/usr/bin/java -Xmx16000000000 -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/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:54:45,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:54:45,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:54:45,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 05:54:46,024 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 [2022-01-18 05:54:46,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:54:46,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:54:46,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:54:46,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:54:46,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:54:46,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:54:46,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:54:46,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:54:46,044 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:54:46,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:54:46,044 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:54:46,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:54:46,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:54:46,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:54:46,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:54:46,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:54:46,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:54:46,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:54:46,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:54:46,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:54:46,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:54:46,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:54:46,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:54:46,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:54:46,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:54:46,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:54:46,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:54:46,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:54:46,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:54:46,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:54:46,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:54:46,047 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:54:46,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:54:46,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:54:46,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:54:46,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:54:46,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:54:46,315 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:54:46,317 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:54:46,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2022-01-18 05:54:46,318 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2022-01-18 05:54:46,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:54:46,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:54:46,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:54:46,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:54:46,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:54:46,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,365 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:54:46,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:54:46,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:54:46,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:54:46,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:54:46,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:54:46,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:54:46,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:54:46,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:54:46,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/1) ... [2022-01-18 05:54:46,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:54:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:46,420 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) [2022-01-18 05:54:46,432 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 [2022-01-18 05:54:46,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:54:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:54:46,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:54:46,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:54:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:54:46,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:54:46,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:54:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:54:46,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:54:46,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 05:54:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 05:54:46,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 05:54:46,454 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 05:54:46,492 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:54:46,494 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:54:46,617 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:54:46,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:54:46,630 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 05:54:46,631 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:54:46 BoogieIcfgContainer [2022-01-18 05:54:46,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:54:46,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:54:46,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:54:46,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:54:46,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:54:46" (1/2) ... [2022-01-18 05:54:46,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d714e9a and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:54:46, skipping insertion in model container [2022-01-18 05:54:46,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:54:46" (2/2) ... [2022-01-18 05:54:46,640 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2022-01-18 05:54:46,647 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:54:46,648 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:54:46,648 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:54:46,648 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:54:46,714 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 05:54:46,786 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:54:46,794 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, mAutomataTypeConcurrency=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 [2022-01-18 05:54:46,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 05:54:46,805 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-01-18 05:54:46,853 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 05:54:46,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:46,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:46,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1698272252, now seen corresponding path program 1 times [2022-01-18 05:54:46,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:46,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267346205] [2022-01-18 05:54:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:46,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:47,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267346205] [2022-01-18 05:54:47,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267346205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:54:47,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:54:47,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 05:54:47,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077256077] [2022-01-18 05:54:47,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:47,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 05:54:47,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 05:54:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:54:47,048 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:47,089 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2022-01-18 05:54:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 05:54:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 05:54:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:47,102 INFO L225 Difference]: With dead ends: 214 [2022-01-18 05:54:47,102 INFO L226 Difference]: Without dead ends: 199 [2022-01-18 05:54:47,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 05:54:47,106 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:47,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-18 05:54:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2022-01-18 05:54:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2022-01-18 05:54:47,179 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2022-01-18 05:54:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:47,180 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2022-01-18 05:54:47,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2022-01-18 05:54:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:54:47,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:47,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:47,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:54:47,183 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1717701342, now seen corresponding path program 1 times [2022-01-18 05:54:47,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323533719] [2022-01-18 05:54:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:47,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:47,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323533719] [2022-01-18 05:54:47,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323533719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621978573] [2022-01-18 05:54:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:47,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:47,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:47,247 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) [2022-01-18 05:54:47,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 05:54:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 05:54:47,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:47,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:47,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621978573] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:47,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 05:54:47,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-01-18 05:54:47,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925217332] [2022-01-18 05:54:47,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:47,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:54:47,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:47,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:54:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:47,493 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:47,580 INFO L93 Difference]: Finished difference Result 284 states and 788 transitions. [2022-01-18 05:54:47,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:54:47,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:54:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:47,587 INFO L225 Difference]: With dead ends: 284 [2022-01-18 05:54:47,587 INFO L226 Difference]: Without dead ends: 284 [2022-01-18 05:54:47,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:47,590 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:47,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-18 05:54:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 176. [2022-01-18 05:54:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0114285714285716) internal successors, (527), 175 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 527 transitions. [2022-01-18 05:54:47,620 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 527 transitions. Word has length 17 [2022-01-18 05:54:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:47,620 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 527 transitions. [2022-01-18 05:54:47,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 527 transitions. [2022-01-18 05:54:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:54:47,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:47,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:47,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:47,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:47,844 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1520327836, now seen corresponding path program 1 times [2022-01-18 05:54:47,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:47,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138552972] [2022-01-18 05:54:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:47,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:47,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:47,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138552972] [2022-01-18 05:54:47,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138552972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:54:47,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:54:47,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:54:47,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33592639] [2022-01-18 05:54:47,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:47,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:54:47,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:54:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:54:47,898 INFO L87 Difference]: Start difference. First operand 176 states and 527 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:47,954 INFO L93 Difference]: Finished difference Result 240 states and 691 transitions. [2022-01-18 05:54:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:54:47,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:54:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:47,957 INFO L225 Difference]: With dead ends: 240 [2022-01-18 05:54:47,957 INFO L226 Difference]: Without dead ends: 240 [2022-01-18 05:54:47,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:54:47,958 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:47,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-18 05:54:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 191. [2022-01-18 05:54:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.0) internal successors, (570), 190 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 570 transitions. [2022-01-18 05:54:47,970 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 570 transitions. Word has length 17 [2022-01-18 05:54:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:47,970 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 570 transitions. [2022-01-18 05:54:47,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 570 transitions. [2022-01-18 05:54:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:54:47,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:47,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:47,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 05:54:47,973 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 721287832, now seen corresponding path program 2 times [2022-01-18 05:54:47,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:47,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036335582] [2022-01-18 05:54:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:47,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036335582] [2022-01-18 05:54:48,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036335582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:54:48,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:54:48,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:54:48,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348586182] [2022-01-18 05:54:48,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:48,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:54:48,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:54:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:54:48,015 INFO L87 Difference]: Start difference. First operand 191 states and 570 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:48,064 INFO L93 Difference]: Finished difference Result 312 states and 867 transitions. [2022-01-18 05:54:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:54:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:54:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:48,066 INFO L225 Difference]: With dead ends: 312 [2022-01-18 05:54:48,067 INFO L226 Difference]: Without dead ends: 312 [2022-01-18 05:54:48,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:54:48,068 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:48,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-18 05:54:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2022-01-18 05:54:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9763313609467454) internal successors, (503), 169 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 503 transitions. [2022-01-18 05:54:48,077 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 503 transitions. Word has length 17 [2022-01-18 05:54:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:48,078 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 503 transitions. [2022-01-18 05:54:48,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 503 transitions. [2022-01-18 05:54:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:54:48,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:48,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:48,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 05:54:48,080 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash 388922714, now seen corresponding path program 1 times [2022-01-18 05:54:48,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:48,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188295562] [2022-01-18 05:54:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:48,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:48,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188295562] [2022-01-18 05:54:48,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188295562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:54:48,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:54:48,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:54:48,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343812412] [2022-01-18 05:54:48,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:48,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:54:48,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:48,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:54:48,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:54:48,110 INFO L87 Difference]: Start difference. First operand 170 states and 503 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:48,164 INFO L93 Difference]: Finished difference Result 192 states and 530 transitions. [2022-01-18 05:54:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:54:48,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:54:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:48,166 INFO L225 Difference]: With dead ends: 192 [2022-01-18 05:54:48,166 INFO L226 Difference]: Without dead ends: 162 [2022-01-18 05:54:48,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:54:48,167 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:48,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-18 05:54:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2022-01-18 05:54:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.9324324324324325) internal successors, (434), 148 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 434 transitions. [2022-01-18 05:54:48,174 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 434 transitions. Word has length 17 [2022-01-18 05:54:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:48,174 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 434 transitions. [2022-01-18 05:54:48,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 434 transitions. [2022-01-18 05:54:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 05:54:48,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:48,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:48,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 05:54:48,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:48,177 INFO L85 PathProgramCache]: Analyzing trace with hash 336279062, now seen corresponding path program 2 times [2022-01-18 05:54:48,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:48,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709608148] [2022-01-18 05:54:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:48,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709608148] [2022-01-18 05:54:48,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709608148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299853333] [2022-01-18 05:54:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:54:48,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:48,240 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) [2022-01-18 05:54:48,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 05:54:48,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:54:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 05:54:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299853333] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:48,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 05:54:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-01-18 05:54:48,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977654853] [2022-01-18 05:54:48,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:48,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:54:48,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:54:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:54:48,426 INFO L87 Difference]: Start difference. First operand 149 states and 434 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:48,474 INFO L93 Difference]: Finished difference Result 245 states and 688 transitions. [2022-01-18 05:54:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:54:48,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 05:54:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:48,476 INFO L225 Difference]: With dead ends: 245 [2022-01-18 05:54:48,476 INFO L226 Difference]: Without dead ends: 245 [2022-01-18 05:54:48,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:54:48,477 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:48,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-18 05:54:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-01-18 05:54:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.9375) internal successors, (470), 160 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 470 transitions. [2022-01-18 05:54:48,484 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 470 transitions. Word has length 17 [2022-01-18 05:54:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:48,485 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 470 transitions. [2022-01-18 05:54:48,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 470 transitions. [2022-01-18 05:54:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:54:48,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:48,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:48,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 05:54:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 05:54:48,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1880409020, now seen corresponding path program 1 times [2022-01-18 05:54:48,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:48,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497173168] [2022-01-18 05:54:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:48,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:48,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497173168] [2022-01-18 05:54:48,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497173168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971551228] [2022-01-18 05:54:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:48,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:48,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:48,779 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) [2022-01-18 05:54:48,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 05:54:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:54:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:48,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971551228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:48,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:48,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 05:54:48,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733771968] [2022-01-18 05:54:48,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:48,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:54:48,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:54:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:48,938 INFO L87 Difference]: Start difference. First operand 161 states and 470 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:49,124 INFO L93 Difference]: Finished difference Result 404 states and 1123 transitions. [2022-01-18 05:54:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:54:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:54:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:49,127 INFO L225 Difference]: With dead ends: 404 [2022-01-18 05:54:49,128 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 05:54:49,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:54:49,129 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:49,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 70 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 05:54:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 234. [2022-01-18 05:54:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.9871244635193133) internal successors, (696), 233 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 696 transitions. [2022-01-18 05:54:49,141 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 696 transitions. Word has length 19 [2022-01-18 05:54:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:49,141 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 696 transitions. [2022-01-18 05:54:49,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 696 transitions. [2022-01-18 05:54:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:54:49,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:49,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:49,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 05:54:49,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:49,357 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash 34046910, now seen corresponding path program 1 times [2022-01-18 05:54:49,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:49,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128890489] [2022-01-18 05:54:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:49,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:49,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:49,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128890489] [2022-01-18 05:54:49,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128890489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229898763] [2022-01-18 05:54:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:49,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:49,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:49,478 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) [2022-01-18 05:54:49,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 05:54:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:54:49,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:54:49,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:54:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229898763] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:49,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:49,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 05:54:49,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742835640] [2022-01-18 05:54:49,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:49,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:54:49,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:54:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:54:49,735 INFO L87 Difference]: Start difference. First operand 234 states and 696 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:49,879 INFO L93 Difference]: Finished difference Result 445 states and 1311 transitions. [2022-01-18 05:54:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:54:49,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:54:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:49,883 INFO L225 Difference]: With dead ends: 445 [2022-01-18 05:54:49,883 INFO L226 Difference]: Without dead ends: 412 [2022-01-18 05:54:49,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:54:49,884 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:49,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-18 05:54:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 328. [2022-01-18 05:54:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.0611620795107033) internal successors, (1001), 327 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1001 transitions. [2022-01-18 05:54:49,895 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1001 transitions. Word has length 19 [2022-01-18 05:54:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:49,895 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1001 transitions. [2022-01-18 05:54:49,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1001 transitions. [2022-01-18 05:54:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:54:49,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:49,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:49,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:50,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -846392150, now seen corresponding path program 2 times [2022-01-18 05:54:50,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861794010] [2022-01-18 05:54:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:50,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:50,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:50,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861794010] [2022-01-18 05:54:50,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861794010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:50,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936041090] [2022-01-18 05:54:50,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:54:50,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:50,174 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) [2022-01-18 05:54:50,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:54:50,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:54:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:54:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:54:50,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:54:50,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936041090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:50,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:50,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 05:54:50,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791628505] [2022-01-18 05:54:50,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:50,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:54:50,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:54:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:50,338 INFO L87 Difference]: Start difference. First operand 328 states and 1001 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:50,396 INFO L93 Difference]: Finished difference Result 646 states and 1931 transitions. [2022-01-18 05:54:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:54:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:54:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:50,399 INFO L225 Difference]: With dead ends: 646 [2022-01-18 05:54:50,400 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 05:54:50,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:50,400 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:50,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 113 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 05:54:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 390. [2022-01-18 05:54:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.16452442159383) internal successors, (1231), 389 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1231 transitions. [2022-01-18 05:54:50,415 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1231 transitions. Word has length 19 [2022-01-18 05:54:50,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:50,416 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1231 transitions. [2022-01-18 05:54:50,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1231 transitions. [2022-01-18 05:54:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:54:50,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:50,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:50,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:50,640 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1555602956, now seen corresponding path program 3 times [2022-01-18 05:54:50,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:50,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130320718] [2022-01-18 05:54:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:50,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:50,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130320718] [2022-01-18 05:54:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130320718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120715039] [2022-01-18 05:54:50,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:54:50,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:50,738 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) [2022-01-18 05:54:50,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:54:50,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:54:50,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:50,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:54:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:50,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:50,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120715039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:50,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:50,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 05:54:50,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531303724] [2022-01-18 05:54:50,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:50,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:54:50,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:54:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:54:50,898 INFO L87 Difference]: Start difference. First operand 390 states and 1231 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:51,072 INFO L93 Difference]: Finished difference Result 816 states and 2463 transitions. [2022-01-18 05:54:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:54:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:54:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:51,077 INFO L225 Difference]: With dead ends: 816 [2022-01-18 05:54:51,077 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 05:54:51,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:54:51,078 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:51,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 05:54:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 465. [2022-01-18 05:54:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.2349137931034484) internal successors, (1501), 464 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1501 transitions. [2022-01-18 05:54:51,095 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1501 transitions. Word has length 19 [2022-01-18 05:54:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:51,095 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1501 transitions. [2022-01-18 05:54:51,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1501 transitions. [2022-01-18 05:54:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:54:51,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:51,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:51,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:51,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:51,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:51,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1118825264, now seen corresponding path program 2 times [2022-01-18 05:54:51,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:51,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019866643] [2022-01-18 05:54:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:51,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:51,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:51,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019866643] [2022-01-18 05:54:51,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019866643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:51,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371563651] [2022-01-18 05:54:51,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:54:51,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:51,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:51,352 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) [2022-01-18 05:54:51,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:54:51,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:54:51,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:51,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:54:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:51,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:51,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371563651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:51,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:51,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-18 05:54:51,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123161852] [2022-01-18 05:54:51,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:51,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:54:51,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:54:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:51,486 INFO L87 Difference]: Start difference. First operand 465 states and 1501 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:51,674 INFO L93 Difference]: Finished difference Result 1402 states and 4444 transitions. [2022-01-18 05:54:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:54:51,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:54:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:51,683 INFO L225 Difference]: With dead ends: 1402 [2022-01-18 05:54:51,684 INFO L226 Difference]: Without dead ends: 1402 [2022-01-18 05:54:51,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:54:51,685 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:51,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-01-18 05:54:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 797. [2022-01-18 05:54:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4032663316582914) internal successors, (2709), 796 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2709 transitions. [2022-01-18 05:54:51,714 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2709 transitions. Word has length 19 [2022-01-18 05:54:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2709 transitions. [2022-01-18 05:54:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2709 transitions. [2022-01-18 05:54:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 05:54:51,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:51,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:51,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:51,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:51,940 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:51,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1604629368, now seen corresponding path program 3 times [2022-01-18 05:54:51,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:51,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156895182] [2022-01-18 05:54:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:51,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:51,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:51,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156895182] [2022-01-18 05:54:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156895182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:51,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494802308] [2022-01-18 05:54:51,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:54:51,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:51,978 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) [2022-01-18 05:54:51,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:54:52,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:54:52,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:54:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:52,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:52,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494802308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:52,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:52,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-18 05:54:52,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961482467] [2022-01-18 05:54:52,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:52,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 05:54:52,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 05:54:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:52,094 INFO L87 Difference]: Start difference. First operand 797 states and 2709 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:52,215 INFO L93 Difference]: Finished difference Result 1152 states and 3746 transitions. [2022-01-18 05:54:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:54:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 05:54:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:52,222 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 05:54:52,222 INFO L226 Difference]: Without dead ends: 1140 [2022-01-18 05:54:52,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:54:52,223 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:52,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 21 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-18 05:54:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 653. [2022-01-18 05:54:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.585889570552147) internal successors, (2338), 652 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2338 transitions. [2022-01-18 05:54:52,254 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2338 transitions. Word has length 19 [2022-01-18 05:54:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:52,254 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 2338 transitions. [2022-01-18 05:54:52,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2338 transitions. [2022-01-18 05:54:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:52,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:52,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:52,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-18 05:54:52,481 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,SelfDestructingSolverStorable11 [2022-01-18 05:54:52,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:52,482 INFO L85 PathProgramCache]: Analyzing trace with hash -671302374, now seen corresponding path program 4 times [2022-01-18 05:54:52,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:52,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655838678] [2022-01-18 05:54:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:52,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:52,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:52,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655838678] [2022-01-18 05:54:52,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655838678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:52,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937870382] [2022-01-18 05:54:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:54:52,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:52,560 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) [2022-01-18 05:54:52,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:54:52,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:54:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:54:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:52,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:52,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937870382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:52,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:52,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-01-18 05:54:52,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672257879] [2022-01-18 05:54:52,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:52,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:54:52,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:52,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:54:52,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:54:52,732 INFO L87 Difference]: Start difference. First operand 653 states and 2338 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:52,824 INFO L93 Difference]: Finished difference Result 1011 states and 3340 transitions. [2022-01-18 05:54:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:54:52,824 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:52,830 INFO L225 Difference]: With dead ends: 1011 [2022-01-18 05:54:52,830 INFO L226 Difference]: Without dead ends: 990 [2022-01-18 05:54:52,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:54:52,831 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:52,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 170 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-18 05:54:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 730. [2022-01-18 05:54:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.5486968449931413) internal successors, (2587), 729 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2587 transitions. [2022-01-18 05:54:52,859 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2587 transitions. Word has length 21 [2022-01-18 05:54:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:52,860 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2587 transitions. [2022-01-18 05:54:52,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2587 transitions. [2022-01-18 05:54:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:52,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:52,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:52,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:53,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 05:54:53,083 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1112056780, now seen corresponding path program 5 times [2022-01-18 05:54:53,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:53,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478229178] [2022-01-18 05:54:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:53,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:53,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478229178] [2022-01-18 05:54:53,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478229178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033096011] [2022-01-18 05:54:53,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:54:53,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:53,155 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) [2022-01-18 05:54:53,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:54:53,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:54:53,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:54:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:53,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:53,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033096011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:53,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:53,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 05:54:53,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627693620] [2022-01-18 05:54:53,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:53,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:54:53,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:53,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:54:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:54:53,361 INFO L87 Difference]: Start difference. First operand 730 states and 2587 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:53,504 INFO L93 Difference]: Finished difference Result 1051 states and 3509 transitions. [2022-01-18 05:54:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:54:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:53,510 INFO L225 Difference]: With dead ends: 1051 [2022-01-18 05:54:53,510 INFO L226 Difference]: Without dead ends: 1030 [2022-01-18 05:54:53,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:54:53,511 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:53,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 135 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-18 05:54:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 779. [2022-01-18 05:54:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.575835475578406) internal