop]: Abstraction has 7116 states and 21601 transitions. [2021-08-06 15:44:17,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 21601 transitions. [2021-08-06 15:44:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:44:17,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:17,636 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:17,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 15:44:17,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:17,837 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1950075915, now seen corresponding path program 23 times [2021-08-06 15:44:17,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:17,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998855889] [2021-08-06 15:44:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:17,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:18,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:18,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998855889] [2021-08-06 15:44:18,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998855889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:18,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660832125] [2021-08-06 15:44:18,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:44:18,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:18,673 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:18,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 15:44:26,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:44:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 15:44:26,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:44:26,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:44:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:27,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660832125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:27,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:27,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:44:27,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042417704] [2021-08-06 15:44:27,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:44:27,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:27,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:44:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:44:27,694 INFO L87 Difference]: Start difference. First operand 7116 states and 21601 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:29,349 INFO L93 Difference]: Finished difference Result 9351 states and 28079 transitions. [2021-08-06 15:44:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:44:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:44:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:29,366 INFO L225 Difference]: With dead ends: 9351 [2021-08-06 15:44:29,366 INFO L226 Difference]: Without dead ends: 9316 [2021-08-06 15:44:29,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1661.6ms TimeCoverageRelationStatistics Valid=279, Invalid=3381, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:44:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-08-06 15:44:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7120. [2021-08-06 15:44:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.035257760921478) internal successors, (21608), 7119 states have internal predecessors, (21608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 21608 transitions. [2021-08-06 15:44:29,552 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 21608 transitions. Word has length 48 [2021-08-06 15:44:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:29,553 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 21608 transitions. [2021-08-06 15:44:29,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 21608 transitions. [2021-08-06 15:44:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:44:29,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:29,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:29,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:29,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 15:44:29,763 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1468708917, now seen corresponding path program 24 times [2021-08-06 15:44:29,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:29,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217744990] [2021-08-06 15:44:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:29,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:30,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:30,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217744990] [2021-08-06 15:44:30,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217744990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:30,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643160089] [2021-08-06 15:44:30,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:44:30,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:30,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:30,589 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:30,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 15:44:38,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:44:38,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:38,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:44:38,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:38,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:44:38,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 15:44:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:39,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643160089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:39,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:39,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:44:39,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658971083] [2021-08-06 15:44:39,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:44:39,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:39,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:44:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:44:39,811 INFO L87 Difference]: Start difference. First operand 7120 states and 21608 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:41,643 INFO L93 Difference]: Finished difference Result 8079 states and 24472 transitions. [2021-08-06 15:44:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:44:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:44:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:41,656 INFO L225 Difference]: With dead ends: 8079 [2021-08-06 15:44:41,656 INFO L226 Difference]: Without dead ends: 8027 [2021-08-06 15:44:41,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1907.8ms TimeCoverageRelationStatistics Valid=343, Invalid=3689, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:44:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-08-06 15:44:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 7108. [2021-08-06 15:44:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 7107 states have (on average 3.0372871816518927) internal successors, (21586), 7107 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 21586 transitions. [2021-08-06 15:44:41,765 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 21586 transitions. Word has length 48 [2021-08-06 15:44:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:41,765 INFO L470 AbstractCegarLoop]: Abstraction has 7108 states and 21586 transitions. [2021-08-06 15:44:41,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 21586 transitions. [2021-08-06 15:44:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:44:41,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:41,774 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:41,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 15:44:41,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 15:44:41,974 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1340281267, now seen corresponding path program 25 times [2021-08-06 15:44:41,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:41,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839013701] [2021-08-06 15:44:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:41,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:42,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:42,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839013701] [2021-08-06 15:44:42,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839013701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:42,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897489038] [2021-08-06 