successors, (2782), 778 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2782 transitions. [2022-01-18 05:54:53,534 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2782 transitions. Word has length 21 [2022-01-18 05:54:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:53,535 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2782 transitions. [2022-01-18 05:54:53,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2782 transitions. [2022-01-18 05:54:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:53,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:53,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:53,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:53,759 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,SelfDestructingSolverStorable13 [2022-01-18 05:54:53,760 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash 190269072, now seen corresponding path program 6 times [2022-01-18 05:54:53,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:53,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681243491] [2022-01-18 05:54:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:53,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:53,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:53,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681243491] [2022-01-18 05:54:53,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681243491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:53,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671544018] [2022-01-18 05:54:53,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:54:53,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:53,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:53,834 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) [2022-01-18 05:54:53,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:54:53,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:54:53,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:54:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:54:53,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:54:54,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671544018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:54,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:54,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-18 05:54:54,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993440629] [2022-01-18 05:54:54,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:54,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:54:54,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:54:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:54:54,083 INFO L87 Difference]: Start difference. First operand 779 states and 2782 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:54,256 INFO L93 Difference]: Finished difference Result 912 states and 3156 transitions. [2022-01-18 05:54:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:54:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:54,262 INFO L225 Difference]: With dead ends: 912 [2022-01-18 05:54:54,262 INFO L226 Difference]: Without dead ends: 885 [2022-01-18 05:54:54,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:54:54,263 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:54,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 178 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-18 05:54:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 798. [2022-01-18 05:54:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.5809284818067755) internal successors, (2854), 797 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2854 transitions. [2022-01-18 05:54:54,286 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2854 transitions. Word has length 21 [2022-01-18 05:54:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2854 transitions. [2022-01-18 05:54:54,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2854 transitions. [2022-01-18 05:54:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:54,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:54,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:54,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:54,505 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,SelfDestructingSolverStorable14 [2022-01-18 05:54:54,505 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1942186592, now seen corresponding path program 4 times [2022-01-18 05:54:54,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:54,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846782192] [2022-01-18 05:54:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:54,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:54,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846782192] [2022-01-18 05:54:54,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846782192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281176002] [2022-01-18 05:54:54,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:54:54,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:54,534 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) [2022-01-18 05:54:54,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:54:54,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:54:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:54:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:54,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 05:54:54,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281176002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:54:54,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 05:54:54,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-01-18 05:54:54,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594389873] [2022-01-18 05:54:54,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:54,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:54:54,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:54:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:54:54,606 INFO L87 Difference]: Start difference. First operand 798 states and 2854 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:54,670 INFO L93 Difference]: Finished difference Result 1037 states and 3469 transitions. [2022-01-18 05:54:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:54:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:54,675 INFO L225 Difference]: With dead ends: 1037 [2022-01-18 05:54:54,675 INFO L226 Difference]: Without dead ends: 1005 [2022-01-18 05:54:54,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:54:54,676 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:54,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-18 05:54:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 884. [2022-01-18 05:54:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.5130237825594564) internal successors, (3102), 883 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3102 transitions. [2022-01-18 05:54:54,701 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3102 transitions. Word has length 21 [2022-01-18 05:54:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:54,702 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 3102 transitions. [2022-01-18 05:54:54,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3102 transitions. [2022-01-18 05:54:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:54,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:54,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:54,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:54,927 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,SelfDestructingSolverStorable15 [2022-01-18 05:54:54,927 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 57075100, now seen corresponding path program 5 times [2022-01-18 05:54:54,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453783995] [2022-01-18 05:54:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:54,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:54:54,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:54,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453783995] [2022-01-18 05:54:54,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453783995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:54:54,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:54:54,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:54:54,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593565013] [2022-01-18 05:54:54,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:54,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:54:54,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:54:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:54:54,953 INFO L87 Difference]: Start difference. First operand 884 states and 3102 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:54,995 INFO L93 Difference]: Finished difference Result 974 states and 3311 transitions. [2022-01-18 05:54:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:54:54,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:55,000 INFO L225 Difference]: With dead ends: 974 [2022-01-18 05:54:55,000 INFO L226 Difference]: Without dead ends: 926 [2022-01-18 05:54:55,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:54:55,001 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:55,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-18 05:54:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 830. [2022-01-18 05:54:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.525934861278649) internal successors, (2923), 829 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2923 transitions. [2022-01-18 05:54:55,023 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2923 transitions. Word has length 21 [2022-01-18 05:54:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:55,024 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2923 transitions. [2022-01-18 05:54:55,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2923 transitions. [2022-01-18 05:54:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:55,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:55,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:55,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-18 05:54:55,026 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash -369540448, now seen corresponding path program 6 times [2022-01-18 05:54:55,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:55,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747619194] [2022-01-18 05:54:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:55,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:55,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:55,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747619194] [2022-01-18 05:54:55,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747619194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:55,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113003820] [2022-01-18 05:54:55,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:54:55,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:55,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:55,050 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) [2022-01-18 05:54:55,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:54:55,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:54:55,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:55,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:54:55,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:55,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:55,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113003820] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:55,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 05:54:55,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2022-01-18 05:54:55,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772539542] [2022-01-18 05:54:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:55,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:54:55,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:55,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:54:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:55,189 INFO L87 Difference]: Start difference. First operand 830 states and 2923 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:55,228 INFO L93 Difference]: Finished difference Result 870 states and 3033 transitions. [2022-01-18 05:54:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:54:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:55,233 INFO L225 Difference]: With dead ends: 870 [2022-01-18 05:54:55,233 INFO L226 Difference]: Without dead ends: 857 [2022-01-18 05:54:55,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:55,234 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:55,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:54:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-18 05:54:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 804. [2022-01-18 05:54:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.5454545454545454) internal successors, (2847), 803 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2847 transitions. [2022-01-18 05:54:55,255 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2847 transitions. Word has length 21 [2022-01-18 05:54:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:55,255 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2847 transitions. [2022-01-18 05:54:55,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2847 transitions. [2022-01-18 05:54:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:55,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:55,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:55,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:55,471 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,SelfDestructingSolverStorable17 [2022-01-18 05:54:55,471 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1428493028, now seen corresponding path program 7 times [2022-01-18 05:54:55,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475537453] [2022-01-18 05:54:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:55,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:55,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:55,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475537453] [2022-01-18 05:54:55,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475537453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:55,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517894186] [2022-01-18 05:54:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:54:55,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:55,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:55,496 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) [2022-01-18 05:54:55,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:54:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:54:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:55,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 05:54:55,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517894186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:54:55,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 05:54:55,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-01-18 05:54:55,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855963117] [2022-01-18 05:54:55,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:54:55,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:54:55,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:55,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:54:55,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:54:55,571 INFO L87 Difference]: Start difference. First operand 804 states and 2847 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:55,649 INFO L93 Difference]: Finished difference Result 1221 states and 4056 transitions. [2022-01-18 05:54:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 05:54:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:55,655 INFO L225 Difference]: With dead ends: 1221 [2022-01-18 05:54:55,655 INFO L226 Difference]: Without dead ends: 1201 [2022-01-18 05:54:55,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:54:55,656 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:55,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-18 05:54:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 904. [2022-01-18 05:54:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.5957918050941307) internal successors, (3247), 903 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3247 transitions. [2022-01-18 05:54:55,686 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3247 transitions. Word has length 21 [2022-01-18 05:54:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:55,686 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 3247 transitions. [2022-01-18 05:54:55,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3247 transitions. [2022-01-18 05:54:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:55,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:55,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:55,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:55,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:55,910 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash -679790180, now seen corresponding path program 8 times [2022-01-18 05:54:55,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:55,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289655733] [2022-01-18 05:54:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:55,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:55,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289655733] [2022-01-18 05:54:55,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289655733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145082850] [2022-01-18 05:54:55,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:54:55,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:55,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:55,938 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) [2022-01-18 05:54:55,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:54:55,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:54:55,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:54:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:56,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145082850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:56,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:56,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-01-18 05:54:56,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487562890] [2022-01-18 05:54:56,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:56,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:54:56,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:56,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:54:56,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:54:56,153 INFO L87 Difference]: Start difference. First operand 904 states and 3247 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-01-18 05:54:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:56,366 INFO L93 Difference]: Finished difference Result 1454 states and 4620 transitions. [2022-01-18 05:54:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:54:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:56,374 INFO L225 Difference]: With dead ends: 1454 [2022-01-18 05:54:56,374 INFO L226 Difference]: Without dead ends: 1412 [2022-01-18 05:54:56,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:54:56,375 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:56,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-18 05:54:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 920. [2022-01-18 05:54:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.5070729053318823) internal successors, (3223), 919 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3223 transitions. [2022-01-18 05:54:56,430 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3223 transitions. Word has length 21 [2022-01-18 05:54:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:56,430 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 3223 transitions. [2022-01-18 05:54:56,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-01-18 05:54:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3223 transitions. [2022-01-18 05:54:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:56,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:56,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:56,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:56,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:56,636 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash -849904168, now seen corresponding path program 9 times [2022-01-18 05:54:56,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:56,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926021555] [2022-01-18 05:54:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:56,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:56,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:56,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926021555] [2022-01-18 05:54:56,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926021555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:56,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803550581] [2022-01-18 05:54:56,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:54:56,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:56,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:56,679 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) [2022-01-18 05:54:56,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:54:56,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:54:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:56,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:54:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:56,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:56,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803550581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:56,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:56,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-18 05:54:56,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030436708] [2022-01-18 05:54:56,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:56,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:54:56,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:56,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:54:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:54:56,871 INFO L87 Difference]: Start difference. First operand 920 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:57,064 INFO L93 Difference]: Finished difference Result 1679 states and 5671 transitions. [2022-01-18 05:54:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:54:57,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:57,070 INFO L225 Difference]: With dead ends: 1679 [2022-01-18 05:54:57,071 INFO L226 Difference]: Without dead ends: 1653 [2022-01-18 05:54:57,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:54:57,071 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:57,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 46 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-01-18 05:54:57,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1158. [2022-01-18 05:54:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.5419187554019014) internal successors, (4098), 1157 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 4098 transitions. [2022-01-18 05:54:57,104 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 4098 transitions. Word has length 21 [2022-01-18 05:54:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:57,104 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 4098 transitions. [2022-01-18 05:54:57,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 4098 transitions. [2022-01-18 05:54:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:57,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:57,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:57,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-18 05:54:57,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:57,329 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1595463124, now seen corresponding path program 10 times [2022-01-18 05:54:57,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:57,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831507163] [2022-01-18 05:54:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:57,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:57,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:57,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831507163] [2022-01-18 05:54:57,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831507163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:57,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509504214] [2022-01-18 05:54:57,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:54:57,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:57,378 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) [2022-01-18 05:54:57,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 05:54:57,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:54:57,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:57,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:54:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:57,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:57,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509504214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:57,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:57,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-18 05:54:57,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003448584] [2022-01-18 05:54:57,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:57,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:54:57,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:57,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:54:57,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:54:57,590 INFO L87 Difference]: Start difference. First operand 1158 states and 4098 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:57,791 INFO L93 Difference]: Finished difference Result 2209 states and 7293 transitions. [2022-01-18 05:54:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:54:57,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:57,799 INFO L225 Difference]: With dead ends: 2209 [2022-01-18 05:54:57,799 INFO L226 Difference]: Without dead ends: 2209 [2022-01-18 05:54:57,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:54:57,800 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:57,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 103 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-01-18 05:54:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1285. [2022-01-18 05:54:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.5856697819314642) internal successors, (4604), 1284 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4604 transitions. [2022-01-18 05:54:57,839 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4604 transitions. Word has length 21 [2022-01-18 05:54:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:57,839 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 4604 transitions. [2022-01-18 05:54:57,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4604 transitions. [2022-01-18 05:54:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:57,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:57,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:57,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:58,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:58,059 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1594229548, now seen corresponding path program 11 times [2022-01-18 05:54:58,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369407505] [2022-01-18 05:54:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:58,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:58,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:58,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369407505] [2022-01-18 05:54:58,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369407505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:58,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891301364] [2022-01-18 05:54:58,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:54:58,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:58,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:58,089 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) [2022-01-18 05:54:58,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 05:54:58,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:54:58,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:54:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:58,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:58,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891301364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:58,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:58,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-18 05:54:58,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26002902] [2022-01-18 05:54:58,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:58,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:54:58,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:58,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:54:58,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:54:58,323 INFO L87 Difference]: Start difference. First operand 1285 states and 4604 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:58,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:58,553 INFO L93 Difference]: Finished difference Result 1613 states and 5504 transitions. [2022-01-18 05:54:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:54:58,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:58,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:58,557 INFO L225 Difference]: With dead ends: 1613 [2022-01-18 05:54:58,557 INFO L226 Difference]: Without dead ends: 1581 [2022-01-18 05:54:58,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:54:58,558 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:58,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 106 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:54:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-01-18 05:54:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1273. [2022-01-18 05:54:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.5550314465408803) internal successors, (4522), 1272 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4522 transitions. [2022-01-18 05:54:58,591 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4522 transitions. Word has length 21 [2022-01-18 05:54:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:58,591 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 4522 transitions. [2022-01-18 05:54:58,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4522 transitions. [2022-01-18 05:54:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:58,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:58,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:58,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:58,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:58,817 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1935867080, now seen corresponding path program 12 times [2022-01-18 05:54:58,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:58,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758796541] [2022-01-18 05:54:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:58,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:58,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:58,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758796541] [2022-01-18 05:54:58,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758796541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:58,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296596853] [2022-01-18 05:54:58,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:54:58,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:58,845 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) [2022-01-18 05:54:58,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 05:54:58,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:54:58,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:54:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:54:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:58,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:59,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296596853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:59,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:59,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-18 05:54:59,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461467761] [2022-01-18 05:54:59,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:59,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:54:59,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:54:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:54:59,072 INFO L87 Difference]: Start difference. First operand 1273 states and 4522 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:54:59,282 INFO L93 Difference]: Finished difference Result 2164 states and 7115 transitions. [2022-01-18 05:54:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:54:59,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:54:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:54:59,287 INFO L225 Difference]: With dead ends: 2164 [2022-01-18 05:54:59,287 INFO L226 Difference]: Without dead ends: 2156 [2022-01-18 05:54:59,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:54:59,288 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:54:59,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 108 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:54:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2022-01-18 05:54:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1534. [2022-01-18 05:54:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.5851272015655575) internal successors, (5496), 1533 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5496 transitions. [2022-01-18 05:54:59,352 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5496 transitions. Word has length 21 [2022-01-18 05:54:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:54:59,353 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5496 transitions. [2022-01-18 05:54:59,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:54:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5496 transitions. [2022-01-18 05:54:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:54:59,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:54:59,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:54:59,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 05:54:59,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:59,571 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:54:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:54:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 524199368, now seen corresponding path program 13 times [2022-01-18 05:54:59,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:54:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695564785] [2022-01-18 05:54:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:54:59,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:54:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:59,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:54:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695564785] [2022-01-18 05:54:59,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695564785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:54:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76315114] [2022-01-18 05:54:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:54:59,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:54:59,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:54:59,610 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) [2022-01-18 05:54:59,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 05:54:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:54:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:54:59,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:54:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:59,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:54:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:54:59,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76315114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:54:59,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:54:59,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-01-18 05:54:59,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956328384] [2022-01-18 05:54:59,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:54:59,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:54:59,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:54:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:54:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:54:59,809 INFO L87 Difference]: Start difference. First operand 1534 states and 5496 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:00,055 INFO L93 Difference]: Finished difference Result 2841 states and 9935 transitions. [2022-01-18 05:55:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:55:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:55:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:00,065 INFO L225 Difference]: With dead ends: 2841 [2022-01-18 05:55:00,066 INFO L226 Difference]: Without dead ends: 2831 [2022-01-18 05:55:00,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:55:00,067 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:00,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 53 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-01-18 05:55:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1813. [2022-01-18 05:55:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.587748344370861) internal successors, (6501), 1812 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 6501 transitions. [2022-01-18 05:55:00,128 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 6501 transitions. Word has length 21 [2022-01-18 05:55:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:00,128 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 6501 transitions. [2022-01-18 05:55:00,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 6501 transitions. [2022-01-18 05:55:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:55:00,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:00,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:00,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:00,346 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,SelfDestructingSolverStorable24 [2022-01-18 05:55:00,347 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1808991432, now seen corresponding path program 14 times [2022-01-18 05:55:00,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:00,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297225990] [2022-01-18 05:55:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:00,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:00,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:00,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297225990] [2022-01-18 05:55:00,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297225990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:00,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697104301] [2022-01-18 05:55:00,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:55:00,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:00,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:00,375 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) [2022-01-18 05:55:00,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 05:55:00,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:55:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:55:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:00,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:00,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697104301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:00,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:00,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-18 05:55:00,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399995127] [2022-01-18 05:55:00,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:00,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:55:00,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:55:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:55:00,584 INFO L87 Difference]: Start difference. First operand 1813 states and 6501 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:00,781 INFO L93 Difference]: Finished difference Result 2259 states and 7725 transitions. [2022-01-18 05:55:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:55:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:55:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:00,788 INFO L225 Difference]: With dead ends: 2259 [2022-01-18 05:55:00,788 INFO L226 Difference]: Without dead ends: 2247 [2022-01-18 05:55:00,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:55:00,789 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:00,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 83 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:55:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-01-18 05:55:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1809. [2022-01-18 05:55:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.587942477876106) internal successors, (6487), 1808 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6487 transitions. [2022-01-18 05:55:00,832 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6487 transitions. Word has length 21 [2022-01-18 05:55:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:00,832 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 6487 transitions. [2022-01-18 05:55:00,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6487 transitions. [2022-01-18 05:55:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:55:00,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:00,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:00,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:01,049 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,SelfDestructingSolverStorable25 [2022-01-18 05:55:01,049 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1458153844, now seen corresponding path program 15 times [2022-01-18 05:55:01,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:01,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525473968] [2022-01-18 05:55:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:01,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:01,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:01,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525473968] [2022-01-18 05:55:01,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525473968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272563951] [2022-01-18 05:55:01,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:55:01,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:01,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:01,083 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) [2022-01-18 05:55:01,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 05:55:01,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:55:01,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:01,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:55:01,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:01,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:01,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272563951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:01,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:01,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-18 05:55:01,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113491427] [2022-01-18 05:55:01,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:01,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:55:01,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:55:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:55:01,241 INFO L87 Difference]: Start difference. First operand 1809 states and 6487 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:01,462 INFO L93 Difference]: Finished difference Result 3116 states and 10468 transitions. [2022-01-18 05:55:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:55:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:55:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:01,471 INFO L225 Difference]: With dead ends: 3116 [2022-01-18 05:55:01,472 INFO L226 Difference]: Without dead ends: 3116 [2022-01-18 05:55:01,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:55:01,472 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:01,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 161 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:55:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-01-18 05:55:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1975. [2022-01-18 05:55:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.569908814589666) internal successors, (7047), 1974 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 7047 transitions. [2022-01-18 05:55:01,523 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 7047 transitions. Word has length 21 [2022-01-18 05:55:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:01,523 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 7047 transitions. [2022-01-18 05:55:01,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 7047 transitions. [2022-01-18 05:55:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:55:01,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:01,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:01,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:01,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 05:55:01,747 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash -27282996, now seen corresponding path program 16 times [2022-01-18 05:55:01,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:01,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641242140] [2022-01-18 05:55:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:01,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:01,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641242140] [2022-01-18 05:55:01,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641242140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486478034] [2022-01-18 05:55:01,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:55:01,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:01,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:01,780 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) [2022-01-18 05:55:01,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 05:55:01,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:55:01,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:55:01,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:01,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:01,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486478034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:01,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:01,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-01-18 05:55:01,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574182548] [2022-01-18 05:55:01,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:01,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:55:01,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:55:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:55:01,965 INFO L87 Difference]: Start difference. First operand 1975 states and 7047 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:02,194 INFO L93 Difference]: Finished difference Result 2407 states and 8257 transitions. [2022-01-18 05:55:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:55:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:55:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:02,201 INFO L225 Difference]: With dead ends: 2407 [2022-01-18 05:55:02,201 INFO L226 Difference]: Without dead ends: 2361 [2022-01-18 05:55:02,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:55:02,202 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:02,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 73 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:55:02,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-01-18 05:55:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2032. [2022-01-18 05:55:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.539635647464303) internal successors, (7189), 2031 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7189 transitions. [2022-01-18 05:55:02,246 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7189 transitions. Word has length 21 [2022-01-18 05:55:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:02,246 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 7189 transitions. [2022-01-18 05:55:02,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7189 transitions. [2022-01-18 05:55:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:55:02,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:02,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:02,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:02,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:02,467 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash 263688078, now seen corresponding path program 7 times [2022-01-18 05:55:02,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:02,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645334384] [2022-01-18 05:55:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:02,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:02,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:02,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645334384] [2022-01-18 05:55:02,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645334384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:02,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208689959] [2022-01-18 05:55:02,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:55:02,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:02,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:02,527 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) [2022-01-18 05:55:02,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 05:55:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:02,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:55:02,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:55:02,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208689959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:02,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:02,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-18 05:55:02,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204699295] [2022-01-18 05:55:02,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:02,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:55:02,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:55:02,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:55:02,653 INFO L87 Difference]: Start difference. First operand 2032 states and 7189 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:02,771 INFO L93 Difference]: Finished difference Result 2352 states and 8100 transitions. [2022-01-18 05:55:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:55:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:55:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:02,775 INFO L225 Difference]: With dead ends: 2352 [2022-01-18 05:55:02,775 INFO L226 Difference]: Without dead ends: 2331 [2022-01-18 05:55:02,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:55:02,775 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:02,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 207 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:55:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2022-01-18 05:55:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2045. [2022-01-18 05:55:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.5484344422700587) internal successors, (7253), 2044 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7253 transitions. [2022-01-18 05:55:02,816 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7253 transitions. Word has length 21 [2022-01-18 05:55:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:02,816 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 7253 transitions. [2022-01-18 05:55:02,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7253 transitions. [2022-01-18 05:55:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:55:02,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:02,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:02,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 05:55:03,042 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,SelfDestructingSolverStorable28 [2022-01-18 05:55:03,043 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:03,043 INFO L85 PathProgramCache]: Analyzing trace with hash -658099630, now seen corresponding path program 8 times [2022-01-18 05:55:03,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:03,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445238093] [2022-01-18 05:55:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:03,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:03,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:03,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445238093] [2022-01-18 05:55:03,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445238093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:03,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528682574] [2022-01-18 05:55:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:55:03,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:03,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:03,103 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) [2022-01-18 05:55:03,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 05:55:03,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:55:03,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:03,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:03,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:55:03,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:55:03,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528682574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:03,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:03,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-18 05:55:03,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080530438] [2022-01-18 05:55:03,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:03,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:55:03,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:55:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:55:03,272 INFO L87 Difference]: Start difference. First operand 2045 states and 7253 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:03,407 INFO L93 Difference]: Finished difference Result 2262 states and 7867 transitions. [2022-01-18 05:55:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:55:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:55:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:03,412 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 05:55:03,413 INFO L226 Difference]: Without dead ends: 2241 [2022-01-18 05:55:03,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:55:03,414 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:03,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 189 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:55:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-01-18 05:55:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 2055. [2022-01-18 05:55:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.552093476144109) internal successors, (7296), 2054 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 7296 transitions. [2022-01-18 05:55:03,459 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 7296 transitions. Word has length 21 [2022-01-18 05:55:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:03,460 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 7296 transitions. [2022-01-18 05:55:03,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 7296 transitions. [2022-01-18 05:55:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:55:03,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:03,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:03,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:03,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:03,687 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1826441102, now seen corresponding path program 9 times [2022-01-18 05:55:03,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:03,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172985998] [2022-01-18 05:55:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:03,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:03,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:03,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172985998] [2022-01-18 05:55:03,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172985998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:03,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945229303] [2022-01-18 05:55:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:55:03,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:03,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:03,758 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) [2022-01-18 05:55:03,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 05:55:03,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:55:03,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:03,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:55:03,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:55:03,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945229303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:03,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:03,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-18 05:55:03,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316345422] [2022-01-18 05:55:03,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:03,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:55:03,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:03,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:55:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:55:03,906 INFO L87 Difference]: Start difference. First operand 2055 states and 7296 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2022-01-18 05:55:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:04,070 INFO L93 Difference]: Finished difference Result 2335 states and 8077 transitions. [2022-01-18 05:55:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:55:04,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 05:55:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:04,076 INFO L225 Difference]: With dead ends: 2335 [2022-01-18 05:55:04,076 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 05:55:04,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:55:04,077 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:04,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 276 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:55:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 05:55:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2071. [2022-01-18 05:55:04,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2070 states have (on average 3.557487922705314) internal successors, (7364), 2070 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 7364 transitions. [2022-01-18 05:55:04,123 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 7364 transitions. Word has length 21 [2022-01-18 05:55:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:04,123 INFO L470 AbstractCegarLoop]: Abstraction has 2071 states and 7364 transitions. [2022-01-18 05:55:04,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2022-01-18 05:55:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 7364 transitions. [2022-01-18 05:55:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:04,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:04,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:04,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:04,350 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,SelfDestructingSolverStorable30 [2022-01-18 05:55:04,350 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:04,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:04,350 INFO L85 PathProgramCache]: Analyzing trace with hash 766837372, now seen corresponding path program 10 times [2022-01-18 05:55:04,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:04,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722168566] [2022-01-18 05:55:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:04,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:04,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722168566] [2022-01-18 05:55:04,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722168566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322708626] [2022-01-18 05:55:04,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:55:04,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:04,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:04,394 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) [2022-01-18 05:55:04,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 05:55:04,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:55:04,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:04,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:04,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:04,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:04,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322708626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:04,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:04,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 05:55:04,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76485828] [2022-01-18 05:55:04,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:04,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:55:04,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:04,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:55:04,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:55:04,570 INFO L87 Difference]: Start difference. First operand 2071 states and 7364 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:04,923 INFO L93 Difference]: Finished difference Result 8017 states and 28472 transitions. [2022-01-18 05:55:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:55:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:04,939 INFO L225 Difference]: With dead ends: 8017 [2022-01-18 05:55:04,939 INFO L226 Difference]: Without dead ends: 8017 [2022-01-18 05:55:04,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:55:04,940 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:04,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 104 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2022-01-18 05:55:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 4750. [2022-01-18 05:55:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4749 states have (on average 3.6249736786691935) internal successors, (17215), 4749 states have internal predecessors, (17215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 17215 transitions. [2022-01-18 05:55:05,068 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 17215 transitions. Word has length 23 [2022-01-18 05:55:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:05,068 INFO L470 AbstractCegarLoop]: Abstraction has 4750 states and 17215 transitions. [2022-01-18 05:55:05,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 17215 transitions. [2022-01-18 05:55:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:05,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:05,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:05,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:05,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:05,295 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:05,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash -439625992, now seen corresponding path program 11 times [2022-01-18 05:55:05,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:05,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507448378] [2022-01-18 05:55:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:05,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:05,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507448378] [2022-01-18 05:55:05,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507448378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41613994] [2022-01-18 05:55:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:55:05,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:05,331 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) [2022-01-18 05:55:05,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 05:55:05,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:55:05,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:05,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:05,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:05,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41613994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:05,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:05,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-01-18 05:55:05,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016531600] [2022-01-18 05:55:05,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:05,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:55:05,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:55:05,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:55:05,506 INFO L87 Difference]: Start difference. First operand 4750 states and 17215 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:05,729 INFO L93 Difference]: Finished difference Result 5512 states and 19596 transitions. [2022-01-18 05:55:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:55:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:05,739 INFO L225 Difference]: With dead ends: 5512 [2022-01-18 05:55:05,740 INFO L226 Difference]: Without dead ends: 5456 [2022-01-18 05:55:05,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:55:05,740 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 165 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:05,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 53 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:55:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2022-01-18 05:55:05,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4829. [2022-01-18 05:55:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 3.6184755592377797) internal successors, (17470), 4828 states have internal predecessors, (17470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 17470 transitions. [2022-01-18 05:55:05,825 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 17470 transitions. Word has length 23 [2022-01-18 05:55:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:05,825 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 17470 transitions. [2022-01-18 05:55:05,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 17470 transitions. [2022-01-18 05:55:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:05,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:05,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:05,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:06,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:06,058 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:06,059 INFO L85 PathProgramCache]: Analyzing trace with hash -630242892, now seen corresponding path program 12 times [2022-01-18 05:55:06,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:06,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644420764] [2022-01-18 05:55:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:06,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:06,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:06,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644420764] [2022-01-18 05:55:06,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644420764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:06,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293230186] [2022-01-18 05:55:06,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:55:06,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:06,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:06,089 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) [2022-01-18 05:55:06,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 05:55:06,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:55:06,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:06,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:06,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:06,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293230186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:06,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:06,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 05:55:06,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993779951] [2022-01-18 05:55:06,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:06,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:55:06,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:55:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:55:06,299 INFO L87 Difference]: Start difference. First operand 4829 states and 17470 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:55:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:06,696 INFO L93 Difference]: Finished difference Result 7408 states and 25768 transitions. [2022-01-18 05:55:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:55:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 23 [2022-01-18 05:55:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:06,712 INFO L225 Difference]: With dead ends: 7408 [2022-01-18 05:55:06,713 INFO L226 Difference]: Without dead ends: 7400 [2022-01-18 05:55:06,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:55:06,713 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 294 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:06,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 136 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7400 states. [2022-01-18 05:55:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7400 to 6112. [2022-01-18 05:55:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.6293568973981345) internal successors, (22179), 6111 states have internal predecessors, (22179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 22179 transitions. [2022-01-18 05:55:06,837 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 22179 transitions. Word has length 23 [2022-01-18 05:55:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:06,837 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 22179 transitions. [2022-01-18 05:55:06,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:55:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 22179 transitions. [2022-01-18 05:55:06,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:06,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:06,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:06,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:07,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:07,073 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2041910604, now seen corresponding path program 1 times [2022-01-18 05:55:07,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:07,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965328697] [2022-01-18 05:55:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:07,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:07,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:07,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965328697] [2022-01-18 05:55:07,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965328697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:07,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61726097] [2022-01-18 05:55:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:07,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:07,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:07,117 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) [2022-01-18 05:55:07,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 05:55:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:07,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:07,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61726097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:07,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:07,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 05:55:07,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191343109] [2022-01-18 05:55:07,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:07,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:55:07,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:55:07,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:55:07,351 INFO L87 Difference]: Start difference. First operand 6112 states and 22179 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-01-18 05:55:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:07,707 INFO L93 Difference]: Finished difference Result 14261 states and 51664 transitions. [2022-01-18 05:55:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:55:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 23 [2022-01-18 05:55:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:07,739 INFO L225 Difference]: With dead ends: 14261 [2022-01-18 05:55:07,739 INFO L226 Difference]: Without dead ends: 14255 [2022-01-18 05:55:07,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:55:07,740 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:07,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 70 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2022-01-18 05:55:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 11458. [2022-01-18 05:55:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11458 states, 11457 states have (on average 3.6823775857554333) internal successors, (42189), 11457 states have internal predecessors, (42189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 42189 transitions. [2022-01-18 05:55:07,991 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 42189 transitions. Word has length 23 [2022-01-18 05:55:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:07,991 INFO L470 AbstractCegarLoop]: Abstraction has 11458 states and 42189 transitions. [2022-01-18 05:55:07,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-01-18 05:55:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 42189 transitions. [2022-01-18 05:55:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:08,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:08,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:08,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 05:55:08,210 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,SelfDestructingSolverStorable34 [2022-01-18 05:55:08,211 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1063353160, now seen corresponding path program 2 times [2022-01-18 05:55:08,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430057181] [2022-01-18 05:55:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:08,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:08,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:08,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430057181] [2022-01-18 05:55:08,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430057181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:08,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84094373] [2022-01-18 05:55:08,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:55:08,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:08,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:08,248 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) [2022-01-18 05:55:08,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 05:55:08,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:55:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:08,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:08,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:08,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84094373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:08,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:08,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 05:55:08,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691040498] [2022-01-18 05:55:08,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:08,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:55:08,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:08,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:55:08,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:55:08,444 INFO L87 Difference]: Start difference. First operand 11458 states and 42189 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-01-18 05:55:08,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:08,919 INFO L93 Difference]: Finished difference Result 23254 states and 84564 transitions. [2022-01-18 05:55:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:55:08,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 23 [2022-01-18 05:55:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:09,142 INFO L225 Difference]: With dead ends: 23254 [2022-01-18 05:55:09,143 INFO L226 Difference]: Without dead ends: 23254 [2022-01-18 05:55:09,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=357, Invalid=699, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:55:09,143 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 294 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:09,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 162 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23254 states. [2022-01-18 05:55:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23254 to 18401. [2022-01-18 05:55:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18401 states, 18400 states have (on average 3.7019021739130435) internal successors, (68115), 18400 states have internal predecessors, (68115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18401 states to 18401 states and 68115 transitions. [2022-01-18 05:55:09,595 INFO L78 Accepts]: Start accepts. Automaton has 18401 states and 68115 transitions. Word has length 23 [2022-01-18 05:55:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:09,595 INFO L470 AbstractCegarLoop]: Abstraction has 18401 states and 68115 transitions. [2022-01-18 05:55:09,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-01-18 05:55:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18401 states and 68115 transitions. [2022-01-18 05:55:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:09,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:09,624 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:09,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 05:55:09,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 05:55:09,824 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash -757118540, now seen corresponding path program 13 times [2022-01-18 05:55:09,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839539049] [2022-01-18 05:55:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:09,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:09,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:09,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839539049] [2022-01-18 05:55:09,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839539049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169423413] [2022-01-18 05:55:09,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:55:09,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:09,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:09,960 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) [2022-01-18 05:55:09,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 05:55:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:10,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:10,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169423413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:10,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:10,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 05:55:10,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560959927] [2022-01-18 05:55:10,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:10,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:55:10,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:55:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:55:10,232 INFO L87 Difference]: Start difference. First operand 18401 states and 68115 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:55:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:10,752 INFO L93 Difference]: Finished difference Result 19801 states and 72677 transitions. [2022-01-18 05:55:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:55:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 23 [2022-01-18 05:55:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:10,811 INFO L225 Difference]: With dead ends: 19801 [2022-01-18 05:55:10,811 INFO L226 Difference]: Without dead ends: 19781 [2022-01-18 05:55:10,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:55:10,812 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:10,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 98 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2022-01-18 05:55:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 18392. [2022-01-18 05:55:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18392 states, 18391 states have (on average 3.7013756728834757) internal successors, (68072), 18391 states have internal predecessors, (68072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18392 states to 18392 states and 68072 transitions. [2022-01-18 05:55:11,274 INFO L78 Accepts]: Start accepts. Automaton has 18392 states and 68072 transitions. Word has length 23 [2022-01-18 05:55:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:11,274 INFO L470 AbstractCegarLoop]: Abstraction has 18392 states and 68072 transitions. [2022-01-18 05:55:11,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:55:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 18392 states and 68072 transitions. [2022-01-18 05:55:11,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:11,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:11,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:11,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 05:55:11,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:11,501 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1151142540, now seen corresponding path program 3 times [2022-01-18 05:55:11,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:11,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992141547] [2022-01-18 05:55:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:11,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:11,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992141547] [2022-01-18 05:55:11,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992141547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087961158] [2022-01-18 05:55:11,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:55:11,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:11,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:11,552 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) [2022-01-18 05:55:11,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 05:55:11,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:55:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:11,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:11,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:11,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:11,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087961158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:11,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:11,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 05:55:11,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966985057] [2022-01-18 05:55:11,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:11,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:55:11,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:55:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:55:11,761 INFO L87 Difference]: Start difference. First operand 18392 states and 68072 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:12,388 INFO L93 Difference]: Finished difference Result 31050 states and 114087 transitions. [2022-01-18 05:55:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:55:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:12,576 INFO L225 Difference]: With dead ends: 31050 [2022-01-18 05:55:12,576 INFO L226 Difference]: Without dead ends: 31050 [2022-01-18 05:55:12,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:55:12,577 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:12,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 121 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2022-01-18 05:55:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18487. [2022-01-18 05:55:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6850589635399764) internal successors, (68122), 18486 states have internal predecessors, (68122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68122 transitions. [2022-01-18 05:55:13,268 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68122 transitions. Word has length 23 [2022-01-18 05:55:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:13,268 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68122 transitions. [2022-01-18 05:55:13,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68122 transitions. [2022-01-18 05:55:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:13,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:13,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:13,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:13,515 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,SelfDestructingSolverStorable37 [2022-01-18 05:55:13,516 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1701574328, now seen corresponding path program 14 times [2022-01-18 05:55:13,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:13,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497386226] [2022-01-18 05:55:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:13,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:13,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:13,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497386226] [2022-01-18 05:55:13,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497386226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:13,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732621028] [2022-01-18 05:55:13,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:55:13,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:13,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:13,550 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) [2022-01-18 05:55:13,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 05:55:13,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:55:13,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:13,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:13,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:13,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732621028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:13,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:13,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 05:55:13,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846239403] [2022-01-18 05:55:13,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:13,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:55:13,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:55:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:55:13,729 INFO L87 Difference]: Start difference. First operand 18487 states and 68122 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:14,223 INFO L93 Difference]: Finished difference Result 19677 states and 71789 transitions. [2022-01-18 05:55:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:55:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:14,280 INFO L225 Difference]: With dead ends: 19677 [2022-01-18 05:55:14,280 INFO L226 Difference]: Without dead ends: 19617 [2022-01-18 05:55:14,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=442, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:55:14,281 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:14,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 75 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19617 states. [2022-01-18 05:55:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19617 to 18487. [2022-01-18 05:55:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6806231742940603) internal successors, (68040), 18486 states have internal predecessors, (68040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68040 transitions. [2022-01-18 05:55:14,799 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68040 transitions. Word has length 23 [2022-01-18 05:55:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:14,799 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68040 transitions. [2022-01-18 05:55:14,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68040 transitions. [2022-01-18 05:55:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:14,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:14,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:14,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:15,064 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,SelfDestructingSolverStorable38 [2022-01-18 05:55:15,065 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1169726578, now seen corresponding path program 4 times [2022-01-18 05:55:15,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:15,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064429403] [2022-01-18 05:55:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:15,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:15,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064429403] [2022-01-18 05:55:15,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064429403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630966330] [2022-01-18 05:55:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:55:15,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:15,154 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) [2022-01-18 05:55:15,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 05:55:15,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:55:15,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:15,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:15,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630966330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:15,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:15,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:55:15,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811097117] [2022-01-18 05:55:15,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:15,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:15,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:15,664 INFO L87 Difference]: Start difference. First operand 18487 states and 68040 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:16,881 INFO L93 Difference]: Finished difference Result 26583 states and 95562 transitions. [2022-01-18 05:55:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:55:16,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 05:55:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:16,957 INFO L225 Difference]: With dead ends: 26583 [2022-01-18 05:55:16,957 INFO L226 Difference]: Without dead ends: 26479 [2022-01-18 05:55:16,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1415, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 05:55:16,958 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 285 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:16,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 211 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:55:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26479 states. [2022-01-18 05:55:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26479 to 19145. [2022-01-18 05:55:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19145 states, 19144 states have (on average 3.6745716673631423) internal successors, (70346), 19144 states have internal predecessors, (70346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 70346 transitions. [2022-01-18 05:55:17,416 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 70346 transitions. Word has length 23 [2022-01-18 05:55:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:17,416 INFO L470 AbstractCegarLoop]: Abstraction has 19145 states and 70346 transitions. [2022-01-18 05:55:17,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 70346 transitions. [2022-01-18 05:55:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:17,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:17,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:17,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:17,643 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,SelfDestructingSolverStorable39 [2022-01-18 05:55:17,643 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:17,644 INFO L85 PathProgramCache]: Analyzing trace with hash -373032338, now seen corresponding path program 5 times [2022-01-18 05:55:17,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:17,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985042326] [2022-01-18 05:55:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:17,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:17,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985042326] [2022-01-18 05:55:17,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985042326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290715996] [2022-01-18 05:55:17,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:55:17,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:17,722 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) [2022-01-18 05:55:17,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 05:55:17,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:55:17,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:17,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:18,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290715996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:18,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:18,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:55:18,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454883937] [2022-01-18 05:55:18,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:18,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:18,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:18,180 INFO L87 Difference]: Start difference. First operand 19145 states and 70346 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:19,236 INFO L93 Difference]: Finished difference Result 20543 states and 74413 transitions. [2022-01-18 05:55:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 05:55:19,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:19,294 INFO L225 Difference]: With dead ends: 20543 [2022-01-18 05:55:19,294 INFO L226 Difference]: Without dead ends: 20495 [2022-01-18 05:55:19,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:55:19,295 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:19,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 216 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 575 Invalid, 0 Unknown, 198 Unchecked, 0.5s Time] [2022-01-18 05:55:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20495 states. [2022-01-18 05:55:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20495 to 19199. [2022-01-18 05:55:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19199 states, 19198 states have (on average 3.672465881862694) internal successors, (70504), 19198 states have internal predecessors, (70504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19199 states to 19199 states and 70504 transitions. [2022-01-18 05:55:19,768 INFO L78 Accepts]: Start accepts. Automaton has 19199 states and 70504 transitions. Word has length 23 [2022-01-18 05:55:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 19199 states and 70504 transitions. [2022-01-18 05:55:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 19199 states and 70504 transitions. [2022-01-18 05:55:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:19,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:19,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:19,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 05:55:19,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:19,997 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash -454431394, now seen corresponding path program 6 times [2022-01-18 05:55:19,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005946140] [2022-01-18 05:55:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:19,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:20,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:20,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005946140] [2022-01-18 05:55:20,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005946140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:20,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942502508] [2022-01-18 05:55:20,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:55:20,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:20,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:20,073 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) [2022-01-18 05:55:20,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 05:55:20,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:55:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:20,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:20,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:20,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942502508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:20,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:20,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:55:20,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768075204] [2022-01-18 05:55:20,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:20,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:20,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:20,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:20,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:20,508 INFO L87 Difference]: Start difference. First operand 19199 states and 70504 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:22,484 INFO L93 Difference]: Finished difference Result 30752 states and 110074 transitions. [2022-01-18 05:55:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:55:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 