15:44:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:44:42,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:42,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:42,709 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:42,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 15:44:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:44:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:50,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:44:51,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 15:44:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:51,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897489038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:51,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:51,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-06 15:44:51,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17582084] [2021-08-06 15:44:51,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-06 15:44:51,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-06 15:44:51,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:44:51,985 INFO L87 Difference]: Start difference. First operand 7108 states and 21586 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:53,780 INFO L93 Difference]: Finished difference Result 8114 states and 24544 transitions. [2021-08-06 15:44:53,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:44:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 15:44:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:53,794 INFO L225 Difference]: With dead ends: 8114 [2021-08-06 15:44:53,794 INFO L226 Difference]: Without dead ends: 8074 [2021-08-06 15:44:53,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1940.6ms TimeCoverageRelationStatistics Valid=321, Invalid=3585, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:44:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-08-06 15:44:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7114. [2021-08-06 15:44:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 7113 states have (on average 3.0365527906649796) internal successors, (21599), 7113 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 21599 transitions. [2021-08-06 15:44:53,889 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 21599 transitions. Word has length 48 [2021-08-06 15:44:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:53,889 INFO L470 AbstractCegarLoop]: Abstraction has 7114 states and 21599 transitions. [2021-08-06 15:44:53,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 21599 transitions. [2021-08-06 15:44:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 15:44:53,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:53,898 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:44:53,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:54,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 15:44:54,099 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1288287443, now seen corresponding path program 26 times [2021-08-06 15:44:54,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:54,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377646326] [2021-08-06 15:44:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:54,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:54,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:54,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377646326] [2021-08-06 15:44:54,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377646326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:54,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712102762] [2021-08-06 15:44:54,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:44:54,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:54,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:54,916 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:54,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 15:44:56,896 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:44:56,896 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:44:57,910 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:44:57,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:57,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:58,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 15:44:58,111 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. [2021-08-06 15:44:58,112 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:44:58,112 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:44:58,113 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:44:58,117 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:44:58,117 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:44:58,118 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:44:58 BasicIcfg [2021-08-06 15:44:58,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:44:58,119 INFO L168 Benchmark]: Toolchain (without parser) took 689561.07 ms. Allocated memory was 230.7 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 210.2 MB in the beginning and 367.3 MB in the end (delta: -157.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-06 15:44:58,119 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 230.7 MB. Free memory is still 211.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:44:58,119 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.28 ms. Allocated memory is still 230.7 MB. Free memory was 210.1 MB in the beginning and 208.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:44:58,119 INFO L168 Benchmark]: Boogie Preprocessor took 25.42 ms. Allocated memory is still 230.7 MB. Free memory was 208.6 MB in the beginning and 207.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:44:58,119 INFO L168 Benchmark]: RCFGBuilder took 327.11 ms. Allocated memory is still 230.7 MB. Free memory was 207.4 MB in the beginning and 190.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-08-06 15:44:58,119 INFO L168 Benchmark]: TraceAbstraction took 689169.95 ms. Allocated memory was 230.7 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 190.0 MB in the beginning and 367.3 MB in the end (delta: -177.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-06 15:44:58,119 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 0.11 ms. Allocated memory is still 230.7 MB. Free memory is still 211.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.28 ms. Allocated memory is still 230.7 MB. Free memory was 210.1 MB in the beginning and 208.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.42 ms. Allocated memory is still 230.7 MB. Free memory was 208.6 MB in the beginning and 207.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 327.11 ms. Allocated memory is still 230.7 MB. Free memory was 207.4 MB in the beginning and 190.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 689169.95 ms. Allocated memory was 230.7 MB in the beginning and 2.4 GB in the end (delta: 2.2 GB). Free memory was 190.0 MB in the beginning and 367.3 MB in the end (delta: -177.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 689032.0ms, OverallIterations: 116, TraceHistogramMax: 2, EmptinessCheckTime: 507.1ms, AutomataDifference: 99861.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 91.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16975 SDtfs, 26780 SDslu, 171428 SDs, 0 SdLazy, 91405 SolverSat, 2857 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35428.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6892 GetRequests, 2846 SyntacticMatches, 129 SemanticMatches, 3917 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43933 ImplicationChecksByTransitivity, 96671.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7182occurred in iteration=99, InterpolantAutomatonStates: 2770, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5469.2ms AutomataMinimizationTime, 115 MinimizatonAttempts, 103281 StatesRemovedByMinimization, 111 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 623.0ms SsaConstructionTime, 2168.2ms SatisfiabilityAnalysisTime, 144368.5ms InterpolantComputationTime, 8177 NumberOfCodeBlocks, 8177 NumberOfCodeBlocksAsserted, 331 NumberOfCheckSat, 7951 ConstructedInterpolants, 0 QuantifiedInterpolants, 149125 SizeOfPredicates, 1060 NumberOfNonLiveVariables, 10299 ConjunctsInSsa, 2943 ConjunctsInUnsatCore, 226 InterpolantComputations, 5 PerfectInterpolantSequences, 72/1136 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