05:55:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:22,589 INFO L225 Difference]: With dead ends: 30752 [2022-01-18 05:55:22,590 INFO L226 Difference]: Without dead ends: 30612 [2022-01-18 05:55:22,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:55:22,591 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 335 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:22,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 216 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:55:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30612 states. [2022-01-18 05:55:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30612 to 19275. [2022-01-18 05:55:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19275 states, 19274 states have (on average 3.6694510739856803) internal successors, (70725), 19274 states have internal predecessors, (70725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19275 states to 19275 states and 70725 transitions. [2022-01-18 05:55:23,091 INFO L78 Accepts]: Start accepts. Automaton has 19275 states and 70725 transitions. Word has length 23 [2022-01-18 05:55:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:23,091 INFO L470 AbstractCegarLoop]: Abstraction has 19275 states and 70725 transitions. [2022-01-18 05:55:23,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 19275 states and 70725 transitions. [2022-01-18 05:55:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:23,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:23,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:23,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 05:55:23,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:23,319 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -40815462, now seen corresponding path program 7 times [2022-01-18 05:55:23,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:23,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113949482] [2022-01-18 05:55:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:23,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:23,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:23,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113949482] [2022-01-18 05:55:23,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113949482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:23,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663627316] [2022-01-18 05:55:23,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:55:23,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:23,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:23,398 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) [2022-01-18 05:55:23,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 05:55:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:23,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:23,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663627316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:23,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:23,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:55:23,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452987455] [2022-01-18 05:55:23,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:23,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:23,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:23,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:23,824 INFO L87 Difference]: Start difference. First operand 19275 states and 70725 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) [2022-01-18 05:55:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:25,341 INFO L93 Difference]: Finished difference Result 26138 states and 93717 transitions. [2022-01-18 05:55:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:55:25,342 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 23 [2022-01-18 05:55:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:25,416 INFO L225 Difference]: With dead ends: 26138 [2022-01-18 05:55:25,416 INFO L226 Difference]: Without dead ends: 26054 [2022-01-18 05:55:25,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:55:25,417 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 347 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:25,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 145 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:55:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26054 states. [2022-01-18 05:55:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26054 to 19283. [2022-01-18 05:55:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19283 states, 19282 states have (on average 3.668395394668603) internal successors, (70734), 19282 states have internal predecessors, (70734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19283 states to 19283 states and 70734 transitions. [2022-01-18 05:55:25,944 INFO L78 Accepts]: Start accepts. Automaton has 19283 states and 70734 transitions. Word has length 23 [2022-01-18 05:55:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:25,944 INFO L470 AbstractCegarLoop]: Abstraction has 19283 states and 70734 transitions. [2022-01-18 05:55:25,944 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) [2022-01-18 05:55:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 19283 states and 70734 transitions. [2022-01-18 05:55:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:25,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:25,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:25,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:26,180 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,SelfDestructingSolverStorable42 [2022-01-18 05:55:26,180 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash 18908732, now seen corresponding path program 8 times [2022-01-18 05:55:26,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:26,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965577593] [2022-01-18 05:55:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:26,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:26,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965577593] [2022-01-18 05:55:26,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965577593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690789751] [2022-01-18 05:55:26,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:55:26,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:26,256 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) [2022-01-18 05:55:26,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 05:55:26,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:55:26,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:26,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:26,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:26,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690789751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:26,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:26,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:55:26,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937641677] [2022-01-18 05:55:26,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:26,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:26,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:26,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:26,725 INFO L87 Difference]: Start difference. First operand 19283 states and 70734 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:27,676 INFO L93 Difference]: Finished difference Result 24943 states and 90273 transitions. [2022-01-18 05:55:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 05:55:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 05:55:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:27,737 INFO L225 Difference]: With dead ends: 24943 [2022-01-18 05:55:27,738 INFO L226 Difference]: Without dead ends: 24663 [2022-01-18 05:55:27,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:55:27,738 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:27,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 156 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 568 Invalid, 0 Unknown, 177 Unchecked, 0.3s Time] [2022-01-18 05:55:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24663 states. [2022-01-18 05:55:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24663 to 19600. [2022-01-18 05:55:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19600 states, 19599 states have (on average 3.6688606561559265) internal successors, (71906), 19599 states have internal predecessors, (71906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19600 states to 19600 states and 71906 transitions. [2022-01-18 05:55:28,269 INFO L78 Accepts]: Start accepts. Automaton has 19600 states and 71906 transitions. Word has length 23 [2022-01-18 05:55:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:28,269 INFO L470 AbstractCegarLoop]: Abstraction has 19600 states and 71906 transitions. [2022-01-18 05:55:28,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 19600 states and 71906 transitions. [2022-01-18 05:55:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:28,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:28,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:28,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:28,498 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,SelfDestructingSolverStorable43 [2022-01-18 05:55:28,498 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1523850184, now seen corresponding path program 9 times [2022-01-18 05:55:28,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:28,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955695807] [2022-01-18 05:55:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:28,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:28,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:28,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955695807] [2022-01-18 05:55:28,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955695807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:28,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187348895] [2022-01-18 05:55:28,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:55:28,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:28,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:28,598 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) [2022-01-18 05:55:28,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 05:55:28,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:55:28,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:28,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:29,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187348895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:29,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:29,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:55:29,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951457600] [2022-01-18 05:55:29,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:29,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:29,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:29,044 INFO L87 Difference]: Start difference. First operand 19600 states and 71906 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:29,759 INFO L93 Difference]: Finished difference Result 22433 states and 81186 transitions. [2022-01-18 05:55:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:55:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:29,823 INFO L225 Difference]: With dead ends: 22433 [2022-01-18 05:55:29,823 INFO L226 Difference]: Without dead ends: 22344 [2022-01-18 05:55:29,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:55:29,824 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 204 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:29,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 176 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 545 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-01-18 05:55:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22344 states. [2022-01-18 05:55:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22344 to 19686. [2022-01-18 05:55:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19686 states, 19685 states have (on average 3.6756413512827026) internal successors, (72355), 19685 states have internal predecessors, (72355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19686 states to 19686 states and 72355 transitions. [2022-01-18 05:55:30,390 INFO L78 Accepts]: Start accepts. Automaton has 19686 states and 72355 transitions. Word has length 23 [2022-01-18 05:55:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:30,390 INFO L470 AbstractCegarLoop]: Abstraction has 19686 states and 72355 transitions. [2022-01-18 05:55:30,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 19686 states and 72355 transitions. [2022-01-18 05:55:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:30,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:30,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:30,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:30,623 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,SelfDestructingSolverStorable44 [2022-01-18 05:55:30,623 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1508260856, now seen corresponding path program 10 times [2022-01-18 05:55:30,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:30,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055745407] [2022-01-18 05:55:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:30,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:30,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:30,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055745407] [2022-01-18 05:55:30,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055745407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:30,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025967207] [2022-01-18 05:55:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:55:30,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:30,742 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) [2022-01-18 05:55:30,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 05:55:30,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:55:30,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:30,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:30,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:30,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:31,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025967207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:31,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:31,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:55:31,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261638684] [2022-01-18 05:55:31,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:31,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:31,242 INFO L87 Difference]: Start difference. First operand 19686 states and 72355 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:31,980 INFO L93 Difference]: Finished difference Result 20917 states and 75946 transitions. [2022-01-18 05:55:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:55:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 05:55:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:32,033 INFO L225 Difference]: With dead ends: 20917 [2022-01-18 05:55:32,033 INFO L226 Difference]: Without dead ends: 20783 [2022-01-18 05:55:32,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:55:32,033 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 202 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:32,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 131 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 499 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-18 05:55:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20783 states. [2022-01-18 05:55:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20783 to 19749. [2022-01-18 05:55:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19749 states, 19748 states have (on average 3.675055701843225) internal successors, (72575), 19748 states have internal predecessors, (72575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 72575 transitions. [2022-01-18 05:55:32,404 INFO L78 Accepts]: Start accepts. Automaton has 19749 states and 72575 transitions. Word has length 23 [2022-01-18 05:55:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:32,405 INFO L470 AbstractCegarLoop]: Abstraction has 19749 states and 72575 transitions. [2022-01-18 05:55:32,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:55:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 19749 states and 72575 transitions. [2022-01-18 05:55:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:32,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:32,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:32,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 05:55:32,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 05:55:32,639 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:32,639 INFO L85 PathProgramCache]: Analyzing trace with hash 449096986, now seen corresponding path program 11 times [2022-01-18 05:55:32,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:32,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657956634] [2022-01-18 05:55:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:32,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:32,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:32,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657956634] [2022-01-18 05:55:32,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657956634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:32,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609699277] [2022-01-18 05:55:32,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:55:32,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:32,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:32,762 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) [2022-01-18 05:55:32,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 05:55:32,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:55:32,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:32,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:55:32,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:32,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609699277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:33,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:33,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:55:33,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974273125] [2022-01-18 05:55:33,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:33,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:55:33,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:55:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:55:33,257 INFO L87 Difference]: Start difference. First operand 19749 states and 72575 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:33,968 INFO L93 Difference]: Finished difference Result 24592 states and 89552 transitions. [2022-01-18 05:55:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:55:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:34,059 INFO L225 Difference]: With dead ends: 24592 [2022-01-18 05:55:34,059 INFO L226 Difference]: Without dead ends: 24408 [2022-01-18 05:55:34,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:55:34,060 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 125 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:34,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 221 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 681 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-01-18 05:55:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2022-01-18 05:55:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 19744. [2022-01-18 05:55:34,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19744 states, 19743 states have (on average 3.6747708048422227) internal successors, (72551), 19743 states have internal predecessors, (72551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19744 states to 19744 states and 72551 transitions. [2022-01-18 05:55:34,599 INFO L78 Accepts]: Start accepts. Automaton has 19744 states and 72551 transitions. Word has length 23 [2022-01-18 05:55:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:34,599 INFO L470 AbstractCegarLoop]: Abstraction has 19744 states and 72551 transitions. [2022-01-18 05:55:34,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 19744 states and 72551 transitions. [2022-01-18 05:55:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:34,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:34,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:34,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 05:55:34,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:34,838 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash 470852840, now seen corresponding path program 12 times [2022-01-18 05:55:34,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:34,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079434603] [2022-01-18 05:55:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:34,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:34,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:34,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079434603] [2022-01-18 05:55:34,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079434603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:34,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459625731] [2022-01-18 05:55:34,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:55:34,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:34,889 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) [2022-01-18 05:55:34,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 05:55:34,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:55:34,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 05:55:34,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:34,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459625731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:35,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:35,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 05:55:35,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087140232] [2022-01-18 05:55:35,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:35,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:55:35,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:55:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:55:35,212 INFO L87 Difference]: Start difference. First operand 19744 states and 72551 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:36,101 INFO L93 Difference]: Finished difference Result 26675 states and 95881 transitions. [2022-01-18 05:55:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:55:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:36,194 INFO L225 Difference]: With dead ends: 26675 [2022-01-18 05:55:36,194 INFO L226 Difference]: Without dead ends: 26613 [2022-01-18 05:55:36,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=1476, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 05:55:36,195 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 305 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:36,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 210 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:55:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-01-18 05:55:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 20348. [2022-01-18 05:55:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20348 states, 20347 states have (on average 3.6653069248537866) internal successors, (74578), 20347 states have internal predecessors, (74578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20348 states to 20348 states and 74578 transitions. [2022-01-18 05:55:36,765 INFO L78 Accepts]: Start accepts. Automaton has 20348 states and 74578 transitions. Word has length 23 [2022-01-18 05:55:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:36,765 INFO L470 AbstractCegarLoop]: Abstraction has 20348 states and 74578 transitions. [2022-01-18 05:55:36,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20348 states and 74578 transitions. [2022-01-18 05:55:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:36,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:36,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:36,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 05:55:36,997 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,SelfDestructingSolverStorable47 [2022-01-18 05:55:36,997 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 328283496, now seen corresponding path program 13 times [2022-01-18 05:55:36,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083045041] [2022-01-18 05:55:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:36,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:37,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:37,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083045041] [2022-01-18 05:55:37,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083045041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:37,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016582822] [2022-01-18 05:55:37,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:55:37,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:37,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:37,066 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) [2022-01-18 05:55:37,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 05:55:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:37,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016582822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:37,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:37,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 05:55:37,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689311921] [2022-01-18 05:55:37,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:37,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:55:37,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:55:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:55:37,384 INFO L87 Difference]: Start difference. First operand 20348 states and 74578 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:38,988 INFO L93 Difference]: Finished difference Result 49018 states and 178154 transitions. [2022-01-18 05:55:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 05:55:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:39,188 INFO L225 Difference]: With dead ends: 49018 [2022-01-18 05:55:39,188 INFO L226 Difference]: Without dead ends: 49000 [2022-01-18 05:55:39,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=914, Invalid=2746, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 05:55:39,190 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 468 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:39,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 227 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:55:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49000 states. [2022-01-18 05:55:39,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49000 to 29431. [2022-01-18 05:55:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29431 states, 29430 states have (on average 3.6643221202854233) internal successors, (107841), 29430 states have internal predecessors, (107841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29431 states to 29431 states and 107841 transitions. [2022-01-18 05:55:40,071 INFO L78 Accepts]: Start accepts. Automaton has 29431 states and 107841 transitions. Word has length 23 [2022-01-18 05:55:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:40,071 INFO L470 AbstractCegarLoop]: Abstraction has 29431 states and 107841 transitions. [2022-01-18 05:55:40,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 29431 states and 107841 transitions. [2022-01-18 05:55:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:40,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:40,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:40,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 05:55:40,317 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,SelfDestructingSolverStorable48 [2022-01-18 05:55:40,317 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1368451066, now seen corresponding path program 14 times [2022-01-18 05:55:40,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:40,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055572441] [2022-01-18 05:55:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:40,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:40,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:40,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055572441] [2022-01-18 05:55:40,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055572441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:40,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690979843] [2022-01-18 05:55:40,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:55:40,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:40,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:40,377 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) [2022-01-18 05:55:40,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 05:55:40,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:55:40,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:40,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:40,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690979843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:40,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:40,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 05:55:40,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912964497] [2022-01-18 05:55:40,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:40,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:55:40,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:55:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:55:40,693 INFO L87 Difference]: Start difference. First operand 29431 states and 107841 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:41,933 INFO L93 Difference]: Finished difference Result 40726 states and 147311 transitions. [2022-01-18 05:55:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 05:55:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:42,070 INFO L225 Difference]: With dead ends: 40726 [2022-01-18 05:55:42,070 INFO L226 Difference]: Without dead ends: 40718 [2022-01-18 05:55:42,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=655, Invalid=2101, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 05:55:42,071 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 353 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:42,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 286 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:55:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2022-01-18 05:55:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 29455. [2022-01-18 05:55:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29455 states, 29454 states have (on average 3.6647653968900658) internal successors, (107942), 29454 states have internal predecessors, (107942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29455 states to 29455 states and 107942 transitions. [2022-01-18 05:55:42,975 INFO L78 Accepts]: Start accepts. Automaton has 29455 states and 107942 transitions. Word has length 23 [2022-01-18 05:55:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:42,975 INFO L470 AbstractCegarLoop]: Abstraction has 29455 states and 107942 transitions. [2022-01-18 05:55:42,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29455 states and 107942 transitions. [2022-01-18 05:55:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:43,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:43,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:43,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 05:55:43,225 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,SelfDestructingSolverStorable49 [2022-01-18 05:55:43,226 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash 545416052, now seen corresponding path program 15 times [2022-01-18 05:55:43,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:43,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398014036] [2022-01-18 05:55:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:43,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:43,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398014036] [2022-01-18 05:55:43,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398014036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010530632] [2022-01-18 05:55:43,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:55:43,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:43,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:43,283 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) [2022-01-18 05:55:43,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 05:55:43,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:55:43,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:43,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:43,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010530632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:43,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:43,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 05:55:43,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827133098] [2022-01-18 05:55:43,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:43,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:55:43,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:43,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:55:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:55:43,621 INFO L87 Difference]: Start difference. First operand 29455 states and 107942 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:44,923 INFO L93 Difference]: Finished difference Result 54419 states and 194123 transitions. [2022-01-18 05:55:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:55:44,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:45,116 INFO L225 Difference]: With dead ends: 54419 [2022-01-18 05:55:45,116 INFO L226 Difference]: Without dead ends: 54419 [2022-01-18 05:55:45,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=963, Invalid=2343, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 05:55:45,117 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 407 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:45,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 190 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:55:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54419 states. [2022-01-18 05:55:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54419 to 31116. [2022-01-18 05:55:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31116 states, 31115 states have (on average 3.6714767796882533) internal successors, (114238), 31115 states have internal predecessors, (114238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31116 states to 31116 states and 114238 transitions. [2022-01-18 05:55:46,175 INFO L78 Accepts]: Start accepts. Automaton has 31116 states and 114238 transitions. Word has length 23 [2022-01-18 05:55:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:46,175 INFO L470 AbstractCegarLoop]: Abstraction has 31116 states and 114238 transitions. [2022-01-18 05:55:46,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31116 states and 114238 transitions. [2022-01-18 05:55:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:46,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:46,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:46,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 05:55:46,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:46,430 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1796586428, now seen corresponding path program 16 times [2022-01-18 05:55:46,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:46,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863964762] [2022-01-18 05:55:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:46,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:46,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:46,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863964762] [2022-01-18 05:55:46,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863964762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:46,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883500160] [2022-01-18 05:55:46,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:55:46,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:46,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:46,486 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) [2022-01-18 05:55:46,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 05:55:46,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:55:46,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:46,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:46,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883500160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:46,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:46,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 05:55:46,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524265012] [2022-01-18 05:55:46,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:46,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:55:46,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:55:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:55:46,834 INFO L87 Difference]: Start difference. First operand 31116 states and 114238 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:48,532 INFO L93 Difference]: Finished difference Result 81071 states and 296560 transitions. [2022-01-18 05:55:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 05:55:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:48,843 INFO L225 Difference]: With dead ends: 81071 [2022-01-18 05:55:48,843 INFO L226 Difference]: Without dead ends: 81043 [2022-01-18 05:55:48,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2560, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:55:48,844 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 540 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:48,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 203 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:55:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81043 states. [2022-01-18 05:55:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 48981. [2022-01-18 05:55:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48981 states, 48980 states have (on average 3.6829726418946507) internal successors, (180392), 48980 states have internal predecessors, (180392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48981 states to 48981 states and 180392 transitions. [2022-01-18 05:55:50,951 INFO L78 Accepts]: Start accepts. Automaton has 48981 states and 180392 transitions. Word has length 23 [2022-01-18 05:55:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:50,951 INFO L470 AbstractCegarLoop]: Abstraction has 48981 states and 180392 transitions. [2022-01-18 05:55:50,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 48981 states and 180392 transitions. [2022-01-18 05:55:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:51,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:51,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:51,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 05:55:51,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:51,247 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash 99851866, now seen corresponding path program 17 times [2022-01-18 05:55:51,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994865835] [2022-01-18 05:55:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:51,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:51,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:51,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994865835] [2022-01-18 05:55:51,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994865835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:51,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548715830] [2022-01-18 05:55:51,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:55:51,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:51,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:51,311 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) [2022-01-18 05:55:51,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 05:55:51,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:55:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 05:55:51,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:51,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:51,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548715830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:51,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:51,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 05:55:51,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725536691] [2022-01-18 05:55:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:51,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:55:51,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:55:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:55:51,581 INFO L87 Difference]: Start difference. First operand 48981 states and 180392 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:53,147 INFO L93 Difference]: Finished difference Result 69282 states and 253017 transitions. [2022-01-18 05:55:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 05:55:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:55:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:53,387 INFO L225 Difference]: With dead ends: 69282 [2022-01-18 05:55:53,387 INFO L226 Difference]: Without dead ends: 69262 [2022-01-18 05:55:53,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:55:53,387 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 305 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:53,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 252 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:55:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69262 states. [2022-01-18 05:55:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69262 to 48988. [2022-01-18 05:55:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48988 states, 48987 states have (on average 3.6832220793271686) internal successors, (180430), 48987 states have internal predecessors, (180430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48988 states to 48988 states and 180430 transitions. [2022-01-18 05:55:54,930 INFO L78 Accepts]: Start accepts. Automaton has 48988 states and 180430 transitions. Word has length 23 [2022-01-18 05:55:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:54,930 INFO L470 AbstractCegarLoop]: Abstraction has 48988 states and 180430 transitions. [2022-01-18 05:55:54,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 48988 states and 180430 transitions. [2022-01-18 05:55:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:54,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:54,990 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:55,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:55,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:55,191 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1945857750, now seen corresponding path program 15 times [2022-01-18 05:55:55,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:55,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513720336] [2022-01-18 05:55:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:55,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:55,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513720336] [2022-01-18 05:55:55,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513720336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209750017] [2022-01-18 05:55:55,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:55:55,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:55,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:55,218 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) [2022-01-18 05:55:55,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 05:55:55,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:55:55,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:55,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:55,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:55,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:55,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209750017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:55,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:55,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 05:55:55,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674956406] [2022-01-18 05:55:55,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:55,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:55:55,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:55:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:55:55,428 INFO L87 Difference]: Start difference. First operand 48988 states and 180430 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:55:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:56,325 INFO L93 Difference]: Finished difference Result 51481 states and 188036 transitions. [2022-01-18 05:55:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 05:55:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 23 [2022-01-18 05:55:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:56,539 INFO L225 Difference]: With dead ends: 51481 [2022-01-18 05:55:56,539 INFO L226 Difference]: Without dead ends: 51425 [2022-01-18 05:55:56,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:55:56,539 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:56,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 132 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51425 states. [2022-01-18 05:55:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51425 to 49350. [2022-01-18 05:55:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49350 states, 49349 states have (on average 3.682404911953636) internal successors, (181723), 49349 states have internal predecessors, (181723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:55:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49350 states to 49350 states and 181723 transitions. [2022-01-18 05:55:57,970 INFO L78 Accepts]: Start accepts. Automaton has 49350 states and 181723 transitions. Word has length 23 [2022-01-18 05:55:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:55:57,970 INFO L470 AbstractCegarLoop]: Abstraction has 49350 states and 181723 transitions. [2022-01-18 05:55:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:55:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49350 states and 181723 transitions. [2022-01-18 05:55:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:55:58,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:55:58,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:55:58,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 05:55:58,235 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,SelfDestructingSolverStorable53 [2022-01-18 05:55:58,235 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:55:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:55:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2072733398, now seen corresponding path program 16 times [2022-01-18 05:55:58,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:55:58,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549358549] [2022-01-18 05:55:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:55:58,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:55:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:55:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:58,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:55:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549358549] [2022-01-18 05:55:58,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549358549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:55:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464475878] [2022-01-18 05:55:58,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:55:58,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:55:58,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:55:58,269 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) [2022-01-18 05:55:58,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 05:55:58,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:55:58,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:55:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:55:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:55:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:58,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:55:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:55:58,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464475878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:55:58,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:55:58,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 05:55:58,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118526742] [2022-01-18 05:55:58,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:55:58,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:55:58,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:55:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:55:58,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:55:58,477 INFO L87 Difference]: Start difference. First operand 49350 states and 181723 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:55:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:55:59,352 INFO L93 Difference]: Finished difference Result 50955 states and 186662 transitions. [2022-01-18 05:55:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:55:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 23 [2022-01-18 05:55:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:55:59,550 INFO L225 Difference]: With dead ends: 50955 [2022-01-18 05:55:59,550 INFO L226 Difference]: Without dead ends: 50937 [2022-01-18 05:55:59,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:55:59,551 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:55:59,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 130 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:55:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50937 states. [2022-01-18 05:56:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50937 to 49260. [2022-01-18 05:56:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49260 states, 49259 states have (on average 3.6830426927059015) internal successors, (181423), 49259 states have internal predecessors, (181423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49260 states to 49260 states and 181423 transitions. [2022-01-18 05:56:00,734 INFO L78 Accepts]: Start accepts. Automaton has 49260 states and 181423 transitions. Word has length 23 [2022-01-18 05:56:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:00,959 INFO L470 AbstractCegarLoop]: Abstraction has 49260 states and 181423 transitions. [2022-01-18 05:56:00,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:56:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 49260 states and 181423 transitions. [2022-01-18 05:56:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:01,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:01,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:01,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:01,271 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,SelfDestructingSolverStorable54 [2022-01-18 05:56:01,271 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 385959470, now seen corresponding path program 17 times [2022-01-18 05:56:01,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831862208] [2022-01-18 05:56:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:01,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:01,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:01,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831862208] [2022-01-18 05:56:01,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831862208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:01,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468255890] [2022-01-18 05:56:01,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:56:01,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:01,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:01,301 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) [2022-01-18 05:56:01,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 05:56:01,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:56:01,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:01,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:56:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:01,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468255890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:01,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:01,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 05:56:01,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954518331] [2022-01-18 05:56:01,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:01,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:56:01,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:56:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:56:01,507 INFO L87 Difference]: Start difference. First operand 49260 states and 181423 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:02,060 INFO L93 Difference]: Finished difference Result 50587 states and 185637 transitions. [2022-01-18 05:56:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:56:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:02,226 INFO L225 Difference]: With dead ends: 50587 [2022-01-18 05:56:02,226 INFO L226 Difference]: Without dead ends: 50502 [2022-01-18 05:56:02,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:56:02,226 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:02,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 73 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:56:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50502 states. [2022-01-18 05:56:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50502 to 49092. [2022-01-18 05:56:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49092 states, 49091 states have (on average 3.684870953942678) internal successors, (180894), 49091 states have internal predecessors, (180894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49092 states to 49092 states and 180894 transitions. [2022-01-18 05:56:03,798 INFO L78 Accepts]: Start accepts. Automaton has 49092 states and 180894 transitions. Word has length 23 [2022-01-18 05:56:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:03,798 INFO L470 AbstractCegarLoop]: Abstraction has 49092 states and 180894 transitions. [2022-01-18 05:56:03,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 49092 states and 180894 transitions. [2022-01-18 05:56:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:03,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:03,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:03,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 05:56:04,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 05:56:04,072 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1274385134, now seen corresponding path program 18 times [2022-01-18 05:56:04,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:04,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260642237] [2022-01-18 05:56:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:04,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:04,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260642237] [2022-01-18 05:56:04,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260642237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019029524] [2022-01-18 05:56:04,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:04,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:04,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:04,100 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) [2022-01-18 05:56:04,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 05:56:04,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:56:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:56:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:04,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:04,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019029524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:04,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:04,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 05:56:04,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153603167] [2022-01-18 05:56:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:04,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:56:04,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:56:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:56:04,368 INFO L87 Difference]: Start difference. First operand 49092 states and 180894 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:56:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:05,333 INFO L93 Difference]: Finished difference Result 51022 states and 186831 transitions. [2022-01-18 05:56:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:56:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 23 [2022-01-18 05:56:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:05,515 INFO L225 Difference]: With dead ends: 51022 [2022-01-18 05:56:05,515 INFO L226 Difference]: Without dead ends: 50982 [2022-01-18 05:56:05,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:56:05,515 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 167 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:05,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 145 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:56:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50982 states. [2022-01-18 05:56:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50982 to 49178. [2022-01-18 05:56:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49178 states, 49177 states have (on average 3.6849340138682716) internal successors, (181214), 49177 states have internal predecessors, (181214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49178 states to 49178 states and 181214 transitions. [2022-01-18 05:56:07,041 INFO L78 Accepts]: Start accepts. Automaton has 49178 states and 181214 transitions. Word has length 23 [2022-01-18 05:56:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:07,041 INFO L470 AbstractCegarLoop]: Abstraction has 49178 states and 181214 transitions. [2022-01-18 05:56:07,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:56:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 49178 states and 181214 transitions. [2022-01-18 05:56:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:07,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:07,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:07,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 05:56:07,313 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,SelfDestructingSolverStorable56 [2022-01-18 05:56:07,313 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:07,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1147509486, now seen corresponding path program 19 times [2022-01-18 05:56:07,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:07,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798582666] [2022-01-18 05:56:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:07,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:07,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:07,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798582666] [2022-01-18 05:56:07,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798582666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:07,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10728341] [2022-01-18 05:56:07,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:07,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:07,343 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) [2022-01-18 05:56:07,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 05:56:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:56:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:07,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:07,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10728341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:07,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:07,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 05:56:07,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20955948] [2022-01-18 05:56:07,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:07,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:56:07,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:56:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:56:07,568 INFO L87 Difference]: Start difference. First operand 49178 states and 181214 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:56:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:08,200 INFO L93 Difference]: Finished difference Result 50540 states and 185579 transitions. [2022-01-18 05:56:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 05:56:08,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 23 [2022-01-18 05:56:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:08,373 INFO L225 Difference]: With dead ends: 50540 [2022-01-18 05:56:08,373 INFO L226 Difference]: Without dead ends: 50527 [2022-01-18 05:56:08,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:56:08,374 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:08,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 83 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:56:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2022-01-18 05:56:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 49172. [2022-01-18 05:56:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49172 states, 49171 states have (on average 3.6848142197636817) internal successors, (181186), 49171 states have internal predecessors, (181186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49172 states to 49172 states and 181186 transitions. [2022-01-18 05:56:10,057 INFO L78 Accepts]: Start accepts. Automaton has 49172 states and 181186 transitions. Word has length 23 [2022-01-18 05:56:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:10,057 INFO L470 AbstractCegarLoop]: Abstraction has 49172 states and 181186 transitions. [2022-01-18 05:56:10,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-01-18 05:56:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 49172 states and 181186 transitions. [2022-01-18 05:56:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:10,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:10,130 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:10,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 05:56:10,339 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,SelfDestructingSolverStorable57 [2022-01-18 05:56:10,339 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1508650798, now seen corresponding path program 20 times [2022-01-18 05:56:10,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:10,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359075542] [2022-01-18 05:56:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:10,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:10,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:10,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359075542] [2022-01-18 05:56:10,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359075542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:10,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632399943] [2022-01-18 05:56:10,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:56:10,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:10,366 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) [2022-01-18 05:56:10,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 05:56:10,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:56:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:56:10,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:10,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:10,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632399943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:10,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:10,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-01-18 05:56:10,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139908320] [2022-01-18 05:56:10,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:10,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:56:10,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:56:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:56:10,609 INFO L87 Difference]: Start difference. First operand 49172 states and 181186 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:11,283 INFO L93 Difference]: Finished difference Result 50754 states and 186141 transitions. [2022-01-18 05:56:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:56:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:11,491 INFO L225 Difference]: With dead ends: 50754 [2022-01-18 05:56:11,491 INFO L226 Difference]: Without dead ends: 50754 [2022-01-18 05:56:11,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:56:11,491 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:11,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 123 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:56:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50754 states. [2022-01-18 05:56:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50754 to 49168. [2022-01-18 05:56:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.6840563792787844) internal successors, (181134), 49167 states have internal predecessors, (181134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 181134 transitions. [2022-01-18 05:56:13,117 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 181134 transitions. Word has length 23 [2022-01-18 05:56:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:13,117 INFO L470 AbstractCegarLoop]: Abstraction has 49168 states and 181134 transitions. [2022-01-18 05:56:13,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 181134 transitions. [2022-01-18 05:56:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:13,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:13,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:13,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 05:56:13,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 05:56:13,399 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2041659458, now seen corresponding path program 18 times [2022-01-18 05:56:13,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:13,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321827369] [2022-01-18 05:56:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:13,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:13,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321827369] [2022-01-18 05:56:13,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321827369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298996289] [2022-01-18 05:56:13,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:13,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:13,483 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) [2022-01-18 05:56:13,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 05:56:13,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 05:56:13,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:13,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:13,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:13,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298996289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:13,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:13,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:56:13,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285606768] [2022-01-18 05:56:13,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:13,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:56:13,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:13,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:56:13,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:56:13,926 INFO L87 Difference]: Start difference. First operand 49168 states and 181134 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:56:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:15,786 INFO L93 Difference]: Finished difference Result 64396 states and 235136 transitions. [2022-01-18 05:56:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:56:15,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 05:56:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:16,028 INFO L225 Difference]: With dead ends: 64396 [2022-01-18 05:56:16,028 INFO L226 Difference]: Without dead ends: 64052 [2022-01-18 05:56:16,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:56:16,029 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 335 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:16,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 200 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 715 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-01-18 05:56:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64052 states. [2022-01-18 05:56:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64052 to 49946. [2022-01-18 05:56:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49946 states, 49945 states have (on average 3.6853138452297527) internal successors, (184063), 49945 states have internal predecessors, (184063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49946 states to 49946 states and 184063 transitions. [2022-01-18 05:56:17,504 INFO L78 Accepts]: Start accepts. Automaton has 49946 states and 184063 transitions. Word has length 23 [2022-01-18 05:56:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:17,504 INFO L470 AbstractCegarLoop]: Abstraction has 49946 states and 184063 transitions. [2022-01-18 05:56:17,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:56:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49946 states and 184063 transitions. [2022-01-18 05:56:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:17,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:17,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:17,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 05:56:17,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:17,775 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash 498900542, now seen corresponding path program 19 times [2022-01-18 05:56:17,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:17,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139478882] [2022-01-18 05:56:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:17,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:17,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:17,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139478882] [2022-01-18 05:56:17,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139478882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077592378] [2022-01-18 05:56:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:17,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:17,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:17,861 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) [2022-01-18 05:56:17,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 05:56:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:18,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:18,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077592378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:18,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:18,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:56:18,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818643966] [2022-01-18 05:56:18,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:18,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:56:18,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:56:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:56:18,814 INFO L87 Difference]: Start difference. First operand 49946 states and 184063 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:20,872 INFO L93 Difference]: Finished difference Result 54689 states and 198839 transitions. [2022-01-18 05:56:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 05:56:20,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:21,060 INFO L225 Difference]: With dead ends: 54689 [2022-01-18 05:56:21,060 INFO L226 Difference]: Without dead ends: 54301 [2022-01-18 05:56:21,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=914, Invalid=2626, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:56:21,061 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 329 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:21,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 334 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 988 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-01-18 05:56:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54301 states. [2022-01-18 05:56:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54301 to 49927. [2022-01-18 05:56:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49927 states, 49926 states have (on average 3.6852341465368745) internal successors, (183989), 49926 states have internal predecessors, (183989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49927 states to 49927 states and 183989 transitions. [2022-01-18 05:56:22,966 INFO L78 Accepts]: Start accepts. Automaton has 49927 states and 183989 transitions. Word has length 23 [2022-01-18 05:56:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:22,966 INFO L470 AbstractCegarLoop]: Abstraction has 49927 states and 183989 transitions. [2022-01-18 05:56:22,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 49927 states and 183989 transitions. [2022-01-18 05:56:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:23,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:23,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:23,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 05:56:23,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:23,239 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -763955714, now seen corresponding path program 20 times [2022-01-18 05:56:23,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:23,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111766] [2022-01-18 05:56:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:23,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:23,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111766] [2022-01-18 05:56:23,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165032805] [2022-01-18 05:56:23,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:56:23,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:23,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:23,343 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) [2022-01-18 05:56:23,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 05:56:23,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:56:23,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:23,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:23,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165032805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:23,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:23,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:56:23,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665066376] [2022-01-18 05:56:23,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:23,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:56:23,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:56:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:56:23,794 INFO L87 Difference]: Start difference. First operand 49927 states and 183989 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:56:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:25,807 INFO L93 Difference]: Finished difference Result 52898 states and 192993 transitions. [2022-01-18 05:56:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 05:56:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 05:56:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:25,976 INFO L225 Difference]: With dead ends: 52898 [2022-01-18 05:56:25,976 INFO L226 Difference]: Without dead ends: 52535 [2022-01-18 05:56:25,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=613, Invalid=1937, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 05:56:25,977 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 245 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:25,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 302 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 929 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-01-18 05:56:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52535 states. [2022-01-18 05:56:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52535 to 50150. [2022-01-18 05:56:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50150 states, 50149 states have (on average 3.685397515404096) internal successors, (184819), 50149 states have internal predecessors, (184819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50150 states to 50150 states and 184819 transitions. [2022-01-18 05:56:27,285 INFO L78 Accepts]: Start accepts. Automaton has 50150 states and 184819 transitions. Word has length 23 [2022-01-18 05:56:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:27,285 INFO L470 AbstractCegarLoop]: Abstraction has 50150 states and 184819 transitions. [2022-01-18 05:56:27,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:56:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 50150 states and 184819 transitions. [2022-01-18 05:56:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:27,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:27,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:27,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:27,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:27,561 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1823119584, now seen corresponding path program 21 times [2022-01-18 05:56:27,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:27,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464355328] [2022-01-18 05:56:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:27,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:27,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:27,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464355328] [2022-01-18 05:56:27,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464355328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:27,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226007054] [2022-01-18 05:56:27,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:56:27,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:27,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:27,683 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) [2022-01-18 05:56:27,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 05:56:27,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:56:27,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:28,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226007054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:28,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:28,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:56:28,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93950469] [2022-01-18 05:56:28,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:28,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:56:28,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:56:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:56:28,153 INFO L87 Difference]: Start difference. First operand 50150 states and 184819 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:29,918 INFO L93 Difference]: Finished difference Result 64329 states and 235588 transitions. [2022-01-18 05:56:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:56:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:30,168 INFO L225 Difference]: With dead ends: 64329 [2022-01-18 05:56:30,168 INFO L226 Difference]: Without dead ends: 64063 [2022-01-18 05:56:30,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 05:56:30,169 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 213 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:30,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 305 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 921 Invalid, 0 Unknown, 129 Unchecked, 0.4s Time] [2022-01-18 05:56:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2022-01-18 05:56:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 50291. [2022-01-18 05:56:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50291 states, 50290 states have (on average 3.6863591171206997) internal successors, (185387), 50290 states have internal predecessors, (185387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 185387 transitions. [2022-01-18 05:56:31,730 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 185387 transitions. Word has length 23 [2022-01-18 05:56:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:31,730 INFO L470 AbstractCegarLoop]: Abstraction has 50291 states and 185387 transitions. [2022-01-18 05:56:31,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 185387 transitions. [2022-01-18 05:56:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:31,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:31,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:31,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 05:56:31,997 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,SelfDestructingSolverStorable62 [2022-01-18 05:56:31,997 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:31,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1052604350, now seen corresponding path program 22 times [2022-01-18 05:56:31,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:31,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758157834] [2022-01-18 05:56:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:31,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:32,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:32,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758157834] [2022-01-18 05:56:32,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758157834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:32,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763276393] [2022-01-18 05:56:32,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:56:32,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:32,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:32,113 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) [2022-01-18 05:56:32,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 05:56:32,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:56:32,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:32,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:32,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:32,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763276393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:32,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:32,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 05:56:32,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688639711] [2022-01-18 05:56:32,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:32,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:56:32,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:56:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:56:32,835 INFO L87 Difference]: Start difference. First operand 50291 states and 185387 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:56:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:34,246 INFO L93 Difference]: Finished difference Result 54198 states and 198484 transitions. [2022-01-18 05:56:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:56:34,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 23 [2022-01-18 05:56:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:34,409 INFO L225 Difference]: With dead ends: 54198 [2022-01-18 05:56:34,409 INFO L226 Difference]: Without dead ends: 53891 [2022-01-18 05:56:34,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=522, Invalid=1548, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:56:34,410 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 231 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:34,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 215 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 723 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-01-18 05:56:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53891 states. [2022-01-18 05:56:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53891 to 50627. [2022-01-18 05:56:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.6878876466637696) internal successors, (186703), 50626 states have internal predecessors, (186703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 186703 transitions. [2022-01-18 05:56:35,791 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 186703 transitions. Word has length 23 [2022-01-18 05:56:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 50627 states and 186703 transitions. [2022-01-18 05:56:35,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-01-18 05:56:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 186703 transitions. [2022-01-18 05:56:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:35,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:35,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:35,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:36,066 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,SelfDestructingSolverStorable63 [2022-01-18 05:56:36,066 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2111768220, now seen corresponding path program 23 times [2022-01-18 05:56:36,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:36,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888943872] [2022-01-18 05:56:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:36,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:36,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888943872] [2022-01-18 05:56:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888943872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132266125] [2022-01-18 05:56:36,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:56:36,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:36,480 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) [2022-01-18 05:56:36,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 05:56:36,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:56:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:36,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:36,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:36,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:37,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132266125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:37,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:37,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:56:37,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555456106] [2022-01-18 05:56:37,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:37,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:56:37,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:56:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:56:37,011 INFO L87 Difference]: Start difference. First operand 50627 states and 186703 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:38,175 INFO L93 Difference]: Finished difference Result 63055 states and 232764 transitions. [2022-01-18 05:56:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 05:56:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:38,430 INFO L225 Difference]: With dead ends: 63055 [2022-01-18 05:56:38,430 INFO L226 Difference]: Without dead ends: 62953 [2022-01-18 05:56:38,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 05:56:38,431 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:38,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 163 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 580 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-01-18 05:56:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62953 states. [2022-01-18 05:56:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62953 to 50622. [2022-01-18 05:56:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50622 states, 50621 states have (on average 3.687856818316509) internal successors, (186683), 50621 states have internal predecessors, (186683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50622 states to 50622 states and 186683 transitions. [2022-01-18 05:56:40,193 INFO L78 Accepts]: Start accepts. Automaton has 50622 states and 186683 transitions. Word has length 23 [2022-01-18 05:56:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 50622 states and 186683 transitions. [2022-01-18 05:56:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 50622 states and 186683 transitions. [2022-01-18 05:56:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:40,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:40,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:40,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 05:56:40,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:40,466 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash 365651024, now seen corresponding path program 24 times [2022-01-18 05:56:40,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:40,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13997759] [2022-01-18 05:56:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:40,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:40,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:40,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13997759] [2022-01-18 05:56:40,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13997759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:40,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173638975] [2022-01-18 05:56:40,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:40,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:40,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:40,532 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) [2022-01-18 05:56:40,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 05:56:40,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:56:40,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 05:56:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:40,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:40,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173638975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:40,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:40,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 05:56:40,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519851621] [2022-01-18 05:56:40,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:40,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:56:40,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:40,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:56:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:56:40,899 INFO L87 Difference]: Start difference. First operand 50622 states and 186683 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:42,607 INFO L93 Difference]: Finished difference Result 74584 states and 272486 transitions. [2022-01-18 05:56:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:56:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:42,853 INFO L225 Difference]: With dead ends: 74584 [2022-01-18 05:56:42,853 INFO L226 Difference]: Without dead ends: 74568 [2022-01-18 05:56:42,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=753, Invalid=3029, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 05:56:42,854 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 419 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:42,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 292 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:56:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74568 states. [2022-01-18 05:56:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74568 to 50705. [2022-01-18 05:56:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50705 states, 50704 states have (on average 3.688407226254339) internal successors, (187017), 50704 states have internal predecessors, (187017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50705 states to 50705 states and 187017 transitions. [2022-01-18 05:56:44,787 INFO L78 Accepts]: Start accepts. Automaton has 50705 states and 187017 transitions. Word has length 23 [2022-01-18 05:56:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:44,787 INFO L470 AbstractCegarLoop]: Abstraction has 50705 states and 187017 transitions. [2022-01-18 05:56:44,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 50705 states and 187017 transitions. [2022-01-18 05:56:44,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:44,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:44,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:44,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 05:56:45,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:45,071 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1122420986, now seen corresponding path program 25 times [2022-01-18 05:56:45,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:45,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645135997] [2022-01-18 05:56:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:45,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:45,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645135997] [2022-01-18 05:56:45,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645135997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133386582] [2022-01-18 05:56:45,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:45,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:45,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:45,207 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) [2022-01-18 05:56:45,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 05:56:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 05:56:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:45,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:45,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133386582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:45,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:45,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 05:56:45,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091054730] [2022-01-18 05:56:45,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:45,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:56:45,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:56:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:56:45,672 INFO L87 Difference]: Start difference. First operand 50705 states and 187017 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:46,499 INFO L93 Difference]: Finished difference Result 53238 states and 195578 transitions. [2022-01-18 05:56:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:56:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:47,092 INFO L225 Difference]: With dead ends: 53238 [2022-01-18 05:56:47,092 INFO L226 Difference]: Without dead ends: 53080 [2022-01-18 05:56:47,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-01-18 05:56:47,094 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:47,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 125 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 534 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-01-18 05:56:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53080 states. [2022-01-18 05:56:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53080 to 50820. [2022-01-18 05:56:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50820 states, 50819 states have (on average 3.6885023318050334) internal successors, (187446), 50819 states have internal predecessors, (187446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 187446 transitions. [2022-01-18 05:56:48,506 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 187446 transitions. Word has length 23 [2022-01-18 05:56:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:48,506 INFO L470 AbstractCegarLoop]: Abstraction has 50820 states and 187446 transitions. [2022-01-18 05:56:48,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 187446 transitions. [2022-01-18 05:56:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:48,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:48,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:48,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:48,780 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,SelfDestructingSolverStorable66 [2022-01-18 05:56:48,780 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1254398970, now seen corresponding path program 17 times [2022-01-18 05:56:48,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:48,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532694985] [2022-01-18 05:56:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:48,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:48,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532694985] [2022-01-18 05:56:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532694985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045649033] [2022-01-18 05:56:48,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:56:48,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:48,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:48,870 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) [2022-01-18 05:56:48,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 05:56:48,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:56:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:56:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:48,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:49,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045649033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:49,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:49,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-18 05:56:49,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121029664] [2022-01-18 05:56:49,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:49,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:56:49,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:56:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:56:49,124 INFO L87 Difference]: Start difference. First operand 50820 states and 187446 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:49,510 INFO L93 Difference]: Finished difference Result 51214 states and 188578 transitions. [2022-01-18 05:56:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:56:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:49,680 INFO L225 Difference]: With dead ends: 51214 [2022-01-18 05:56:49,680 INFO L226 Difference]: Without dead ends: 51141 [2022-01-18 05:56:49,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:56:49,681 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:49,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 218 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51141 states. [2022-01-18 05:56:50,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51141 to 50768. [2022-01-18 05:56:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50768 states, 50767 states have (on average 3.688262059999606) internal successors, (187242), 50767 states have internal predecessors, (187242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50768 states to 50768 states and 187242 transitions. [2022-01-18 05:56:51,418 INFO L78 Accepts]: Start accepts. Automaton has 50768 states and 187242 transitions. Word has length 23 [2022-01-18 05:56:51,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:51,418 INFO L470 AbstractCegarLoop]: Abstraction has 50768 states and 187242 transitions. [2022-01-18 05:56:51,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 50768 states and 187242 transitions. [2022-01-18 05:56:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:51,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:51,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:51,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:51,700 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,SelfDestructingSolverStorable67 [2022-01-18 05:56:51,700 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash -97569618, now seen corresponding path program 18 times [2022-01-18 05:56:51,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:51,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633631357] [2022-01-18 05:56:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:51,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:51,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:51,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633631357] [2022-01-18 05:56:51,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633631357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397634193] [2022-01-18 05:56:51,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:56:51,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:51,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:51,759 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) [2022-01-18 05:56:51,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 05:56:51,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:56:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:56:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:56:51,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:56:52,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397634193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:52,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:52,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 10 [2022-01-18 05:56:52,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562584789] [2022-01-18 05:56:52,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:52,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:56:52,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:56:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:56:52,027 INFO L87 Difference]: Start difference. First operand 50768 states and 187242 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:52,504 INFO L93 Difference]: Finished difference Result 51568 states and 189738 transitions. [2022-01-18 05:56:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:56:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:52,712 INFO L225 Difference]: With dead ends: 51568 [2022-01-18 05:56:52,712 INFO L226 Difference]: Without dead ends: 51449 [2022-01-18 05:56:52,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:56:52,712 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:52,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 188 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51449 states. [2022-01-18 05:56:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51449 to 51115. [2022-01-18 05:56:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51115 states, 51114 states have (on average 3.6864068552647025) internal successors, (188427), 51114 states have internal predecessors, (188427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51115 states to 51115 states and 188427 transitions. [2022-01-18 05:56:54,069 INFO L78 Accepts]: Start accepts. Automaton has 51115 states and 188427 transitions. Word has length 23 [2022-01-18 05:56:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:54,069 INFO L470 AbstractCegarLoop]: Abstraction has 51115 states and 188427 transitions. [2022-01-18 05:56:54,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51115 states and 188427 transitions. [2022-01-18 05:56:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:54,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:54,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:54,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:54,331 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1949809626, now seen corresponding path program 19 times [2022-01-18 05:56:54,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:54,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634544076] [2022-01-18 05:56:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:54,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:54,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:54,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634544076] [2022-01-18 05:56:54,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634544076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:54,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092941151] [2022-01-18 05:56:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:56:54,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:54,411 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) [2022-01-18 05:56:54,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 05:56:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:54,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:56:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:54,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:54,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092941151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:54,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:54,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-01-18 05:56:54,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733597102] [2022-01-18 05:56:54,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:54,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:56:54,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:56:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:56:54,654 INFO L87 Difference]: Start difference. First operand 51115 states and 188427 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:55,325 INFO L93 Difference]: Finished difference Result 51903 states and 190754 transitions. [2022-01-18 05:56:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:56:55,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:55,511 INFO L225 Difference]: With dead ends: 51903 [2022-01-18 05:56:55,511 INFO L226 Difference]: Without dead ends: 51757 [2022-01-18 05:56:55,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:56:55,511 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 50 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:55,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 285 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51757 states. [2022-01-18 05:56:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51757 to 51285. [2022-01-18 05:56:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51285 states, 51284 states have (on average 3.6865884096404336) internal successors, (189063), 51284 states have internal predecessors, (189063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51285 states to 51285 states and 189063 transitions. [2022-01-18 05:56:56,924 INFO L78 Accepts]: Start accepts. Automaton has 51285 states and 189063 transitions. Word has length 23 [2022-01-18 05:56:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:56:56,925 INFO L470 AbstractCegarLoop]: Abstraction has 51285 states and 189063 transitions. [2022-01-18 05:56:56,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 51285 states and 189063 transitions. [2022-01-18 05:56:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:56:57,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:56:57,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:56:57,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 05:56:57,201 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,SelfDestructingSolverStorable69 [2022-01-18 05:56:57,201 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:56:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:56:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1845249086, now seen corresponding path program 20 times [2022-01-18 05:56:57,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:56:57,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927573908] [2022-01-18 05:56:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:56:57,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:56:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:56:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:56:57,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:56:57,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927573908] [2022-01-18 05:56:57,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927573908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:56:57,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79682506] [2022-01-18 05:56:57,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:56:57,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:56:57,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:56:57,286 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) [2022-01-18 05:56:57,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 05:56:57,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:56:57,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:56:57,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:56:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:56:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:56:57,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:56:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:56:57,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79682506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:56:57,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:56:57,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-18 05:56:57,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467426170] [2022-01-18 05:56:57,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:56:57,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:56:57,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:56:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:56:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:56:57,534 INFO L87 Difference]: Start difference. First operand 51285 states and 189063 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:56:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:56:57,987 INFO L93 Difference]: Finished difference Result 51877 states and 190892 transitions. [2022-01-18 05:56:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:56:57,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:56:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:56:58,549 INFO L225 Difference]: With dead ends: 51877 [2022-01-18 05:56:58,549 INFO L226 Difference]: Without dead ends: 51783 [2022-01-18 05:56:58,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:56:58,550 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 77 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:56:58,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 304 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:56:58,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51783 states. [2022-01-18 05:56:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51783 to 51526. [2022-01-18 05:56:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51526 states, 51525 states have (on average 3.6843085880640465) internal successors, (189834), 51525 states have internal predecessors, (189834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51526 states to 51526 states and 189834 transitions. [2022-01-18 05:57:00,098 INFO L78 Accepts]: Start accepts. Automaton has 51526 states and 189834 transitions. Word has length 23 [2022-01-18 05:57:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:00,098 INFO L470 AbstractCegarLoop]: Abstraction has 51526 states and 189834 transitions. [2022-01-18 05:57:00,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 51526 states and 189834 transitions. [2022-01-18 05:57:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:57:00,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:00,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:00,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:00,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:00,369 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:00,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1982895082, now seen corresponding path program 21 times [2022-01-18 05:57:00,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:00,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463009329] [2022-01-18 05:57:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:00,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:00,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:00,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463009329] [2022-01-18 05:57:00,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463009329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:00,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727714935] [2022-01-18 05:57:00,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:00,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:00,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:00,429 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) [2022-01-18 05:57:00,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 05:57:00,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:57:00,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:00,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:57:00,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:57:00,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:57:00,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727714935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:00,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:00,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-18 05:57:00,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467376237] [2022-01-18 05:57:00,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:00,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:57:00,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:57:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:57:00,590 INFO L87 Difference]: Start difference. First operand 51526 states and 189834 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2022-01-18 05:57:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:01,016 INFO L93 Difference]: Finished difference Result 52407 states and 192327 transitions. [2022-01-18 05:57:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:57:01,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:57:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:01,203 INFO L225 Difference]: With dead ends: 52407 [2022-01-18 05:57:01,203 INFO L226 Difference]: Without dead ends: 52346 [2022-01-18 05:57:01,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:57:01,204 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 91 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:01,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 262 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:57:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52346 states. [2022-01-18 05:57:02,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52346 to 51817. [2022-01-18 05:57:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51817 states, 51816 states have (on average 3.6825304925119653) internal successors, (190814), 51816 states have internal predecessors, (190814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51817 states to 51817 states and 190814 transitions. [2022-01-18 05:57:02,622 INFO L78 Accepts]: Start accepts. Automaton has 51817 states and 190814 transitions. Word has length 23 [2022-01-18 05:57:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:02,623 INFO L470 AbstractCegarLoop]: Abstraction has 51817 states and 190814 transitions. [2022-01-18 05:57:02,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2022-01-18 05:57:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 51817 states and 190814 transitions. [2022-01-18 05:57:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:57:02,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:02,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:02,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:02,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:02,903 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:02,903 INFO L85 PathProgramCache]: Analyzing trace with hash 759447458, now seen corresponding path program 26 times [2022-01-18 05:57:02,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:02,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197100581] [2022-01-18 05:57:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:02,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:02,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:02,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197100581] [2022-01-18 05:57:02,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197100581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:02,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367845235] [2022-01-18 05:57:02,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:57:02,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:02,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:02,937 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) [2022-01-18 05:57:02,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 05:57:02,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:57:02,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:57:02,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:03,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:03,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367845235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:03,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:03,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-01-18 05:57:03,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508151318] [2022-01-18 05:57:03,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:03,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:57:03,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:57:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:57:03,120 INFO L87 Difference]: Start difference. First operand 51817 states and 190814 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-01-18 05:57:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:04,557 INFO L93 Difference]: Finished difference Result 149980 states and 550232 transitions. [2022-01-18 05:57:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 05:57:04,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 23 [2022-01-18 05:57:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:05,624 INFO L225 Difference]: With dead ends: 149980 [2022-01-18 05:57:05,624 INFO L226 Difference]: Without dead ends: 149950 [2022-01-18 05:57:05,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2022-01-18 05:57:05,625 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 206 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:05,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 146 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149950 states. [2022-01-18 05:57:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149950 to 74032. [2022-01-18 05:57:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74032 states, 74031 states have (on average 3.695762585943726) internal successors, (273601), 74031 states have internal predecessors, (273601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74032 states to 74032 states and 273601 transitions. [2022-01-18 05:57:08,764 INFO L78 Accepts]: Start accepts. Automaton has 74032 states and 273601 transitions. Word has length 23 [2022-01-18 05:57:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:08,764 INFO L470 AbstractCegarLoop]: Abstraction has 74032 states and 273601 transitions. [2022-01-18 05:57:08,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-01-18 05:57:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 74032 states and 273601 transitions. [2022-01-18 05:57:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:57:08,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:08,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:08,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:09,060 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,SelfDestructingSolverStorable72 [2022-01-18 05:57:09,060 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1245251562, now seen corresponding path program 27 times [2022-01-18 05:57:09,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240953560] [2022-01-18 05:57:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:09,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:09,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:09,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240953560] [2022-01-18 05:57:09,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240953560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:09,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529152768] [2022-01-18 05:57:09,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:09,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:09,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:09,104 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) [2022-01-18 05:57:09,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 05:57:09,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:57:09,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 05:57:09,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:09,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:09,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529152768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:09,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:09,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-01-18 05:57:09,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214127503] [2022-01-18 05:57:09,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:09,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:57:09,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:57:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:57:09,311 INFO L87 Difference]: Start difference. First operand 74032 states and 273601 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-01-18 05:57:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:11,000 INFO L93 Difference]: Finished difference Result 158003 states and 582353 transitions. [2022-01-18 05:57:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:57:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 23 [2022-01-18 05:57:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:11,700 INFO L225 Difference]: With dead ends: 158003 [2022-01-18 05:57:11,700 INFO L226 Difference]: Without dead ends: 158003 [2022-01-18 05:57:11,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:57:11,700 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 219 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:11,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 62 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158003 states. [2022-01-18 05:57:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158003 to 98285. [2022-01-18 05:57:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98285 states, 98284 states have (on average 3.7211753693378373) internal successors, (365732), 98284 states have internal predecessors, (365732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98285 states to 98285 states and 365732 transitions. [2022-01-18 05:57:15,166 INFO L78 Accepts]: Start accepts. Automaton has 98285 states and 365732 transitions. Word has length 23 [2022-01-18 05:57:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:15,167 INFO L470 AbstractCegarLoop]: Abstraction has 98285 states and 365732 transitions. [2022-01-18 05:57:15,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-01-18 05:57:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 98285 states and 365732 transitions. [2022-01-18 05:57:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 05:57:15,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:15,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:15,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:15,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:15,980 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1186532844, now seen corresponding path program 22 times [2022-01-18 05:57:15,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:15,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896851431] [2022-01-18 05:57:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:15,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:16,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896851431] [2022-01-18 05:57:16,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896851431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650853334] [2022-01-18 05:57:16,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:57:16,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:16,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:16,055 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) [2022-01-18 05:57:16,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 05:57:16,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:57:16,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:16,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 05:57:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:16,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:16,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650853334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:16,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:16,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-01-18 05:57:16,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81064744] [2022-01-18 05:57:16,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:16,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:57:16,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:57:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:57:16,255 INFO L87 Difference]: Start difference. First operand 98285 states and 365732 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:16,950 INFO L93 Difference]: Finished difference Result 99056 states and 368040 transitions. [2022-01-18 05:57:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:57:16,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 05:57:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:17,371 INFO L225 Difference]: With dead ends: 99056 [2022-01-18 05:57:17,372 INFO L226 Difference]: Without dead ends: 98998 [2022-01-18 05:57:17,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:57:17,372 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:17,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 227 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:57:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98998 states. [2022-01-18 05:57:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98998 to 98589. [2022-01-18 05:57:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98589 states, 98588 states have (on average 3.7205745121110074) internal successors, (366804), 98588 states have internal predecessors, (366804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98589 states to 98589 states and 366804 transitions. [2022-01-18 05:57:21,106 INFO L78 Accepts]: Start accepts. Automaton has 98589 states and 366804 transitions. Word has length 23 [2022-01-18 05:57:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:21,107 INFO L470 AbstractCegarLoop]: Abstraction has 98589 states and 366804 transitions. [2022-01-18 05:57:21,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 98589 states and 366804 transitions. [2022-01-18 05:57:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:21,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:21,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:21,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:21,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:21,523 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 786212196, now seen corresponding path program 28 times [2022-01-18 05:57:21,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:21,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734010240] [2022-01-18 05:57:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:21,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:21,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:21,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734010240] [2022-01-18 05:57:21,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734010240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:21,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066404340] [2022-01-18 05:57:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:57:21,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:21,677 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) [2022-01-18 05:57:21,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 05:57:21,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:57:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:57:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:21,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:22,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066404340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:22,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:22,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 05:57:22,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706635944] [2022-01-18 05:57:22,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:22,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:57:22,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:22,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:57:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:57:22,004 INFO L87 Difference]: Start difference. First operand 98589 states and 366804 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:23,364 INFO L93 Difference]: Finished difference Result 99789 states and 370318 transitions. [2022-01-18 05:57:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:57:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:57:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:23,827 INFO L225 Difference]: With dead ends: 99789 [2022-01-18 05:57:23,827 INFO L226 Difference]: Without dead ends: 99743 [2022-01-18 05:57:23,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:57:23,827 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 109 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:23,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 490 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:57:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99743 states. [2022-01-18 05:57:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99743 to 99080. [2022-01-18 05:57:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99080 states, 99079 states have (on average 3.7192139605769134) internal successors, (368496), 99079 states have internal predecessors, (368496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99080 states to 99080 states and 368496 transitions. [2022-01-18 05:57:26,776 INFO L78 Accepts]: Start accepts. Automaton has 99080 states and 368496 transitions. Word has length 25 [2022-01-18 05:57:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:26,776 INFO L470 AbstractCegarLoop]: Abstraction has 99080 states and 368496 transitions. [2022-01-18 05:57:26,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand 99080 states and 368496 transitions. [2022-01-18 05:57:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:26,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:26,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:26,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:27,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:27,121 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash -94226864, now seen corresponding path program 29 times [2022-01-18 05:57:27,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:27,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938601148] [2022-01-18 05:57:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:27,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:27,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:27,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938601148] [2022-01-18 05:57:27,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938601148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:27,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045100474] [2022-01-18 05:57:27,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:57:27,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:27,196 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) [2022-01-18 05:57:27,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 05:57:27,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 05:57:27,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:27,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:57:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:27,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:27,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045100474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:27,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:27,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 05:57:27,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344860634] [2022-01-18 05:57:27,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:27,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:57:27,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:57:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:57:27,435 INFO L87 Difference]: Start difference. First operand 99080 states and 368496 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:28,742 INFO L93 Difference]: Finished difference Result 101021 states and 374921 transitions. [2022-01-18 05:57:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:57:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:57:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:29,252 INFO L225 Difference]: With dead ends: 101021 [2022-01-18 05:57:29,253 INFO L226 Difference]: Without dead ends: 100948 [2022-01-18 05:57:29,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:57:29,253 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:29,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 447 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100948 states. [2022-01-18 05:57:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100948 to 100006. [2022-01-18 05:57:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100006 states, 100005 states have (on average 3.7180740962951853) internal successors, (371826), 100005 states have internal predecessors, (371826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100006 states to 100006 states and 371826 transitions. [2022-01-18 05:57:32,207 INFO L78 Accepts]: Start accepts. Automaton has 100006 states and 371826 transitions. Word has length 25 [2022-01-18 05:57:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:32,207 INFO L470 AbstractCegarLoop]: Abstraction has 100006 states and 371826 transitions. [2022-01-18 05:57:32,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 100006 states and 371826 transitions. [2022-01-18 05:57:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:32,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:32,357 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:32,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:32,558 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,SelfDestructingSolverStorable76 [2022-01-18 05:57:32,558 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:32,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1627658808, now seen corresponding path program 30 times [2022-01-18 05:57:32,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:32,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371980321] [2022-01-18 05:57:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:32,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:32,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:32,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371980321] [2022-01-18 05:57:32,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371980321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:32,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070297954] [2022-01-18 05:57:32,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:57:32,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:32,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:32,643 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) [2022-01-18 05:57:32,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 05:57:32,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 05:57:32,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:32,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:57:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:32,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070297954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:32,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-01-18 05:57:32,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502261820] [2022-01-18 05:57:32,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:32,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:57:32,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:57:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:57:32,862 INFO L87 Difference]: Start difference. First operand 100006 states and 371826 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:34,268 INFO L93 Difference]: Finished difference Result 101212 states and 375366 transitions. [2022-01-18 05:57:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:57:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:57:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:34,762 INFO L225 Difference]: With dead ends: 101212 [2022-01-18 05:57:34,762 INFO L226 Difference]: Without dead ends: 101187 [2022-01-18 05:57:34,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:57:34,762 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 98 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:34,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 456 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101187 states. [2022-01-18 05:57:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101187 to 100410. [2022-01-18 05:57:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100410 states, 100409 states have (on average 3.7174556065691324) internal successors, (373266), 100409 states have internal predecessors, (373266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100410 states to 100410 states and 373266 transitions. [2022-01-18 05:57:37,836 INFO L78 Accepts]: Start accepts. Automaton has 100410 states and 373266 transitions. Word has length 25 [2022-01-18 05:57:37,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:37,837 INFO L470 AbstractCegarLoop]: Abstraction has 100410 states and 373266 transitions. [2022-01-18 05:57:37,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 100410 states and 373266 transitions. [2022-01-18 05:57:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:38,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:38,003 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:38,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:38,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:38,203 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1624702482, now seen corresponding path program 31 times [2022-01-18 05:57:38,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557983036] [2022-01-18 05:57:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:38,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:38,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:38,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557983036] [2022-01-18 05:57:38,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557983036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:38,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472564877] [2022-01-18 05:57:38,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:57:38,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:38,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:38,290 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) [2022-01-18 05:57:38,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 05:57:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:57:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:38,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:38,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472564877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:38,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:38,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-01-18 05:57:38,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846072614] [2022-01-18 05:57:38,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:38,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:57:38,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:57:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:57:38,533 INFO L87 Difference]: Start difference. First operand 100410 states and 373266 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-01-18 05:57:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:39,800 INFO L93 Difference]: Finished difference Result 101635 states and 376817 transitions. [2022-01-18 05:57:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:57:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2022-01-18 05:57:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:40,269 INFO L225 Difference]: With dead ends: 101635 [2022-01-18 05:57:40,269 INFO L226 Difference]: Without dead ends: 101562 [2022-01-18 05:57:40,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:57:40,269 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 75 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:40,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 341 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:57:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101562 states. [2022-01-18 05:57:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101562 to 100619. [2022-01-18 05:57:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100619 states, 100618 states have (on average 3.7178238486155557) internal successors, (374080), 100618 states have internal predecessors, (374080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100619 states to 100619 states and 374080 transitions. [2022-01-18 05:57:43,284 INFO L78 Accepts]: Start accepts. Automaton has 100619 states and 374080 transitions. Word has length 25 [2022-01-18 05:57:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:43,284 INFO L470 AbstractCegarLoop]: Abstraction has 100619 states and 374080 transitions. [2022-01-18 05:57:43,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-01-18 05:57:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 100619 states and 374080 transitions. [2022-01-18 05:57:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:43,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:43,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:43,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:43,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:43,640 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1401888858, now seen corresponding path program 32 times [2022-01-18 05:57:43,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:43,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032321968] [2022-01-18 05:57:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:43,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:57:43,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032321968] [2022-01-18 05:57:43,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032321968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884710507] [2022-01-18 05:57:43,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:57:43,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:43,733 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) [2022-01-18 05:57:43,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 05:57:43,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:57:43,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:57:43,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:57:43,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:57:44,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884710507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:44,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:44,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-18 05:57:44,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76009282] [2022-01-18 05:57:44,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:44,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:57:44,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:57:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:57:44,001 INFO L87 Difference]: Start difference. First operand 100619 states and 374080 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-01-18 05:57:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:45,338 INFO L93 Difference]: Finished difference Result 102353 states and 379262 transitions. [2022-01-18 05:57:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:57:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2022-01-18 05:57:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:45,770 INFO L225 Difference]: With dead ends: 102353 [2022-01-18 05:57:45,770 INFO L226 Difference]: Without dead ends: 102254 [2022-01-18 05:57:45,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:57:45,770 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 88 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:45,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 377 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102254 states. [2022-01-18 05:57:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102254 to 100990. [2022-01-18 05:57:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100990 states, 100989 states have (on average 3.7180088920575507) internal successors, (375478), 100989 states have internal predecessors, (375478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100990 states to 100990 states and 375478 transitions. [2022-01-18 05:57:48,826 INFO L78 Accepts]: Start accepts. Automaton has 100990 states and 375478 transitions. Word has length 25 [2022-01-18 05:57:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:48,826 INFO L470 AbstractCegarLoop]: Abstraction has 100990 states and 375478 transitions. [2022-01-18 05:57:48,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-01-18 05:57:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 100990 states and 375478 transitions. [2022-01-18 05:57:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:48,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:48,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:48,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:49,179 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,SelfDestructingSolverStorable79 [2022-01-18 05:57:49,179 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -195414166, now seen corresponding path program 33 times [2022-01-18 05:57:49,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:49,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391547558] [2022-01-18 05:57:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:49,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:49,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:49,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391547558] [2022-01-18 05:57:49,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391547558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:49,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769531074] [2022-01-18 05:57:49,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:49,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:49,261 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) [2022-01-18 05:57:49,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 05:57:49,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 05:57:49,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:57:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:49,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:49,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769531074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:49,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:49,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 05:57:49,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489619764] [2022-01-18 05:57:49,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:49,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:57:49,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:57:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:57:49,488 INFO L87 Difference]: Start difference. First operand 100990 states and 375478 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:50,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:50,871 INFO L93 Difference]: Finished difference Result 104802 states and 388036 transitions. [2022-01-18 05:57:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 05:57:50,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:57:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:57:51,348 INFO L225 Difference]: With dead ends: 104802 [2022-01-18 05:57:51,349 INFO L226 Difference]: Without dead ends: 104702 [2022-01-18 05:57:51,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:57:51,349 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 107 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:57:51,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 419 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:57:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104702 states. [2022-01-18 05:57:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104702 to 102377. [2022-01-18 05:57:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102377 states, 102376 states have (on average 3.716349535047277) internal successors, (380465), 102376 states have internal predecessors, (380465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102377 states to 102377 states and 380465 transitions. [2022-01-18 05:57:54,530 INFO L78 Accepts]: Start accepts. Automaton has 102377 states and 380465 transitions. Word has length 25 [2022-01-18 05:57:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:57:54,531 INFO L470 AbstractCegarLoop]: Abstraction has 102377 states and 380465 transitions. [2022-01-18 05:57:54,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:57:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 102377 states and 380465 transitions. [2022-01-18 05:57:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:57:54,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:57:54,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:57:54,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 05:57:54,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:54,900 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:57:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:57:54,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1981712050, now seen corresponding path program 21 times [2022-01-18 05:57:54,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:57:54,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824645102] [2022-01-18 05:57:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:57:54,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:57:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:57:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:54,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:57:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824645102] [2022-01-18 05:57:54,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824645102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:57:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292787938] [2022-01-18 05:57:54,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:57:54,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:57:54,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:57:54,945 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) [2022-01-18 05:57:54,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 05:57:54,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 05:57:54,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:57:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:57:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:57:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:55,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:57:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:57:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292787938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:57:55,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:57:55,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-01-18 05:57:55,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324446429] [2022-01-18 05:57:55,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:57:55,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:57:55,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:57:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:57:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:57:55,198 INFO L87 Difference]: Start difference. First operand 102377 states and 380465 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) [2022-01-18 05:57:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:57:58,720 INFO L93 Difference]: Finished difference Result 276637 states and 1019556 transitions. [2022-01-18 05:57:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 05:57:58,720 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 25 [2022-01-18 05:57:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:00,107 INFO L225 Difference]: With dead ends: 276637 [2022-01-18 05:58:00,107 INFO L226 Difference]: Without dead ends: 276621 [2022-01-18 05:58:00,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=639, Invalid=1341, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 05:58:00,108 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 532 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:00,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 135 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 05:58:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276621 states. [2022-01-18 05:58:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276621 to 204366. [2022-01-18 05:58:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204366 states, 204365 states have (on average 3.7172901426369487) internal successors, (759684), 204365 states have internal predecessors, (759684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204366 states to 204366 states and 759684 transitions. [2022-01-18 05:58:09,330 INFO L78 Accepts]: Start accepts. Automaton has 204366 states and 759684 transitions. Word has length 25 [2022-01-18 05:58:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:09,330 INFO L470 AbstractCegarLoop]: Abstraction has 204366 states and 759684 transitions. [2022-01-18 05:58:09,330 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) [2022-01-18 05:58:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 204366 states and 759684 transitions. [2022-01-18 05:58:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:58:09,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:09,632 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:09,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:09,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:09,832 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:58:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:09,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1495907946, now seen corresponding path program 22 times [2022-01-18 05:58:09,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:09,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391525774] [2022-01-18 05:58:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:09,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:09,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:09,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391525774] [2022-01-18 05:58:09,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391525774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:09,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945583624] [2022-01-18 05:58:09,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:58:09,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:09,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:09,873 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) [2022-01-18 05:58:09,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 05:58:09,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:58:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:58:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:09,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:10,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945583624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:10,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:10,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-01-18 05:58:10,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336024476] [2022-01-18 05:58:10,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:10,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:58:10,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:58:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:58:10,095 INFO L87 Difference]: Start difference. First operand 204366 states and 759684 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) [2022-01-18 05:58:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:14,949 INFO L93 Difference]: Finished difference Result 450253 states and 1667299 transitions. [2022-01-18 05:58:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:58:14,950 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 25 [2022-01-18 05:58:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:18,315 INFO L225 Difference]: With dead ends: 450253 [2022-01-18 05:58:18,315 INFO L226 Difference]: Without dead ends: 450253 [2022-01-18 05:58:18,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 05:58:18,316 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 250 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:18,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 90 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:58:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450253 states. [2022-01-18 05:58:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450253 to 286637. [2022-01-18 05:58:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286637 states, 286636 states have (on average 3.705075426673551) internal successors, (1062008), 286636 states have internal predecessors, (1062008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286637 states to 286637 states and 1062008 transitions. [2022-01-18 05:58:30,737 INFO L78 Accepts]: Start accepts. Automaton has 286637 states and 1062008 transitions. Word has length 25 [2022-01-18 05:58:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:30,737 INFO L470 AbstractCegarLoop]: Abstraction has 286637 states and 1062008 transitions. [2022-01-18 05:58:30,738 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) [2022-01-18 05:58:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 286637 states and 1062008 transitions. [2022-01-18 05:58:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:58:31,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:31,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:31,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:31,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:31,279 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:58:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1886312940, now seen corresponding path program 34 times [2022-01-18 05:58:31,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243685156] [2022-01-18 05:58:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:31,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:31,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243685156] [2022-01-18 05:58:31,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243685156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097993698] [2022-01-18 05:58:31,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:58:31,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:31,395 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) [2022-01-18 05:58:31,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 05:58:31,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:58:31,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:31,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:58:31,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:31,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:31,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097993698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:31,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:31,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:58:31,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965486035] [2022-01-18 05:58:31,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:31,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:58:31,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:58:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:58:31,942 INFO L87 Difference]: Start difference. First operand 286637 states and 1062008 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:37,465 INFO L93 Difference]: Finished difference Result 291437 states and 1076297 transitions. [2022-01-18 05:58:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 05:58:37,466 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:58:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:40,341 INFO L225 Difference]: With dead ends: 291437 [2022-01-18 05:58:40,341 INFO L226 Difference]: Without dead ends: 290870 [2022-01-18 05:58:40,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1066, Invalid=4786, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 05:58:40,343 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 312 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:40,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 440 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 05:58:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290870 states. [2022-01-18 05:58:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290870 to 287839. [2022-01-18 05:58:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287839 states, 287838 states have (on average 3.7038473029968246) internal successors, (1066108), 287838 states have internal predecessors, (1066108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287839 states to 287839 states and 1066108 transitions. [2022-01-18 05:58:51,321 INFO L78 Accepts]: Start accepts. Automaton has 287839 states and 1066108 transitions. Word has length 25 [2022-01-18 05:58:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:58:51,322 INFO L470 AbstractCegarLoop]: Abstraction has 287839 states and 1066108 transitions. [2022-01-18 05:58:51,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 287839 states and 1066108 transitions. [2022-01-18 05:58:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:58:51,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:58:51,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:58:51,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 05:58:51,850 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,SelfDestructingSolverStorable83 [2022-01-18 05:58:51,850 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:58:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:58:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1438054580, now seen corresponding path program 35 times [2022-01-18 05:58:51,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:58:51,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647309851] [2022-01-18 05:58:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:58:51,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:58:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:58:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:51,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:58:51,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647309851] [2022-01-18 05:58:51,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647309851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:58:51,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719410092] [2022-01-18 05:58:51,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:58:51,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:58:51,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:58:51,935 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) [2022-01-18 05:58:51,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 05:58:51,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:58:51,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:58:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:58:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:58:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:52,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:58:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:58:52,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719410092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:58:52,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:58:52,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:58:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562990403] [2022-01-18 05:58:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:58:52,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:58:52,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:58:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:58:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:58:52,385 INFO L87 Difference]: Start difference. First operand 287839 states and 1066108 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:58:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:58:57,209 INFO L93 Difference]: Finished difference Result 292124 states and 1079217 transitions. [2022-01-18 05:58:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 05:58:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:58:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:58:58,677 INFO L225 Difference]: With dead ends: 292124 [2022-01-18 05:58:58,678 INFO L226 Difference]: Without dead ends: 291998 [2022-01-18 05:58:58,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=589, Invalid=2833, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 05:58:58,678 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 233 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:58:58,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 295 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 05:58:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291998 states. [2022-01-18 05:59:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291998 to 288449. [2022-01-18 05:59:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288449 states, 288448 states have (on average 3.703249805857555) internal successors, (1068195), 288448 states have internal predecessors, (1068195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288449 states to 288449 states and 1068195 transitions. [2022-01-18 05:59:08,901 INFO L78 Accepts]: Start accepts. Automaton has 288449 states and 1068195 transitions. Word has length 25 [2022-01-18 05:59:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:08,901 INFO L470 AbstractCegarLoop]: Abstraction has 288449 states and 1068195 transitions. [2022-01-18 05:59:08,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 288449 states and 1068195 transitions. [2022-01-18 05:59:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:59:10,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:10,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:10,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:10,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:10,334 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:59:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1941831228, now seen corresponding path program 36 times [2022-01-18 05:59:10,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:10,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132363567] [2022-01-18 05:59:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:10,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:10,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132363567] [2022-01-18 05:59:10,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132363567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395833039] [2022-01-18 05:59:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:59:10,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:10,434 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) [2022-01-18 05:59:10,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 05:59:10,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 05:59:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:59:10,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:10,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395833039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:10,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:10,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:59:10,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190073304] [2022-01-18 05:59:10,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:10,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:59:10,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:10,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:59:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:59:10,821 INFO L87 Difference]: Start difference. First operand 288449 states and 1068195 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) [2022-01-18 05:59:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:14,947 INFO L93 Difference]: Finished difference Result 294813 states and 1088732 transitions. [2022-01-18 05:59:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 05:59:14,947 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 25 [2022-01-18 05:59:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:17,319 INFO L225 Difference]: With dead ends: 294813 [2022-01-18 05:59:17,319 INFO L226 Difference]: Without dead ends: 294328 [2022-01-18 05:59:17,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=3261, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 05:59:17,320 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 272 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:17,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 356 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 05:59:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294328 states. [2022-01-18 05:59:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294328 to 289983. [2022-01-18 05:59:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289983 states, 289982 states have (on average 3.7032298556462124) internal successors, (1073870), 289982 states have internal predecessors, (1073870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289983 states to 289983 states and 1073870 transitions. [2022-01-18 05:59:27,853 INFO L78 Accepts]: Start accepts. Automaton has 289983 states and 1073870 transitions. Word has length 25 [2022-01-18 05:59:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:27,854 INFO L470 AbstractCegarLoop]: Abstraction has 289983 states and 1073870 transitions. [2022-01-18 05:59:27,854 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) [2022-01-18 05:59:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 289983 states and 1073870 transitions. [2022-01-18 05:59:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:59:28,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:28,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:28,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 05:59:28,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:28,379 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:59:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1014514812, now seen corresponding path program 37 times [2022-01-18 05:59:28,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:28,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573153982] [2022-01-18 05:59:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:28,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:28,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573153982] [2022-01-18 05:59:28,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573153982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311631835] [2022-01-18 05:59:28,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:59:28,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:28,465 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) [2022-01-18 05:59:28,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 05:59:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:28,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:59:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:28,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:28,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311631835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:28,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:28,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:59:28,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486554361] [2022-01-18 05:59:28,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:28,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:59:28,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:59:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:59:28,890 INFO L87 Difference]: Start difference. First operand 289983 states and 1073870 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2022-01-18 05:59:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:33,093 INFO L93 Difference]: Finished difference Result 292093 states and 1079963 transitions. [2022-01-18 05:59:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 05:59:33,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 25 [2022-01-18 05:59:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:34,580 INFO L225 Difference]: With dead ends: 292093 [2022-01-18 05:59:34,580 INFO L226 Difference]: Without dead ends: 292068 [2022-01-18 05:59:34,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 05:59:34,581 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 259 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:34,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 329 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 05:59:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292068 states. [2022-01-18 05:59:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292068 to 290104. [2022-01-18 05:59:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290104 states, 290103 states have (on average 3.703291589538888) internal successors, (1074336), 290103 states have internal predecessors, (1074336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290104 states to 290104 states and 1074336 transitions. [2022-01-18 05:59:45,485 INFO L78 Accepts]: Start accepts. Automaton has 290104 states and 1074336 transitions. Word has length 25 [2022-01-18 05:59:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:59:45,485 INFO L470 AbstractCegarLoop]: Abstraction has 290104 states and 1074336 transitions. [2022-01-18 05:59:45,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2022-01-18 05:59:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 290104 states and 1074336 transitions. [2022-01-18 05:59:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 05:59:45,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:59:45,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:59:45,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 05:59:46,037 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,SelfDestructingSolverStorable86 [2022-01-18 05:59:46,037 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:59:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:59:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 279299422, now seen corresponding path program 38 times [2022-01-18 05:59:46,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:59:46,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188811456] [2022-01-18 05:59:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:59:46,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:59:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:59:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:46,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:59:46,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188811456] [2022-01-18 05:59:46,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188811456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:59:46,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069568904] [2022-01-18 05:59:46,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:59:46,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:59:46,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:59:46,155 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) [2022-01-18 05:59:46,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 05:59:46,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:59:46,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:59:46,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 05:59:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:59:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:46,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:59:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:59:46,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069568904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:59:46,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:59:46,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:59:46,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840862368] [2022-01-18 05:59:46,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:59:46,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:59:46,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:59:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:59:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:59:46,701 INFO L87 Difference]: Start difference. First operand 290104 states and 1074336 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:59:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:59:52,496 INFO L93 Difference]: Finished difference Result 294291 states and 1087343 transitions. [2022-01-18 05:59:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 05:59:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 05:59:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:59:55,144 INFO L225 Difference]: With dead ends: 294291 [2022-01-18 05:59:55,144 INFO L226 Difference]: Without dead ends: 294046 [2022-01-18 05:59:55,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=773, Invalid=3649, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 05:59:55,145 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 249 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 05:59:55,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 400 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 05:59:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294046 states. [2022-01-18 06:00:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294046 to 291437. [2022-01-18 06:00:03,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291437 states, 291436 states have (on average 3.7028884557844606) internal successors, (1079155), 291436 states have internal predecessors, (1079155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291437 states to 291437 states and 1079155 transitions. [2022-01-18 06:00:05,888 INFO L78 Accepts]: Start accepts. Automaton has 291437 states and 1079155 transitions. Word has length 25 [2022-01-18 06:00:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:05,888 INFO L470 AbstractCegarLoop]: Abstraction has 291437 states and 1079155 transitions. [2022-01-18 06:00:05,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 291437 states and 1079155 transitions. [2022-01-18 06:00:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:00:07,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:07,104 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:07,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:07,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:07,305 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:00:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash 727557782, now seen corresponding path program 39 times [2022-01-18 06:00:07,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:07,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433485861] [2022-01-18 06:00:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:07,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:07,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433485861] [2022-01-18 06:00:07,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433485861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096768795] [2022-01-18 06:00:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:00:07,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:07,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:07,412 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) [2022-01-18 06:00:07,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 06:00:07,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:00:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:07,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:00:07,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:07,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:07,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096768795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:07,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:07,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 06:00:07,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467152344] [2022-01-18 06:00:07,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:07,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:00:07,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:00:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:00:07,933 INFO L87 Difference]: Start difference. First operand 291437 states and 1079155 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:12,457 INFO L93 Difference]: Finished difference Result 295235 states and 1091102 transitions. [2022-01-18 06:00:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:00:12,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:00:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:14,728 INFO L225 Difference]: With dead ends: 295235 [2022-01-18 06:00:14,728 INFO L226 Difference]: Without dead ends: 295095 [2022-01-18 06:00:14,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=649, Invalid=2773, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 06:00:14,729 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 239 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:14,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 277 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:00:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295095 states. [2022-01-18 06:00:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295095 to 292362. [2022-01-18 06:00:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292362 states, 292361 states have (on average 3.7026347563457507) internal successors, (1082506), 292361 states have internal predecessors, (1082506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292362 states to 292362 states and 1082506 transitions. [2022-01-18 06:00:25,639 INFO L78 Accepts]: Start accepts. Automaton has 292362 states and 1082506 transitions. Word has length 25 [2022-01-18 06:00:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:25,639 INFO L470 AbstractCegarLoop]: Abstraction has 292362 states and 1082506 transitions. [2022-01-18 06:00:25,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 292362 states and 1082506 transitions. [2022-01-18 06:00:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:00:25,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:25,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:26,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:26,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:26,189 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:00:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:26,189 INFO L85 PathProgramCache]: Analyzing trace with hash 832207754, now seen corresponding path program 40 times [2022-01-18 06:00:26,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:26,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694954317] [2022-01-18 06:00:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:26,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:26,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694954317] [2022-01-18 06:00:26,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694954317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828531399] [2022-01-18 06:00:26,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:00:26,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:26,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:26,278 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) [2022-01-18 06:00:26,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 06:00:26,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:00:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:26,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:00:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:26,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:26,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828531399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:26,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:26,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 06:00:26,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366194972] [2022-01-18 06:00:26,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:26,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:00:26,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:26,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:00:26,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:00:26,755 INFO L87 Difference]: Start difference. First operand 292362 states and 1082506 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) [2022-01-18 06:00:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:31,537 INFO L93 Difference]: Finished difference Result 297667 states and 1099857 transitions. [2022-01-18 06:00:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:00:31,537 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 25 [2022-01-18 06:00:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:33,081 INFO L225 Difference]: With dead ends: 297667 [2022-01-18 06:00:33,081 INFO L226 Difference]: Without dead ends: 297642 [2022-01-18 06:00:33,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=550, Invalid=2312, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 06:00:33,082 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 230 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:33,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 304 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 06:00:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297642 states. [2022-01-18 06:00:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297642 to 293583. [2022-01-18 06:00:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293583 states, 293582 states have (on average 3.703598994488763) internal successors, (1087310), 293582 states have internal predecessors, (1087310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293583 states to 293583 states and 1087310 transitions. [2022-01-18 06:00:44,813 INFO L78 Accepts]: Start accepts. Automaton has 293583 states and 1087310 transitions. Word has length 25 [2022-01-18 06:00:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:00:44,813 INFO L470 AbstractCegarLoop]: Abstraction has 293583 states and 1087310 transitions. [2022-01-18 06:00:44,813 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) [2022-01-18 06:00:44,813 INFO L276 IsEmpty]: Start isEmpty. Operand 293583 states and 1087310 transitions. [2022-01-18 06:00:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:00:45,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:00:45,166 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:00:45,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 06:00:45,366 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,SelfDestructingSolverStorable89 [2022-01-18 06:00:45,367 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:00:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:00:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1322581018, now seen corresponding path program 41 times [2022-01-18 06:00:45,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:00:45,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116679692] [2022-01-18 06:00:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:00:45,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:00:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:00:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:45,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:00:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116679692] [2022-01-18 06:00:45,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116679692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:00:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563356164] [2022-01-18 06:00:45,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:00:45,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:00:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:00:45,473 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) [2022-01-18 06:00:45,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 06:00:45,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:00:45,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:00:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:00:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:00:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:45,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:00:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:00:46,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563356164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:00:46,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:00:46,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 06:00:46,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982665893] [2022-01-18 06:00:46,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:00:46,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:00:46,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:00:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:00:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:00:46,053 INFO L87 Difference]: Start difference. First operand 293583 states and 1087310 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:00:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:00:51,408 INFO L93 Difference]: Finished difference Result 295683 states and 1093304 transitions. [2022-01-18 06:00:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:00:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:00:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:00:53,002 INFO L225 Difference]: With dead ends: 295683 [2022-01-18 06:00:53,003 INFO L226 Difference]: Without dead ends: 295490 [2022-01-18 06:00:53,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=773, Invalid=3517, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:00:53,003 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 260 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:00:53,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 352 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:00:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295490 states. [2022-01-18 06:01:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295490 to 293891. [2022-01-18 06:01:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293891 states, 293890 states have (on average 3.7033413862329443) internal successors, (1088375), 293890 states have internal predecessors, (1088375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293891 states to 293891 states and 1088375 transitions. [2022-01-18 06:01:04,684 INFO L78 Accepts]: Start accepts. Automaton has 293891 states and 1088375 transitions. Word has length 25 [2022-01-18 06:01:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:04,684 INFO L470 AbstractCegarLoop]: Abstraction has 293891 states and 1088375 transitions. [2022-01-18 06:01:04,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 293891 states and 1088375 transitions. [2022-01-18 06:01:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:01:05,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:05,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:05,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:05,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:05,262 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:01:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash 442141958, now seen corresponding path program 42 times [2022-01-18 06:01:05,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:05,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873536893] [2022-01-18 06:01:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:05,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:05,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:05,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873536893] [2022-01-18 06:01:05,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873536893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:05,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199650828] [2022-01-18 06:01:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:01:05,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:05,361 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) [2022-01-18 06:01:05,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 06:01:05,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:01:05,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:01:05,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:05,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199650828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:05,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:05,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 06:01:05,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929664878] [2022-01-18 06:01:05,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:05,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:01:05,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:05,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:01:05,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:01:05,880 INFO L87 Difference]: Start difference. First operand 293891 states and 1088375 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:12,443 INFO L93 Difference]: Finished difference Result 296367 states and 1095507 transitions. [2022-01-18 06:01:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 06:01:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:01:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:14,618 INFO L225 Difference]: With dead ends: 296367 [2022-01-18 06:01:14,618 INFO L226 Difference]: Without dead ends: 296289 [2022-01-18 06:01:14,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:01:14,619 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 249 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:14,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 360 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:01:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296289 states. [2022-01-18 06:01:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296289 to 294244. [2022-01-18 06:01:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294244 states, 294243 states have (on average 3.7033302406514346) internal successors, (1089679), 294243 states have internal predecessors, (1089679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294244 states to 294244 states and 1089679 transitions. [2022-01-18 06:01:25,858 INFO L78 Accepts]: Start accepts. Automaton has 294244 states and 1089679 transitions. Word has length 25 [2022-01-18 06:01:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:25,858 INFO L470 AbstractCegarLoop]: Abstraction has 294244 states and 1089679 transitions. [2022-01-18 06:01:25,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 294244 states and 1089679 transitions. [2022-01-18 06:01:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:01:27,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:27,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:27,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:27,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:27,309 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:01:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1643963730, now seen corresponding path program 43 times [2022-01-18 06:01:27,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081017096] [2022-01-18 06:01:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:27,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:27,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081017096] [2022-01-18 06:01:27,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081017096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538430988] [2022-01-18 06:01:27,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:01:27,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:27,411 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) [2022-01-18 06:01:27,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 06:01:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:27,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:01:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:27,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:28,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538430988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:28,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:28,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 06:01:28,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695103571] [2022-01-18 06:01:28,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:28,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:01:28,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:01:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:01:28,017 INFO L87 Difference]: Start difference. First operand 294244 states and 1089679 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:32,330 INFO L93 Difference]: Finished difference Result 296525 states and 1096387 transitions. [2022-01-18 06:01:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:01:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:01:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:34,710 INFO L225 Difference]: With dead ends: 296525 [2022-01-18 06:01:34,711 INFO L226 Difference]: Without dead ends: 296420 [2022-01-18 06:01:34,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=563, Invalid=2193, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 06:01:34,711 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 193 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:34,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 307 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:01:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296420 states. [2022-01-18 06:01:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296420 to 294304. [2022-01-18 06:01:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294304 states, 294303 states have (on average 3.7035911968277593) internal successors, (1089978), 294303 states have internal predecessors, (1089978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294304 states to 294304 states and 1089978 transitions. [2022-01-18 06:01:45,757 INFO L78 Accepts]: Start accepts. Automaton has 294304 states and 1089978 transitions. Word has length 25 [2022-01-18 06:01:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:01:45,757 INFO L470 AbstractCegarLoop]: Abstraction has 294304 states and 1089978 transitions. [2022-01-18 06:01:45,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:01:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 294304 states and 1089978 transitions. [2022-01-18 06:01:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:01:46,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:01:46,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:01:46,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 06:01:46,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:46,315 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:01:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:01:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash -5117990, now seen corresponding path program 44 times [2022-01-18 06:01:46,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:01:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115655621] [2022-01-18 06:01:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:01:46,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:01:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:01:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:46,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:01:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115655621] [2022-01-18 06:01:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115655621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:01:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825876962] [2022-01-18 06:01:46,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:01:46,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:01:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:01:46,431 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) [2022-01-18 06:01:46,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 06:01:46,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:01:46,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:01:46,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:01:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:01:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:47,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:01:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:01:47,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825876962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:01:47,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:01:47,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 06:01:47,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93695380] [2022-01-18 06:01:47,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:01:47,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:01:47,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:01:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:01:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:01:47,758 INFO L87 Difference]: Start difference. First operand 294304 states and 1089978 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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) [2022-01-18 06:01:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:01:52,957 INFO L93 Difference]: Finished difference Result 296678 states and 1096654 transitions. [2022-01-18 06:01:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 06:01:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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 25 [2022-01-18 06:01:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:01:55,478 INFO L225 Difference]: With dead ends: 296678 [2022-01-18 06:01:55,478 INFO L226 Difference]: Without dead ends: 296410 [2022-01-18 06:01:55,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=923, Invalid=5239, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 06:01:55,479 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 277 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:01:55,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 513 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:01:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296410 states. [2022-01-18 06:02:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296410 to 294486. [2022-01-18 06:02:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294486 states, 294485 states have (on average 3.7033770820245513) internal successors, (1090589), 294485 states have internal predecessors, (1090589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294486 states to 294486 states and 1090589 transitions. [2022-01-18 06:02:07,010 INFO L78 Accepts]: Start accepts. Automaton has 294486 states and 1090589 transitions. Word has length 25 [2022-01-18 06:02:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:07,010 INFO L470 AbstractCegarLoop]: Abstraction has 294486 states and 1090589 transitions. [2022-01-18 06:02:07,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 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) [2022-01-18 06:02:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 294486 states and 1090589 transitions. [2022-01-18 06:02:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:02:08,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:08,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:08,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:08,406 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,SelfDestructingSolverStorable93 [2022-01-18 06:02:08,407 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:02:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:08,407 INFO L85 PathProgramCache]: Analyzing trace with hash 134174410, now seen corresponding path program 45 times [2022-01-18 06:02:08,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:08,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32984096] [2022-01-18 06:02:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:08,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:08,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32984096] [2022-01-18 06:02:08,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32984096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521070457] [2022-01-18 06:02:08,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:02:08,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:08,508 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) [2022-01-18 06:02:08,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 06:02:08,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:02:08,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:08,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:02:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:08,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:09,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521070457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:09,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:09,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 06:02:09,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008500449] [2022-01-18 06:02:09,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:09,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:02:09,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:02:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:02:09,009 INFO L87 Difference]: Start difference. First operand 294486 states and 1090589 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-01-18 06:02:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:13,813 INFO L93 Difference]: Finished difference Result 296892 states and 1097441 transitions. [2022-01-18 06:02:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:02:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 25 [2022-01-18 06:02:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:16,172 INFO L225 Difference]: With dead ends: 296892 [2022-01-18 06:02:16,172 INFO L226 Difference]: Without dead ends: 296847 [2022-01-18 06:02:16,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:02:16,172 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 209 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:16,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 472 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:02:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296847 states. [2022-01-18 06:02:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296847 to 294456. [2022-01-18 06:02:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294456 states, 294455 states have (on average 3.7034725170229748) internal successors, (1090506), 294455 states have internal predecessors, (1090506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294456 states to 294456 states and 1090506 transitions. [2022-01-18 06:02:26,919 INFO L78 Accepts]: Start accepts. Automaton has 294456 states and 1090506 transitions. Word has length 25 [2022-01-18 06:02:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:26,919 INFO L470 AbstractCegarLoop]: Abstraction has 294456 states and 1090506 transitions. [2022-01-18 06:02:26,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-01-18 06:02:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 294456 states and 1090506 transitions. [2022-01-18 06:02:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:02:27,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:27,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:27,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:27,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:27,479 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:02:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1483034154, now seen corresponding path program 46 times [2022-01-18 06:02:27,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:27,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553888881] [2022-01-18 06:02:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:27,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:27,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553888881] [2022-01-18 06:02:27,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553888881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092929215] [2022-01-18 06:02:27,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:02:27,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:27,600 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) [2022-01-18 06:02:27,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 06:02:27,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:02:27,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:27,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:02:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:27,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:28,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092929215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:28,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:28,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 06:02:28,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614782142] [2022-01-18 06:02:28,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:28,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:02:28,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:02:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:02:28,965 INFO L87 Difference]: Start difference. First operand 294456 states and 1090506 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:35,167 INFO L93 Difference]: Finished difference Result 296114 states and 1095132 transitions. [2022-01-18 06:02:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:02:35,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:02:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:37,293 INFO L225 Difference]: With dead ends: 296114 [2022-01-18 06:02:37,293 INFO L226 Difference]: Without dead ends: 295983 [2022-01-18 06:02:37,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=653, Invalid=3903, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 06:02:37,294 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 220 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:37,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 495 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:02:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295983 states. [2022-01-18 06:02:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295983 to 294478. [2022-01-18 06:02:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294478 states, 294477 states have (on average 3.703426753192949) internal successors, (1090574), 294477 states have internal predecessors, (1090574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294478 states to 294478 states and 1090574 transitions. [2022-01-18 06:02:48,285 INFO L78 Accepts]: Start accepts. Automaton has 294478 states and 1090574 transitions. Word has length 25 [2022-01-18 06:02:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:02:48,285 INFO L470 AbstractCegarLoop]: Abstraction has 294478 states and 1090574 transitions. [2022-01-18 06:02:48,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 294478 states and 1090574 transitions. [2022-01-18 06:02:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:02:49,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:02:49,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:02:49,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 06:02:49,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:49,682 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:02:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:02:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1774525126, now seen corresponding path program 47 times [2022-01-18 06:02:49,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:02:49,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599602846] [2022-01-18 06:02:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:02:49,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:02:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:02:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:49,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:02:49,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599602846] [2022-01-18 06:02:49,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599602846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:02:49,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106363930] [2022-01-18 06:02:49,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:02:49,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:02:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:02:49,811 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) [2022-01-18 06:02:49,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 06:02:49,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:02:49,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:02:49,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:02:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:02:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:50,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:02:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:02:50,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106363930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:02:50,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:02:50,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 06:02:50,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131014305] [2022-01-18 06:02:50,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:02:50,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:02:50,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:02:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:02:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:02:50,322 INFO L87 Difference]: Start difference. First operand 294478 states and 1090574 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:02:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:02:53,672 INFO L93 Difference]: Finished difference Result 295327 states and 1093005 transitions. [2022-01-18 06:02:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 06:02:53,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:02:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:02:56,014 INFO L225 Difference]: With dead ends: 295327 [2022-01-18 06:02:56,014 INFO L226 Difference]: Without dead ends: 295306 [2022-01-18 06:02:56,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:02:56,014 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 154 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:02:56,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 256 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 919 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-01-18 06:02:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295306 states. [2022-01-18 06:03:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295306 to 294739. [2022-01-18 06:03:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294739 states, 294738 states have (on average 3.7033161655436353) internal successors, (1091508), 294738 states have internal predecessors, (1091508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294739 states to 294739 states and 1091508 transitions. [2022-01-18 06:03:06,761 INFO L78 Accepts]: Start accepts. Automaton has 294739 states and 1091508 transitions. Word has length 25 [2022-01-18 06:03:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:06,761 INFO L470 AbstractCegarLoop]: Abstraction has 294739 states and 1091508 transitions. [2022-01-18 06:03:06,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 294739 states and 1091508 transitions. [2022-01-18 06:03:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:03:07,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:07,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:07,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:07,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:07,337 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:03:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:07,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1631955782, now seen corresponding path program 48 times [2022-01-18 06:03:07,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:07,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126904590] [2022-01-18 06:03:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:07,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:07,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126904590] [2022-01-18 06:03:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126904590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295902899] [2022-01-18 06:03:07,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:03:07,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:07,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:07,439 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) [2022-01-18 06:03:07,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 06:03:07,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:03:07,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:07,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:03:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:08,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295902899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:08,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:08,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 06:03:08,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270202020] [2022-01-18 06:03:08,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:08,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:03:08,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:08,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:03:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:03:08,120 INFO L87 Difference]: Start difference. First operand 294739 states and 1091508 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:12,367 INFO L93 Difference]: Finished difference Result 309184 states and 1138967 transitions. [2022-01-18 06:03:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:03:12,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:03:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:14,238 INFO L225 Difference]: With dead ends: 309184 [2022-01-18 06:03:14,238 INFO L226 Difference]: Without dead ends: 309077 [2022-01-18 06:03:14,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:03:14,238 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 145 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:14,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 286 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 682 Invalid, 0 Unknown, 212 Unchecked, 1.0s Time] [2022-01-18 06:03:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309077 states. [2022-01-18 06:03:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309077 to 294886. [2022-01-18 06:03:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294886 states, 294885 states have (on average 3.7032029435203553) internal successors, (1092019), 294885 states have internal predecessors, (1092019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294886 states to 294886 states and 1092019 transitions. [2022-01-18 06:03:26,788 INFO L78 Accepts]: Start accepts. Automaton has 294886 states and 1092019 transitions. Word has length 25 [2022-01-18 06:03:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:26,788 INFO L470 AbstractCegarLoop]: Abstraction has 294886 states and 1092019 transitions. [2022-01-18 06:03:26,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:26,788 INFO L276 IsEmpty]: Start isEmpty. Operand 294886 states and 1092019 transitions. [2022-01-18 06:03:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:03:27,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:27,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:27,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:27,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:27,369 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:03:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1079221178, now seen corresponding path program 49 times [2022-01-18 06:03:27,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:27,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270733068] [2022-01-18 06:03:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:27,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:27,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:27,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270733068] [2022-01-18 06:03:27,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270733068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:27,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838277407] [2022-01-18 06:03:27,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:03:27,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:27,499 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) [2022-01-18 06:03:27,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 06:03:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:03:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:27,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:28,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838277407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:28,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:28,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 06:03:28,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160713270] [2022-01-18 06:03:28,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:28,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:03:28,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:03:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:03:28,900 INFO L87 Difference]: Start difference. First operand 294886 states and 1092019 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:35,081 INFO L93 Difference]: Finished difference Result 363390 states and 1340875 transitions. [2022-01-18 06:03:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 06:03:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:03:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:03:37,213 INFO L225 Difference]: With dead ends: 363390 [2022-01-18 06:03:37,213 INFO L226 Difference]: Without dead ends: 362845 [2022-01-18 06:03:37,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=898, Invalid=4214, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:03:37,214 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 315 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:03:37,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 611 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:03:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362845 states. [2022-01-18 06:03:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362845 to 295410. [2022-01-18 06:03:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295410 states, 295409 states have (on average 3.7028628105440253) internal successors, (1093859), 295409 states have internal predecessors, (1093859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295410 states to 295410 states and 1093859 transitions. [2022-01-18 06:03:50,585 INFO L78 Accepts]: Start accepts. Automaton has 295410 states and 1093859 transitions. Word has length 25 [2022-01-18 06:03:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:03:50,586 INFO L470 AbstractCegarLoop]: Abstraction has 295410 states and 1093859 transitions. [2022-01-18 06:03:50,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:03:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 295410 states and 1093859 transitions. [2022-01-18 06:03:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:03:51,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:03:51,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:03:51,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 06:03:51,435 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,SelfDestructingSolverStorable98 [2022-01-18 06:03:51,435 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:03:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:03:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash 762260422, now seen corresponding path program 50 times [2022-01-18 06:03:51,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:03:51,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771995088] [2022-01-18 06:03:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:03:51,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:03:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:03:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:51,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:03:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771995088] [2022-01-18 06:03:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771995088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:03:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683305784] [2022-01-18 06:03:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:03:51,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:03:51,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:03:51,557 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) [2022-01-18 06:03:51,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 06:03:51,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:03:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:03:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:03:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:03:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:51,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:03:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:03:52,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683305784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:03:52,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:03:52,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 06:03:52,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486934438] [2022-01-18 06:03:52,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:03:52,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:03:52,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:03:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:03:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:03:52,072 INFO L87 Difference]: Start difference. First operand 295410 states and 1093859 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-01-18 06:03:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:03:58,016 INFO L93 Difference]: Finished difference Result 297973 states and 1101719 transitions. [2022-01-18 06:03:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:03:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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 25 [2022-01-18 06:03:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:00,225 INFO L225 Difference]: With dead ends: 297973 [2022-01-18 06:04:00,225 INFO L226 Difference]: Without dead ends: 297734 [2022-01-18 06:04:00,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:04:00,226 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 221 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:00,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 340 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1312 Invalid, 0 Unknown, 171 Unchecked, 0.7s Time] [2022-01-18 06:04:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297734 states. [2022-01-18 06:04:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297734 to 295781. [2022-01-18 06:04:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295781 states, 295780 states have (on average 3.702823044154439) internal successors, (1095221), 295780 states have internal predecessors, (1095221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295781 states to 295781 states and 1095221 transitions. [2022-01-18 06:04:12,080 INFO L78 Accepts]: Start accepts. Automaton has 295781 states and 1095221 transitions. Word has length 25 [2022-01-18 06:04:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:12,080 INFO L470 AbstractCegarLoop]: Abstraction has 295781 states and 1095221 transitions. [2022-01-18 06:04:12,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 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) [2022-01-18 06:04:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 295781 states and 1095221 transitions. [2022-01-18 06:04:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:04:12,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:12,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:12,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 06:04:12,665 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,SelfDestructingSolverStorable99 [2022-01-18 06:04:12,665 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:04:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash -649407290, now seen corresponding path program 51 times [2022-01-18 06:04:12,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:12,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37625261] [2022-01-18 06:04:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:12,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:12,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37625261] [2022-01-18 06:04:12,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37625261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587523664] [2022-01-18 06:04:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:04:12,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:12,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:12,826 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) [2022-01-18 06:04:12,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 06:04:12,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:04:12,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:04:12,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:13,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:13,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587523664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:13,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:13,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 06:04:13,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614332403] [2022-01-18 06:04:13,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:13,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:04:13,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:04:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:04:13,489 INFO L87 Difference]: Start difference. First operand 295781 states and 1095221 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:20,102 INFO L93 Difference]: Finished difference Result 302724 states and 1117035 transitions. [2022-01-18 06:04:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 06:04:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:04:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:22,176 INFO L225 Difference]: With dead ends: 302724 [2022-01-18 06:04:22,176 INFO L226 Difference]: Without dead ends: 302050 [2022-01-18 06:04:22,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1473, Invalid=5837, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 06:04:22,177 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 423 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:22,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 478 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:04:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302050 states. [2022-01-18 06:04:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302050 to 296088. [2022-01-18 06:04:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296088 states, 296087 states have (on average 3.703293288796874) internal successors, (1096497), 296087 states have internal predecessors, (1096497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296088 states to 296088 states and 1096497 transitions. [2022-01-18 06:04:36,927 INFO L78 Accepts]: Start accepts. Automaton has 296088 states and 1096497 transitions. Word has length 25 [2022-01-18 06:04:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:04:36,927 INFO L470 AbstractCegarLoop]: Abstraction has 296088 states and 1096497 transitions. [2022-01-18 06:04:36,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 296088 states and 1096497 transitions. [2022-01-18 06:04:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:04:37,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:04:37,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:04:37,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 06:04:37,504 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,SelfDestructingSolverStorable100 [2022-01-18 06:04:37,505 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:04:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:04:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 329150154, now seen corresponding path program 52 times [2022-01-18 06:04:37,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:04:37,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005264276] [2022-01-18 06:04:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:04:37,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:04:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:04:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:37,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:04:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005264276] [2022-01-18 06:04:37,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005264276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:04:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307236579] [2022-01-18 06:04:37,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:04:37,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:04:37,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:04:37,650 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) [2022-01-18 06:04:37,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 06:04:37,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:04:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:04:37,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 06:04:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:04:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:37,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:04:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:04:38,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307236579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:04:38,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:04:38,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 06:04:38,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498133010] [2022-01-18 06:04:38,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:04:38,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:04:38,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:04:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:04:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:04:38,308 INFO L87 Difference]: Start difference. First operand 296088 states and 1096497 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:04:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:04:45,890 INFO L93 Difference]: Finished difference Result 338251 states and 1259640 transitions. [2022-01-18 06:04:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 06:04:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 06:04:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:04:48,764 INFO L225 Difference]: With dead ends: 338251 [2022-01-18 06:04:48,764 INFO L226 Difference]: Without dead ends: 337273 [2022-01-18 06:04:48,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2042, Invalid=7464, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 06:04:48,765 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 600 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:04:48,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 577 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:04:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337273 states. [2022-01-18 06:04:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337273 to 296607. [2022-01-18 06:05:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296607 states, 296606 states have (on average 3.703171884587635) internal successors, (1098383), 296606 states have internal predecessors, (1098383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296607 states to 296607 states and 1098383 transitions. [2022-01-18 06:05:03,218 INFO L78 Accepts]: Start accepts. Automaton has 296607 states and 1098383 transitions. Word has length 25 [2022-01-18 06:05:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:05:03,218 INFO L470 AbstractCegarLoop]: Abstraction has 296607 states and 1098383 transitions. [2022-01-18 06:05:03,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 296607 states and 1098383 transitions. [2022-01-18 06:05:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 06:05:03,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:05:03,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:05:03,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:04,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:04,099 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:05:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:05:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 996526086, now seen corresponding path program 53 times [2022-01-18 06:05:04,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:05:04,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719407561] [2022-01-18 06:05:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:05:04,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:05:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:05:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:04,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:05:04,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719407561] [2022-01-18 06:05:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719407561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:05:04,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739918037] [2022-01-18 06:05:04,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:05:04,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:05:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:05:04,224 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) [2022-01-18 06:05:04,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 06:05:04,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:05:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:05:04,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:05:04,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:05:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:04,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:05:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:05:04,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739918037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:05:04,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:05:04,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 06:05:04,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327655225] [2022-01-18 06:05:04,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:05:04,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:05:04,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:05:04,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:05:04,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:05:04,756 INFO L87 Difference]: Start difference. First operand 296607 states and 1098383 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2022-01-18 06:05:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:05:09,859 INFO L93 Difference]: Finished difference Result 297220 states and 1100215 transitions. [2022-01-18 06:05:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:05:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 25 [2022-01-18 06:05:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:05:12,255 INFO L225 Difference]: With dead ends: 297220 [2022-01-18 06:05:12,255 INFO L226 Difference]: Without dead ends: 297205 [2022-01-18 06:05:12,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:05:12,255 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 153 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:05:12,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 248 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 815 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-01-18 06:05:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297205 states. [2022-01-18 06:05:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297205 to 296766. Received shutdown request... [2022-01-18 06:05:21,001 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:05:21,001 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 [2022-01-18 06:05:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296766 states, 296765 states have (on average 3.7030748235135547) internal successors, (1098943), 296765 states have internal predecessors, (1098943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:05:21,449 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 06:05:21,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 06:05:21,672 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,SelfDestructingSolverStorable102 [2022-01-18 06:05:21,673 WARN L594 AbstractCegarLoop]: Verification canceled: while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). [2022-01-18 06:05:21,675 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 06:05:21,675 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 06:05:21,675 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 06:05:21,678 INFO L732 BasicCegarLoop]: Path program histogram: [53, 22, 22, 2, 2, 1, 1] [2022-01-18 06:05:21,682 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:05:21,682 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:05:21,686 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:05:21 BasicIcfg [2022-01-18 06:05:21,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:05:21,686 INFO L158 Benchmark]: Toolchain (without parser) took 635343.98ms. Allocated memory was 343.9MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 305.3MB in the beginning and 11.7GB in the end (delta: -11.4GB). Peak memory consumption was 8.6GB. Max. memory is 16.0GB. [2022-01-18 06:05:21,686 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 343.9MB. Free memory is still 306.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:05:21,686 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.58ms. Allocated memory is still 343.9MB. Free memory was 305.2MB in the beginning and 303.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:05:21,686 INFO L158 Benchmark]: Boogie Preprocessor took 16.45ms. Allocated memory is still 343.9MB. Free memory was 303.7MB in the beginning and 302.7MB in the end (delta: 964.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:05:21,686 INFO L158 Benchmark]: RCFGBuilder took 247.36ms. Allocated memory is still 343.9MB. Free memory was 302.7MB in the beginning and 293.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 06:05:21,687 INFO L158 Benchmark]: TraceAbstraction took 635052.83ms. Allocated memory was 343.9MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 293.0MB in the beginning and 11.7GB in the end (delta: -11.4GB). Peak memory consumption was 8.6GB. Max. memory is 16.0GB. [2022-01-18 06:05:21,687 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 0.12ms. Allocated memory is still 343.9MB. Free memory is still 306.4MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.58ms. Allocated memory is still 343.9MB. Free memory was 305.2MB in the beginning and 303.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.45ms. Allocated memory is still 343.9MB. Free memory was 303.7MB in the beginning and 302.7MB in the end (delta: 964.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 247.36ms. Allocated memory is still 343.9MB. Free memory was 302.7MB in the beginning and 293.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 635052.83ms. Allocated memory was 343.9MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 293.0MB in the beginning and 11.7GB in the end (delta: -11.4GB). Peak memory consumption was 8.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructed, input type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 634.9s, OverallIterations: 103, TraceHistogramMax: 3, PathProgramHistogramMax: 53, EmptinessCheckTime: 16.4s, AutomataDifference: 231.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18871 SdHoareTripleChecker+Valid, 32.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18871 mSDsluCounter, 21326 SdHoareTripleChecker+Invalid, 26.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2223 IncrementalHoareTripleChecker+Unchecked, 31241 mSDsCounter, 6931 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 61056 IncrementalHoareTripleChecker+Invalid, 70210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6931 mSolverCounterUnsat, 2918 mSDtfsCounter, 61056 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6778 GetRequests, 3405 SyntacticMatches, 232 SemanticMatches, 3141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43028 ImplicationChecksByTransitivity, 61.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=296607occurred in iteration=102, InterpolantAutomatonStates: 3025, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 324.3s AutomataMinimizationTime, 103 MinimizatonAttempts, 822399 StatesRemovedByMinimization, 102 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 39.0s InterpolantComputationTime, 4563 NumberOfCodeBlocks, 4556 NumberOfCodeBlocksAsserted, 331 NumberOfCheckSat, 6462 ConstructedInterpolants, 103 QuantifiedInterpolants, 52221 SizeOfPredicates, 180 NumberOfNonLiveVariables, 5822 ConjunctsInSsa, 1177 ConjunctsInUnsatCore, 297 InterpolantComputations, 10 PerfectInterpolantSequences, 371/2182 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